Chromium(III) potassium sulfate dodecahydrate

SIGALD/60152 - purum p.a., ≥98.5% (RT)

Synonym: Chrome alum; Potassium chromium(III) sulfate dodecahydrate

CAS Number: 7788-99-0
Empirical Formula (Hill Notation): CrKO₈S₂ · 12H₂O
Molecular Weight: 499.40
EC Number: 233-401-6
MDL Number: MFCD00149917
Linear Formula: CrK(SO₄)₂ · 12H₂O
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-60152-100G	100 g	$68.20 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

anion traces	chloride (Cl^-): ≤200 mg/kg
assay	≥98.5% (RT)
cation traces	Ca: ≤500 mg/kg
	Cd: ≤50 mg/kg
	Co: ≤50 mg/kg
	Cu: ≤50 mg/kg
	Fe: ≤200 mg/kg
	Na: ≤1000 mg/kg
	Ni: ≤50 mg/kg
	Pb: ≤50 mg/kg
	Zn: ≤50 mg/kg
form	crystals
grade	purum p.a.
InChI	1S/Cr.K.2H2O4S.12H2O/c;;21-5(2,3)4;;;;;;;;;;;;/h;;2(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4
InChI key	ZFVHBEKVAITXHW-UHFFFAOYSA-J
mp	89 °C (lit.)
Quality Level	200
SMILES string	O.O.O.O.O.O.O.O.O.O.O.O.[K+].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O

Application:	Chromium(III) potassium sulfate dodecahydrate (KCr(SO₄)₂.12H₂O) may be used for coating the slides for microscopic studies on Periplaneta americana. It may be used in the preparation of quasi-monodisperse spherical core-shell particles of Cr/α-Cr₂O₃.
General description:	Chromium(III) potassium sulfate dodecahydrate (Potassium chromium(III) sulfate dodecahydrate, Chrome alum) is a violet colored solid. It has been synthesized by reacting sulfur dioxide with potassium dichromate (diisolved in sulfuric acid) at -38°C. It is widely used chemical in dyeing and textile industry.

Symbol	GHS07
Signal word	Warning
Hazard statements	H315 - H319
Precautionary statements	P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
RIDADR	NONH for all modes of transport
WGK Germany	WGK 2

Purity	≥98.5% (RT)
mp	89 °C (lit.)
UNSPSC	12352300

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