Phosphoric acid CAS 7664-38-2 
Usage:
Mainly used in phosphate industry, electroplating, polishing industry, sugar industry, compound fertilizer, etc.
Used as an acidifier, yeast nutrient, etc. in the food industry
Mainly used as a catalyst for ethylene hydration to produce ethanol, high-purity phosphate, pharmaceutical manufacturing, and chemical reagents.
Mainly used for the production of chemical fertilizers, detergents, food and feed additives, flame retardants, and various phosphates