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