CAS 7788-99-0 Chromium(III) potassium sulfate dodecahydrate

Synonyms

T987; 7788-99-0; Potassium chromium alum dodecahydrate; potassium chromium(3+) disulfate dodecahydrate; Chrome alum (dodecahydrate); ACMC-20alga; CTK3J2247; LS-53444; MFCD00149917; FT-0623789;

IUPAC Name

potassium;chromium(3+);disulfate;dodecahydrate;

Molecular Weight

499.386g/mol

Molecular Formula

CrH24KO20S2;

Canonical SMILES

O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[K+].[Cr+3];

InChI

InChI=1S/Cr.K.2H₂O4S.12H₂O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4;

InChI Key

ZFVHBEKVAITXHW-UHFFFAOYSA-J;

Complexity

62.2

Covalently-Bonded Unit Count

EC Number

616-539-5

Exact Mass

498.934g/mol

H-Bond Acceptor

H-Bond Donor

Heavy Atom Count

Monoisotopic Mass

498.934g/mol

Topological Polar Surface Area

189A^2

UNII

H54D055WX6

Application

Chromium(III) potassium sulfate dodecahydrate, also known as chrome alum, is a versatile chemical compound that serves multiple purposes across various industries. Characterized by its deep violet-red crystals, this compound is notably used in the preparation of chromium standard solutions, essential for accurate analytical measurements. In the field of materials science, it acts as a precursor in synthesizing metal-organic frameworks, such as the terephthalate structure MIL-101 (Cr). Furthermore, it plays a significant role in the dyeing and textile industry due to its unique properties. In addition to these applications, it facilitates the dissolution of gelatin in diverse studies and serves as a starting material for the synthesis of quasi-monodisperse spherical core-shell particles, which are valuable as solar absorbers. This compound is synthesized by reacting sulfur dioxide with potassium dichromate dissolved in sulfuric acid at -38°C, showcasing its intricate production process.

February 27, 2025

Excellent Quality for Scientific Use!

The chromium(III) potassium sulfate dodecahydrate from Alfa Chemistry proved invaluable in preparing metal-organic frameworks. Easy to dissolve and work with, its deep violet hue is a visual confirmation of purity, enhancing my research efficiency.