Shaanxi Shangnan County Dongzheng Chemical Co., Ltd. 
1. Appearance
Purple or purplish-red cubic octahedral crystals, easily forming into large-grained crystals.
2.Physical and Chemical Properties
It has a relative density of 1.826 (25°C) and a melting point of 89°C. When heated to 100°C, it loses 10 water molecules of crystallization, and upon heating to 400°C, it loses all 12 water molecules to form the anhydrous compound. It is highly soluble in water and dilute acids but insoluble in alcohol. The aqueous solution appears purple-red, turning green when heated to 70°C, and gradually reverting to purple upon cooling. The compound is hygroscopic and prone to efflorescence in dry air.
3. Application
It is employed as a leather tanning agent, dye mordant, photographic fixing agent, and other purposes.
4. Product Information
English Name: Chromium potassium sulfate
CAS Number: 7788-99-0
Molecular Formula: KCr(SO4)2•12H2O
5. Product Categories and Quality Standards
Standard: HG/T 2570-2009
Quality Index | Specification | |
First Grade | Qualified Grade | |
Potassium Chromium Sulfate (as CrK(SO₄)₂·12H₂O) w/% ≥ | 99.00 | 98.00 |
| Water Insoluble Matter w/%≤ | 0.003 | 0.005 |
Chloride (as Cl) w/%≤ | 0.002 | 0.003 |
| Iron (as Fe) w/% ≤ | 0.005 | 0.010 |
Hexavalent Chromium (as Cr⁶⁺) w/% ≤ | 0.0003 | |
6.Packaging
25kg paper-plastic composite bags, or customer specifications.
7. Storage
Store in a cool, dry, and well-ventilated warehouse and keep the package tightly sealed to prevent moisture and weathering. Do not store or transport together with edible goods or flammable materials.
