Description:FORM 2 THE PATENTS ACT, 1970 (39 of 1970) THE PATENTS RULES, 2003 COMPLETE SPECIFICATION (Section 10 and Rule 13) “Synthesis of water soluble nanoparticles of Phosphorus through plant extract and DMSO (dimethyl sulfoxide) solvent” BIOFAC INPUTS PRIVATE LIMITED, Indian, Unit-I : Plot No. 74C, Anrich Industrial Estate IDA , Bollaram, Hyderabad -502325. Telangana State The following specification particularly describes and ascertains the nature of this invention and the manner in which it is to be performed FIELD OF INVENTION: The present invention relates to an inorganic metal nanoparticles. More particularly, the present invention relates to biosynthesis of nanoparticles of Phosphorus using phosphoric acid salt through (Azadirachta Indica) leaf plant extract and DMSO (Dimethyl Sulfoxide) solvent. BACKGROUND OF INVENTION: Phosphoric acid is a component of fertilizers (80% of total use), detergents, and many household cleaning products. Dilute solutions have a pleasing acid taste; thus, it's also used as a food additive, lending acidic properties to soft drinks and other prepared foods, and in water treatment products. One of the prior art means is disclosed in Green Synthesis and Characterization of Nano Phosphorus Fertilizer for Wheat Sagar Shashikant Patil* , S. S. Balpande, Mohammad Sajid and M. R. Pandao Soil Science and Agricultural Chemistry Section, College of Agriculture, Nagpur, Maharashtra, India, disclosed in “International Journal of Current Microbiology and Applied Sciences” ISSN: 2319-7706 Volume 9 Number 12 (2020). Nano Phosphorus fertilizer is prepared by chemical precipitation method and characterized with the help of Dynamic Light Scattering and Fourier Transform Infrared Spectroscopy (FTIR). The synthesised nano particles with Pluronic F-68 as a stabilizing agent showed a good size and stability in the suspension.A particle size of 145-172 nm, the Poly-dispersity Index in all the samples range from 0.274 to 0.328, indicating that these are midrange values and the particles remain in disperse form in all the samples. The zeta potential values of synthesized HAP NPs are found to be -47.13 mV revealing the better stability in aqueous suspension. Results and Discussion Characterization of nano P particles Average particle size and poly-dispersity index of the HAP NPs synthesized via wet chemical method, was evaluated of 8000 ppm of suspensions prepared in deionized Milli-Q water for two spraying schedules using Malvern Zeta Sizer, ZS-90 instrument. Dynamic light scattering (DLS) analyze the velocity of particle movement by measuring dynamic fluctuations of light scattering intensity, caused by the random motion of the particle. This technique yields an average particle size, poly-dispersity index and counts rate of the particle present in the solution(Murdock et al., 2008). Data presented in table 1 and fig. 1 and fig. 2 revealed that the prepared HAP NPs for two spray schedules showed a particle size of 145-172 nm. The PDI (Poly-dispersity Index) scale in all the samples range from 0.274 to 0.328 which indicate that it is the mid-range value and the particles remain in disperse form in all the samples. Surface charge of synthesized HAP NPs was measured following standard operating procedure using Malvern Zeta Sizer, ZS-90 instrument. Zeta potential measurement specifies the electro kinetic potential of a colloidal system (Garcia et al., 1997). Magnitude of the zeta potential is an indicator of repulsive forces between particles and therefore it can provide a good estimation of the suspension stability (Hunter, 1981). The larger zeta potential values represent lower degree of aggregation that leads to higher degree of stability of nanoparticles and smaller Z-averaged hydrodynamic diameter. At lower zeta values, the nanoparticles flocculate early and the stability in nanosuspension reduces. The common dividing line between unstable and stable suspensions is taken as +30 or -30 mV; particles having zeta potentials beyond these limits are generally considered as stable (Zak et al., 2011). The zeta potential values of synthesized HAP NPs at synthesis are found to be -47.13 mV as shown in fig. 3, revealing the better stability of synthesized HAP NPs in aqueous suspension. To determine the functional groups responsible for the synthesis of phosphorous NPs Fourier-transform infrared spectroscopy (FTIR) analysis was performed. FTIR analysis reveals the presence of –OH and P-O groups at 3435.12 and 1034.5 cm-1 , respectively. This result is in a good agreement with other works (Hong et al., 2009 and Zak et al., 2011). In conclusion the study on synthesis of Nano Pfertilizer using Hydroxyapatite (HAP)by chemical precipitation method given by Mateus et al., (2007), revealed that good size and stability of nano P fertilizer is achieved using Pluronic F-68 as a stabilizing agent. Another one prior art means is disclosed in Microbial Synthesis of Phosphorous Nanoparticle from Tri-Calcium Phosphate Using Aspergillus tubingensis TFR-5