Cream of tartar Formula KHC4H4O6 Structure Property: Colorless crystals or white crystal powder with sweet and sour taste, sparingly soluble in water, freely soluble in dilute mineral acid, alkaline solution or borax solution and insoluble in acetic acid or ethanol, relative density 1.984. Packing and storage: 25KG net in Kraft/Plastic Bag lined with PE bag. Kept air tightly in a light-proof, dry and cool place. Application: Served as capacity analytical reagent, buffer and reducing agent, also as leavening agent in food industry. Specification data: See the table below. Assay: 99.65% Heavy metals: 0.002% max Arsenics: 0.0003% max Mesh size: 80 ¿c 100mesh 25kg net each .