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Merck
CN

60152

Chromium(III) potassium sulfate dodecahydrate

purum p.a., ≥98.5% (RT)

Synonym(s):

Chrome alum, Potassium chromium(III) sulfate dodecahydrate

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About This Item

Linear Formula:
CrK(SO4)2 · 12H2O
CAS Number:
7788-99-0
Molecular Weight:
499.40
NACRES:
NA.21
PubChem Substance ID:
329758772
UNSPSC Code:
12352302
EC Number:
233-401-6
MDL number:
MFCD00149917
Assay:
≥98.5% (RT)
Form:
crystals

Key Documents

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InChI key

ZFVHBEKVAITXHW-UHFFFAOYSA-J

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

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

grade

purum p.a.

assay

≥98.5% (RT)

form

crystals

mp

89 °C (lit.)

anion traces

chloride (Cl-): ≤200 mg/kg

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

Quality Level

200

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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.

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.

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H315,H319

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

wgk

WGK 3

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Certificates of Analysis (COA)

Lot/Batch Number
BCBS9609V
BCBS9608V

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Black Cr/α-Cr2O3 nanoparticles based solar absorbers.
Khamlich S, et al.
Physica B: Condensed Matter, 407(10), 1509-1512 (2012)
Eagleson M.
Concise Encyclopedia Chemistry, 887-887 (1994)
V M Chikov et al.
Izvestiia Akademii nauk SSSR. Seriia biologicheskaia, (2)(2), 294-297 (1989-03-01)
Gallocyanine-chrome alum-stained pig embryonic kidney cells have paramagnetic properties. They move under the influence of gradient magnetic field (magnetophoresis). The velocity of magnetophoresis is proportional to the content of nucleic acids in cells. This allows to estimate the content of
C A Redi et al.
Histochemistry, 84(1), 41-44 (1986-01-01)
In situ as well as extra situm cytochemical methods were used to investigate why the observed Feulgen-DNA value of sperm versus lymphocyte cells is lower than expected. After treatment with 5 N HCl, in situ experiments involving the GCA reaction
G M Lee et al.
The Histochemical journal, 17(11), 1221-1233 (1985-11-01)
Various pretreatments of metaphase spreads were examined to obtain optimal DNA labelling patterns while maintaining chromosome integrity during in situ hybridization procedures. Preparations of African green monkey (AGM) chromosomes fixed in methanol-acetic acid (CV-1 cell line) were treated by coating
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