Chromium Potassium Sulfate Dodecahydrate

【 Molecular formula 】 KCr(SO₄)₂.12H₂O

【 Molecular weight】 499.41

【 CAS NO.】7788-99-0

【 Character 】 Purple or purple red equiaxed octahedral crystals, easy to make large particles crystallization. Relative density: 1.826 (25 ° C). MP: 89 ° C. 10 crystalline waters are lost upon heating to 100 ° C and 12 crystalline waters are lost upon heating to 400 ° C to become anhydrous. Soluble in water, dilute acid, insoluble in alcohol. Dissolved in water as a purple red aqueous solution, when heated to 79 ° C becomes a green solution, after cooling a graded purple color. Easy to absorb moisture and is weathering in dry air.

【 Use 】Used as tanning, mordant and photographic fixative, etc.

【 Package】Packed in iron buckets lined with polyethylene plastic bags with a net weight of 50 kg per drum; Packed in plastic braided bags lined with polyethylene plastic bags, each net weighing 25 kg.

【 Notes 】Store in a cool, ventilated, dry room. Packaging to be sealed, care should be taken to protect from moisture and prevent weathering. Not to be co shipped with food, flammable items and acids. Keep out of rain and hard sun when transporting. Care should be taken to lightweight when unloading to prevent package breakage. On fire, it can be rescued with water, sandy soil, and a carbon dioxide fire retardant.

【 Executive criteria】 HG/T 2570-2009（2015）