[Class : 1] Chemicals Used In The Cleaning, Etching And Plating Of Metals And Non Metal Substrates; Chemicals Used In The Production Of Printed Circuit Boards And Semiconductor Materials; Industrial Chemicals; Chemical Preparations For Scientific Use (Other Than For Medical Or Veterinary Use); Chemicals For Laboratory Analyses (Other Than For Medical Or Veterinary Use); Chemical Reagents (Other Than For Medical Or Veterinary Use); Compositions For Chemically Modifying Metal And Nonmetal Products; Chemical Used In Activating, Acidification, Coating, Drying, Retouching And Altering Metal And Nonmetal Products; Chemicals Used For Separating Chromium Compounds From Aqueous Solutions.