DESC:
Field of the invention
The present invention relates to powder formulations. More specifically the present invention relates to stable reconstitutable powdered formulations.

Background and the prior art
Transport of liquid formulations is often associated with high costs. Packaging costs increase substantially for liquid products because of their heaviness and bulkiness. Further, these products also necessitate robust packaging units. This invariably results in use of increased levels of plastics in the packaging material, which in turn are linked with environmental pollution. Not all the packaging materials are recycled to the fullest. Furthermore, liquid products are also vulnerable to stability issues and spillage during transport. Storage of high amounts of these products also presents formidable challenges since they require enormous shelf-space.

There is provided in accordance with the present disclosure a reconstitutable powder formulation that can be converted to stable liquid formulations without compromising on aesthetics, stability and functionality. The reconstitutable powder formulations as provided in the present disclosure therefore preempt the problems as described above.

Rehydratable formulations in the form of powders had been disclosed for various end-use applications. For example, there is disclosed in US4330438 a powdered shampoo composition. IN201821030525 discloses reconstituted surfactant-based powder product which has good solubility in water and forms a stable gel when dispersed in water. However, these compositions lack long term stability across varied environmental conditions of temperature and water TDS.

Having said, reconstitutable powders give the end consumers a lot of freedom during its reconstitution. An apparently simple reconstitution step when carried out by skilled artisan working under controlled lab/factory conditions can provide a very desirable end product vis-à-vis an untrained hand coupled with uncontrolled conditions of rehydration. Therefore, chemistry of these reconstitutable powders has to be defined taking into cognizance the source of water that may alternatively be used, TDS levels of the water that is being used, environmental conditions at which such reconstitution happens and a myriad of possibilities owing to the demographics of the reconstituting hand etc. One of the shortcomings for example that can be noted on reconstitution of a poorly crafted reconstitutable powder formulations is that once the powder is admixed with water to form a liquid product, it does not remain stable over a period of time. Invariably, the reconstituted liquid products prepared from known powder formulations are prone either to sedimentation or layer separation.

Further, stability and sensorial of the liquid product made from reconstitutable powder formulation shall vary if the powder formulation is not designed to accommodate a plethora of possible variation causing factors that include hardness (TDS), minerals and salt content of the water used for reconstitution and the temperature at which the reconstituted liquid product is stored. As a result, very often, depending upon the conditions under which water is admixed with the powder, the end consumer does not always get the liquid product of desired aesthetics, stability and functionality. This results in poor perception of the product by the end consumer and it drastically dissuades the consumer from using such formulations despite of their otherwise obvious cost and environmental advantages.

Object of the present invention
It is one of the objects of the present invention to provide a powder formulation that on reconstitution provides a stable liquid formulation.

It is one of the objects of the present invention to provide a powder formulation that can be reconstituted using water with varying degrees of hardness (TDS).

It is one of the objects of the present invention to provide a powder formulation that on hydration provides a sensorially superior and aesthetically pleasing formulation.

Summary of the Invention
According to one aspect of the present invention there is provided a reconstitutable powder formulation comprising :
(i) a primary surfactant blend comprising at least one sulfate-based surfactant;
(ii) a secondary surfactant blend comprising at least one non-sulfate surfactant and at least one sulfonated surfactant;
(iii) a polysaccharide-based thickening system comprising at least one cellulose derivative and at least one galactomannan derivative or a combination thereof;
wherein the amount of the primary surfactant blend is always in excess of the amount of secondary surfactant blend and wherein the reconstitutable powder formulation is capable of providing a stable reconstituted liquid formulation which is stable for a period of at least 3 months.

In another aspect of the present invention, there is provided a method of preparing a stable reconstituted liquid formulation using the powder formulation of the present invention, said method comprising the steps:
(i) mixing water with said powder formulation of the present invention in a ratio ranging from 4.5:90 to 4.5 : 150 in a container to obtain an admixture;
(ii) shaking the admixture in the container for a period ranging from 30sec to 120sec to obtain a stable reconstituted liquid formulation.

Detailed Description of the invention
Definitions:
In the context of the present invention, the expression “surfactant blend” is to be construed to mean either a single surfactant or a combination of one or more surfactants.

In a first aspect, the present invention provides a reconstitutable powder formulation comprising a surfactant system and a polysaccharide-based thickening system. The surfactant system comprises a primary surfactant blend and a secondary surfactant blend. The surfactant system of the present invention is designed in a manner such that the amount of the primary surfactant blend is always in excess of the amount of secondary surfactant blend. The reconstitutable powder formulation of the present invention is specifically adapted to provide a stable reconstituted liquid formulation. Typically, the stability of the reconstituted liquid formulation prepared using the powder formulation of the present invention ranges from 1 month to 24 months, preferably from 1 months to 18 months and most preferably from 1 month to 6 months.

The powder formulation of the present invention is specifically adapted to mixed with water with varying degrees of hardness and mineral and chloride contents under a wider range of climatic conditions to obtain aesthetically appealing and stable liquid products that can be used for a wide range of end applications that include but are not limited to body wash, hand wash, shower gel and the like.
The primary surfactant used in the present invention can be selected from alkyl ether sulphates with and without ethoxylation and alkyl sulphates. In one of the embodiments, alkyl sulfate is used as the primary surfactant. One of the exemplary embodiments comprises sodium lauryl sulfate as the primary surfactant. Typically, the amount of primary surfactant blend ranges from 35 wt% to 82 wt% with respect to the total weight of the formulation.

The secondary surfactant blend comprises at least one surfactant selected from the group consisting of sulfate-free surfactant, sulfonated surfactant, amphoteric surfactant or any combination thereof.

Typically, the sulfate free surfactant is selected from the group consisting of taurates, glycinates, glutmates, sarcocinates, isethionate, Sulfoacetates, sulfosuccinates and combinations thereof. The preferred sulfate-free surfactant is at least one selected from the group consisting of Sodium Cocoyl Isthionate, sodium lauroyl isethionate, taurate, glutmate or a combination thereof.

In some of the embodiments, the sulfate-free surfactant in the secondary blend is sodium Cocoisothionate. Typically, the amount of non-sulfate surfactant in the powder formulation varies from 1 wt% to 10wt% with respect to the total weight of the formulation.

Typically, the sulfonated surfactant is selected from the group that consists of alpha olefin sulfonate, linear alkyl benzene-based surfactants or any combination thereof.

In one of the preferred embodiments, C14-C18 alpha olefin sulfonate is used as a sulfonated surfactant. Typically, the amount of sulfonated surfactant in the powder composition ranges from ranges from 5 wt% to 10 wt% of the total weight of the powder formulation.

In some of embodiments, the secondary surfactant blend comprises a combination of a sulfate-free surfactant and a sulfonated surfactant.

In a preferred embodiment, the secondary surfactant blend in the powder formulation of the present formulation comprises C14-C18 alpha olefin sulfonate and sodium Cocoisothionate.

In some of the embodiments, the secondary surfactant blend may further comprise an amphoteric surfactant. The amphoteric surfactant may typically be selected from the group consisting of betaines and sultaines or any combination thereof. In some of the embodiments, the amphoteric surfactant is cocamidopropyl betaine.

The amount of secondary surfactant in the surfactant system in the powder formulation of the present invention ranges from about 0.5 wt% to 20 wt% with respect to the total amount of the powder formulation.

The amount of the primary surfactant in the surfactant system is higher than the combined amounts of secondary surfactants with respect to the total weight of the surfactant system. The amount of the primary surfactant in the surfactant system with respect to the total weight of powder formulation is in the range from 35wt% to 82 wt%.

Total put together, the amount of surfactant system present in the powder formulation is in the range from 45 to 95 wt% with respect to the total weight of the formulation.

The polysaccharide-based thickening system used in the present invention comprises at least one thickener selected from the group consisting of cellulose derivative, a galactomannan derivative or a combination thereof. The cellulose derivative is selected from the group consisting of Sodium carboxymethyl cellulose, hydroxyethyl cellulose, carboxy ethyl cellulose, HPMC, and a combination thereof. The galactomannan derivative is at least one selected from the group consisting of guar derivatives, carrageenan or combination thereof.

In some of the exemplified embodiments, the cellulose derivative is Sodium carboxymethyl cellulose. The total amount of cellulose derivative in the formulation ranges from about 15wt% to about 30wt% by weight with respect to the total weight of the formulation. In one of the embodiments the galactomannan derivative in the formulation is a nonionic hydroxypropyl guar. The total amount of guar derivative with respect to the total weight of the formulation is in an amount ranging from 2 wt% to 10 wt%. In some of the embodiments, the guar derivative present in the formulation is a non-ionic hydroxypropyl guar characterized by high molecular weight i.e., average of 1.1M to 1.6M.

In some of the embodiments, the ratio of amounts of the cellulose derivative to the galactomannan derivative in the polysaccharide-based thickening system is in the range from 8:1 to 1:8. In the exemplified embodiment, the ratio is 4:9. Typically, the total amount of the polysaccharide-based thickening system in the powder formulation is in the range from 20 wt% to 40 wt% with respect to the total weight of the powder formulation.

The powder formulation of the present invention may further comprise an anticaking agent selected from the group consisting of precipitated silica, hydrated silica, carbonates, stearates of calcium and magnesium and combinations thereof. The amount of anticaking agent in the formulation ranges from about 0.01wt% to about 5wt%.

In some of the embodiments, the powder formulation of the present invention may further comprise at least one antimicrobial active selected from the group consisting of metals or salts thereof, quaternary ammonium compounds, biguanides, triclosan, anti-microbial peptides, and the like.

In one embodiment, the powder formulation of the present invention comprises silver as an antimicrobial active. The amount of the antimicrobial agent varies in the range from 0.001 to about 3 wt%.

The present powder formulation may further comprise at least one excipient selected from the group consisting of chelating agent (0.001-2% by weight), buffering agent (0-5% by weight), coloring agent (0-0.5% by weight), fragrance (0.1%-8% by weight) and preservative (0.001-5% by weight). The preservative is at least one selected from the group that includes but is not limited to Iodopropynyl butylcarbamate, DMDM, Sodium Benzoate, Diazolidinyl urea, imidazolidinyl urea, Tricolosan, Methyl Paraben, isopropyl paraben, Chloroxylenol, Ethylparaben, Propylparaben, phenoxyethanol, potassium sorbate and combinations thereof. In one of the exemplified embodiments, methyl paraben is used as the preservative in an amount of 3 wt%.

The powder formulation of the present invention when reconstituted provides a translucent formulation or transparent formulation.

The powder formulation can be reconstituted using distilled water, tap water, bottled water, filtered water, potable water, mineral water, demineralized water, RO water or any mixture thereof. Typically, the water used for preparing reconstituted formulation has a Total Dissolved Solids (TDS) in the range from 0 to 2500ppm, preferably 0 to 2000ppm and total chloride content in the water ranges from 0.002wt% to 2 wt%. The water may be added to the powder formulation in the ratio 4.5:90 to 4.5: 150, preferably 4.5gm powder dissolved in 100gm of water.

According to another embodiment of the present invention there is provided a method for preparation of the powder formulation; said method comprising the steps of:
(i) mixing all the powder components comprising primary surfactants, secondary surfactants, polysaccharide-based thickening system in a blender for 30-50mins,
(ii) adding color and mixing for 10 -20 mins,
(iii) adding fragrance and mixing for 5- 15mins, and
(iv) sieving to obtain the final homogenous powder.

According to yet another embodiment of the present invention there is provided a method of producing a stable reconstituted liquid formulation; said method comprising the steps of :
(i) admixing water with the powder formulation in a ratio ranging from 4.5:90 to 4.5 : 150
(ii) stirring the resulting admixture for a period ranging from 30sec to 120sec to obtain a stable liquid formulation.

The viscosity of the stable reconstitutable formulation ranges from 800 cps to 1600 cps.

The present formulation in the powder form affords a stable (stability in terms of viscosity and appearance in terms of layer separation) liquid composition upon admixing with water of various TDS levels (0 to 2000ppm). Further, the reconstituted liquid formulations prepared using the powder formulations of the present invention remain stable over a wide range of temperature and climatic conditions. Further, the resulting liquid formulation remains stable for a time that ranges from at least 3 months to about 24 months. These formulations can be easily adapted as handwash, bodywash, facewash and the like. The reconstituted liquid formulation in some of the embodiments are transparent. Alternatively, in some of the embodiments, the liquid formulations are translucent.

The present invention is now being illustrated by way of non-limiting examples.

Examples:
Samples of reconstituted liquid compositions were prepared using the powder of working and non-working examples as tabulated in Table 1 and 2. All the amounts of the ingredients in Table 1 and Table 2 are in wt.% with respect to the total weight of the formulation.

The powder formulation was prepared by a process with following steps:
(i) mixing all the powder raw materials one by one in the blender for 30-50mins, adding color and mixing for 10 -20 mins,
(ii) adding fragrance and mixing for 5- 15mins,
(iii) sieving the resulting admixture to obtain the final homogenous powder.

Respective liquid formulations were prepared from the powder formulations in Table 1 and Table 2. Powder (9gm) was added in 200 gm of water for 2mins accompanied by hand shaking. Samples were kept at rest for 48 hours and then values and visual observations were recorded.
Working Examples
Table 1
S.No. Ingredients Weight% Weight % Weight % Weight % Weight %
Working Example 1 Working Example 2 Working Example 3 Working Example 4 Working Example 5
1 EDTA Tetra Sodium 0.2 0.2 0.2 0.2 0.2
2 Sodium Lauryl Sulfate 55 56.00 68.00 66.00 58.00
3 Sodium Cocoyl Isethionate (85% active) 3 3.0 1.00 2.00 3.0
4 Sodium C14-C18 Olefin Sulfonate (90% active) 9.75 9.75 6.00 7.00 7.75
5 Hydroxypropyl Guar 8 8.00 3.00 5.00 8.00
6 Sodium carboxymethyl cellulose 18 18.00 22.00 20.00 18.00
7 Precipitated Silica 0.05 0.05 0.05 0.05 0.05
8 Excipients (color, fragrance, preservatives,) 6 5.00 5.00 5.00 5.00
Total 100 100.00 100.00 100.00 100.00
Observation : Above are workable examples
Stability of finished goods (FG)at different environmental conditions The final reconstituted products were found to be stable at room temperature, 5 0C, 40 0C, 400C + 75% RH for 6 months.

Non-working Examples
Table 2
S.No. Ingredients NWE1 NWE2 NWE3 NWE4 NWE5 NWE6 NWE7

1 EDTA TETRA SODIUM 0.20 0.20 0.20 0.20 0.20 0.20 0.20
2 Sodium Lauryl Sulfate (SLS) 50 82.35 30.00 51.75 52.75 62.00 62.00
3 Sodium Cocoyl Isethionate (SCI) (85% active) 0.2 1.00 12.00 11.00 1.00 15.00 15.00
4 Sodium C14-C 18 Olefin Sulfonate (90% active) 20 5.00 25.75 27.00 1.00 5.00 2.00
5 Hydroxypropyl Guar 19.55 3.00 5.00 1.00 10.00 1.00 15.00
6 Sodium carboxymethyl cellulose 5 3.40 22.00 4.00 30.00 12.00 1.00
7 Precipitated Silica 0.05 0.05 0.05 0.05 0.05 0.05 0.05
8 Excipients (color, fragrance, preservatives,) 6 5.00 5.00 5.00 5.00 5.00 4.80
Total 100.00 100.00 100.00 100.00 100.00 100.00
Observation :
The amounts of Hydoxypropyl guar and alpha olefin sulfonate are outside the working ranges. Amount of SLS is above the working limit of the present invention. Amount of SLS is below the working limit of the present invention. Total amount of secondary surfactant blend is above higher working limit of the present invention Total amount of of secondary surfactant blend is below the lower working limit of the present invention. These are non-working examples wherein the cellulose derivative to galactomannan derivative is either below or above the working ratio range of 8:1 to 1:8

Reconstituted liquid formulations were prepared using powder prepared as per the working and non-working examples and admixing 9 gm of the respective powders with 200gms of water samples with water with varying TDS. The respective liquid admixtures were subjected constant hand shaking for 1-2 mins and respective data on product appearance and stability was obtained by observing liquid products post 48 hours.

The observations of various samples of reconstituted liquid formulations using powders prepared according to working and non-working examples in Table 1 and Table 2 are provided in Table 3 below:

Table 3: Stability of FG reconstituted using water with varying TDS (Powders from working examples (WE1 to WE5)
Water Source with TDS Viscosity (in cps) post 48 hours of reconstitution Product Appearance
post 48 hours of reconstitution
WE 1 WE2 WE3 WE4 WE5 WE 1 WE2 WE3 WE4 WE5
Water with low hardness (0-50) 1200 1100 920 1000 1200

All the samples were found to be stable without any visual clues such as separation or sedimentation or haziness.
Water with low hardness (50-200) 1290 1020 980 900 890
Water with medium Hardness (TDS 200-300) 1630 1100 900 910 950
Water with High Hardness
(TDS 300-500) 1390 1210 960 1010 900
Water with very High Hardness (500-700) 1270 1070 882 890 900
Saline Water (0.9wt% Sodium Chloride) 1380 1020 930 910 950

Table 4: Stability of FG reconstituted using water with varying TDS (Powders from working examples (WE1 to WE5)
Water Source with TDS Viscosity (in cps)
post 48 hours of reconstitution Product Appearance
post 48 hours of reconstitution
NWE 1 NWE2 NWE3 NWE4 NWE5 NWE6 NWE7 NWE 1 NWE2 NWE3 NWE4 NWE5 NWE 6 NWE7

Water with low hardness (0-50) 600 NA* 620 NA* 2600 180 2000 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid
Water with low hardness (50-200) 160 NA* 600 NA* 2330 190 1880 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid
Water with medium Hardness (TDS 200-300) 640 NA* 580 NA* 2560 100 1910 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid
Water with High Hardness
(TDS 300-500) 300
NA* 520 NA* 2500 110 1820 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid
Water with very High Hardness (500-700) 600 NA* 500 NA* 2200 100 1900 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid
Saline Water (0.9wt% Sodium Chloride) 780 NA* 480 NA* 2000 80 2000 LS* Too watery Hazy and Turbid Sedimentation Non-uniform
Thick gel LS* Hazy and Turbid

NA* - Non-acceptable, the viscosity in these samples was too low to be accepted by consumers for various cleansing products.
LS*- Layer Separation

It was observed that the viscosity values of the liquid formulations obtained using non-working examples 1, 2, 3, 4 and 6 were below the desired and acceptable level. Further, from aesthetic perception point of view, the samples prepared from non-working examples were found to be non-acceptable on account of various reasons as recited in Table 4.

Non-working examples 2 demonstrates that if the amount of sulfated surfactant in the primary blend is above the higher working limit of the present invention, then the resulting reconstituted formulation is too thin, fares poorly on fomability as well as spreadability. On the other hand, non-working example 3 demonstrates that if the amount of sulfated surfactant in the primary blend is below the lower specified limit of the present invention, then the resulting reconstituted formulation is unstable and it also is prone to haziness. Further, its foambility is also severely compromised on account of the lower amount of sulfated surfactant.

Non-working example 4 demonstrates that if the amount of secondary surfactant blend comprising alpha olefin sulfonate and sodium cocoyl isethionate is above the higher working limit then the resulting powder upon reconstitution affords liquid formulation with extremely low viscosity. Further, these samples also turn out to be prone to sedimentation. Non-working example 5, on the other hand shows that when the amount of secondary surfactant blend is lower than the limit specified in accordance of the present invention then the liquid formulation obtained from such powder is too viscous thereby posing severe challenge in terms of spreadability. Further, such product is prone to turn hazy during storage.

Apart from surfactant blends, the polysaccharide thickening system plays a critical role in ensuring product stability. If the amounts of the sodium carboxymethyl cellulose and hydroxypropyl guar are outside the ratio range on higher side; as in non-working example 7, then the resulting powder affords liquid formulations upon reconstitution that is prone to haziness upon storage. Further, it was too viscous and slimy thereby rendering it highly unacceptable for the consumer. In example, 6 it was observed that if the amounts of the polysaccharide thickening agents is lower than the desired ratio in accordance with the present invention then the liquid formulations derived from such powder is prone the layer separation, a highly unacceptable outcome from any perspective.

It is therefore concluded that indicating instability, poor aesthetics and such formulations were not found to be suitable for consumer use.

Examples : Experiments were conducted with varying levels of dilution with the powder composition of the present invention

Example a : (negative) (Too high dilution level ) (Dilution Ratio of powder to water: 4.5 to 175)
The reconstitutable powder (4.5 gm) as prepared using the working example 1 was admixed with 175ml of tap water with TDS of 643 hardness and the resulting admixture was shaken well in a beaker for a period ranging from 120 seconds to 2 hours to obtain a reconstituted liquid composition with viscosity of 250 cps. The prepared sample was set aside for a time period of 24 hours to check it stability. The sample was found to be not acceptable from viscosity perspective. Since it was too thin.

Example b : (positive ) (Dilution Ratio of powder to water: 4.5 to 100)
The reconstitutable powder (4.5 gm) as prepared using the working example 1 was admixed with 100ml of tap water with TDS of 643 hardness and the resulting admixture was shaken well in a beaker for a period ranging from 120seconds to 2hours to obtain a reconstituted liquid composition with viscosity of 1070 cps. The prepared sample was set aside for a time period of 24 hours to check it stability. The sample was found to be stable even after storing at room temperature for 6 months.

Example c: (Negative) (Too less dilution level) (Dilution Ratio of powder to water: 4.5 to 70) The reconstitutable powder (4.5 gm) as prepared using the working example 1 was admixed with 70ml of tap water with TDS of 643 hardness and the resulting admixture was shaken well in a beaker for a period ranging from 120 seconds to 2 hours to obtain a reconstituted liquid composition with viscosity of 1800 cps. The prepared sample was set aside for a time period of 24 hours to check it stability. The sample was found to be very thick with severe spread ability and foam quality issues.

Example d (Dilution Ratio of powder to water: 4.5 to 100)
The reconstitutable powder available in market (4.5 gm) from one of the reconstitutable powders as available in the market was admixed with 100 ml of tap water with TDS 643 and the resulting admixture was shaken well in a beaker for a period ranging from 120seconds to 2 hours to obtain a reconstituted liquid composition with viscosity of 670 cps. The prepared sample was set aside for a time period of 24 hours to check it stability. Even though the sample was found to be stable after 24 hours, after a period of 1 month, layer separation was observed.
,CLAIMS:
1. A reconstitutable powder formulation comprising
(i) a primary surfactant blend comprising at least one sulfate-based surfactant;
(ii) a secondary surfactant blend comprising at least one non-sulfate surfactant and at least one sulfonated surfactant;
(iii) a polysaccharide-based thickening system comprising at least one cellulose derivative and at least one galactomannan derivative or a combination thereof,
wherein the amount of the primary surfactant blend is always in excess of the amount of secondary surfactant blend and wherein the reconstitutable powder formulation is capable of providing a stable reconstituted liquid formulation which is stable for a period of at least 3 months.

2. The reconstitutable powder formulation as claimed in claim 1, wherein the amount of primary surfactant blend ranges from 35 wt% to 82 wt% with respect to the total weight of the formulation.

3. The reconstitutable powder formulation as claimed in claim 1, wherein the amount of the secondary surfactant blend ranges from 0.5 wt% to 20 wt% with respect to the total weight of the formulation.

4. The reconstitutable powder formulation as claimed in claim1, wherein the sulfate-based surfactant is at least one selected from the group consisting of sodium lauryl sulfate.

5. The reconstitutable powder formulation as claimed in claim1, wherein the non-sulfate surfactant is at least one selected from the group consisting of Sodium Cocoyl Isthionate, sodium lauroyl isethionate, taurate, glutmate or a combination thereof.

6. The reconstitutable powder formulation as claimed in claim 1, wherein the sulfonated surfactant is C14-C18 alpha olefin sulfonate.

7. The reconstitutable powder formulation as claimed in claim 1, wherein the sulfonated surfactant in the secondary blend is C14-18 alpha olefin sulfonate and the amount of said alpha olefin sulfonate ranges from 5 wt% to 10 wt% of the total weight of the powder formulation.

8. The reconstitutable powder formulation as claimed in claim 1, wherein the non-sulfate surfactant in the secondary blend is sodium Cocoisothionate and its amount varies from 1 wt% to 10wt% with respect to the total weight of the formulation.

9. The reconstitutable powder formulation as claimed in claim 1, wherein the amount of sulfonated surfactant in a secondary blend of surfactant is always in excess of the amount of non-sulfated surfactant with respect to the total weight of the secondary surfactant blend.

10. The reconstitutable powder formulation as claimed in claim 1, wherein the cellulose derivative is at least one selected from the group consisting of sodium carboxymethyl cellulose, carboxy ethyl cellulose, hydroxyethyl cellulose, Hydroxy Propyl Methyl Cellulose (HPMC), and a combination thereof.

11. The reconstitutable powder formulation as claimed in claim 1, wherein the galactomannan derivative is selected from the group consisting of a guar derivative, carrageenan or combination thereof.

12. The reconstitutable powder formulation as claimed in claim 1, wherein the galactomannan derivative in the formulation is a nonionic hydroxypropyl guar.

13. The reconstitutable powder formulation as claimed in claim 12, wherein the average molecular weight of the a nonionic hydroxypropyl guar ranges from 1.1M to 1.6M.

14. The reconstitutable powder formulation as claimed in claim 1, wherein the amount of the cellulose derivative ranges from about 15% to 30wt% by weight with respect to the total weight of the formulation.

15. The reconstitutable powder formulation as claimed in claim 1, wherein the amount of galactomannan derivative ranges from 2 wt% to 10 wt% with respect to the total weight of the formulation.

16. The reconstitutable powder formulation as claimed in claim 1, wherein the ratio of amounts of cellulose derivative to galactomannan derivative with respect to total weight of the powder formulation ranges from 8:1 to 1:8.

17. The reconstitutable powder formulation as claimed in claim 1, wherein the ratio of the amount of cellulose derivative to galactomannan derivative is 4: 9.

18. The reconstitutable powder formulation as claimed in claim 1, wherein the total amount of the polysaccharide-based thickening system is in the range from 20 wt% to 40 wt% with respect to the total weight of the formulation.

19. The reconstitutable powder formulation as claimed in claim 1, wherein the stable reconstituted liquid formulation which is stable for a period ranging from 3 months 24 months, preferably from 6 months to 18 months.

20. The reconstitutable powder formulation as claimed in claim 1, wherein said formulation further comprising an anticaking agent.

21. The reconstitutable powder formulation as claimed in claim 19, wherein said anticaking agent is selected from the group consisting of precipitated silica, hydrated silica, carbonates, stearates of calcium and magnesium and combinations thereof.

22. The reconstitutable powder formulation as claimed in claim 19, wherein the amount of said anticaking agent in the formulation ranges from about 0.01wt% to about 5wt%.

23. The reconstitutable powder formulation as claimed in claim 1, wherein said composition further comprises at least one excipient selected from the group consisting of antimicrobial agent (0.001 to 3 wt%), chelating agent (0.001-2% by weight), buffering agent (0-5% by weight), coloring agent (0-0.5% by weight), fragrance (0.1%-8% by weight) and preservative (0.001-5% by weight).

24. A method of preparing a stable reconstituted liquid formulation using the powder formulation as claimed in claim 1 comprising:
(i) admixing water with the powder formulation as claimed in any of claims 1-23 in a ratio ranging from 4.5:90 to 4.5 : 150 in a container to obtain an admixture;
(ii) shaking the admixture in the container for a period ranging from 30sec to 120sec to obtain a stable reconstituted liquid formulation.

25. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the water is selected from the group consisting of tap water, bottled water, RO water, filtered water, potable water and demineralized water.

26. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the total dissolved solids (TDS) in the water ranges from 0 to 2000.

27. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the total chloride content in the water ranges from 0.002wt% to 2 wt%

28. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the resulting reconstitutable liquid formulation is stable for a period ranging from 1 to 24 months.

29. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the stable reconstitutable formulation is transparent.

30. The method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the stable reconstitutable formulation is translucent.

31. A method of preparing a stable reconstituted liquid formulation as claimed in claim 24, wherein the viscosity of the stable reconstitutable formulation ranges from 800 cps to 1600 cps.