10101-53-8 Usage
Description
Chromic sulfate, also known as chromium(III) sulfate, is a compound of chromium and sulfate with a ratio of chromium (in the +3 oxidation state) to sulfate of 2:3. It is a dark green to violet crystalline material that is noncombustible and poses a potential hazard for environmental damage if released. Chromic sulfate is used in various applications across different industries due to its unique properties.
Uses
Used in Electrolysis:
Chromic sulfate is used as an electrolyte for obtaining pure chromium metal.
Used in Chrome Plating:
Chromic sulfate is used as a chrome plating solution for other metals, serving both protective and decorative purposes.
Used in Textile Industry:
Chromic sulfate is used as a mordant in the textile industry, which helps in dyeing and fixing colors onto fabrics.
Used in Leather Tanning:
The basic form of chromic sulfate, obtained by the reduction of sodium dichromate, is used in tanning leather.
Used in Paints and Inks:
Chromic sulfate is used to impart green color to paints, varnishes, inks, and ceramic glazes.
Used in Ceramics:
Chromic sulfate is used in the production of ceramic glazes.
Used in Catalysts:
Chromic sulfate is used as a catalyst in various chemical reactions.
Physical Properties:
Chromic sulfate exists in different forms, including reddish-brown hexagonal crystals, dark green amorphous substances (pentadecahydrate), and violet cubic crystals (octadecahydrate). The densities of these forms are 3.10 g/cm3 (anhydrous salt), 1.87 g/cm3 (pentadecahydrate), and 1.709 g/cm3 (octadecahydrate). The anhydrous sulfate is insoluble in water and acids, while the hydrate salts are soluble in water. The pentadecahydrate is insoluble in alcohol, but the octadecahydrate dissolves in alcohol.
Chemical Properties:
Chromic sulfate, with the chemical formula Cr2(SO4)3, is a peach-colored solid or red to violet, odorless powder that is insoluble in water and acids.
Preparation
Chromium(III) sulfate is prepared by treating chromium(III) hydroxide with sulfuric acid followed by crystallization:
2Cr(OH)3 + 3H2SO4 → Cr2(SO4)3 + 6H2O
Air & Water Reactions
Water soluble.
Reactivity Profile
Chromic sulfate has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.
Health Hazard
INHALATION: Corrosive action on mucous membranes. SKIN: May elicit an allergic reaction. Corrosive action on skin. Lesions confined to exposed parts.
Fire Hazard
Special Hazards of Combustion Products: Decomposes to chromic acid when heated.
Potential Exposure
This compound is used in green paints, inks, dyes, and ceramics
Shipping
UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required
Incompatibilities
This chemical has weak oxidizing and reducing properties. Keep away from strong oxidizers Chromic Sulfate 837 (perchlorates, peroxides, permanganates, chlorates, nitrates, chlorine, bromine, and fluorine). When heated this chemical decomposes to chromic acid.
Waste Disposal
Return to supplier where possible. Where this is not practical, the material should be encapsulated and buried in a specially designated chemical landfill.
Check Digit Verification of cas no
The CAS Registry Mumber 10101-53-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,1,0 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 10101-53:
(7*1)+(6*0)+(5*1)+(4*0)+(3*1)+(2*5)+(1*3)=28
28 % 10 = 8
So 10101-53-8 is a valid CAS Registry Number.
InChI:InChI=1/Cr.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+3;/p-2
