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Merck
CN

31250

铬酸钾

puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5%

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关于此项目

线性分子式:
K2CrO4
化学文摘社编号:
分子量:
194.19
UNSPSC Code:
41116107
PubChem Substance ID:
EC Number:
232-140-5
MDL number:
Assay:
≥99.5%
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InChI key

XMXNVYPJWBTAHN-UHFFFAOYSA-N

InChI

1S/Cr.2K.4O/q;2*+1;;;2*-1

SMILES string

[K+].[K+].[O-][Cr]([O-])(=O)=O

grade

ACS reagent, puriss. p.a.

agency

reag. Ph. Eur.

vapor density

6.7 (vs air)

assay

≥99.5%

impurities

≤0.005% in water insoluble matters

pH

8.6-9.8 (20 °C, 5%)

mp

971 °C (lit.)

anion traces

chloride (Cl-): ≤10 mg/kg, sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤50 mg/kg, Fe: ≤20 mg/kg, Na: ≤200 mg/kg, Pb: ≤50 mg/kg

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General description

Potassium chromate (K2CrO4) is the potassium salt having morphological features similar to potassium sulfate (isostructural). Its crystals exhibit rhombic crystal system. It can be manufactured by reacting potassium dichromate with potassium hydroxide. It has been reported to crystallize in orthorhombic space group. Production of potassium chromat by a new reaction system of KOH-KNO3-H2O (binary submolten salt system) has been proposed.

signalword

Danger

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

存储类别

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

flash_point_f

Not applicable

flash_point_c

Not applicable

法规信息

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分析证书(COA)

Lot/Batch Number

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Redetermination of the structures of potassium sulphate and potassium chromate: the effect of electrostatic crystal forces upon observed bond lengths.
McGinnety JA.
Acta Crystallographica Section B, Structural Science, 28(9), 2845-2852 (1972)
Eagleson M.
Concise Encyclopedia Chemistry, 881-881 (1994)
Comparative Study of Factors Influencing the Action of Corrosion Inhmitors for Mild Steel in Neutral Solution: II. Potassium Chromate.
Mercer AD and Jenkins IR.
British Corrosion Journal, 3(3), 130-135 (1968)
A new method of potassium chromate production from chromite and KOH-KNO3-H2O binary submolten salt system.
Sun Z, et al.
AIChE Journal, 55(10), 2646-2656 (2009)
Subhendra N Mattagajasingh et al.
Journal of applied toxicology : JAT, 28(8), 987-997 (2008-07-11)
Hexavalent chromium [Cr(VI)] compounds are Group-I human carcinogens. Cr(VI)-induced DNA-protein crosslinks (DPCs) have been implicated in the mutagenic and carcinogenic effects of Cr(VI). Although multiple mechanisms have been suggested for Cr(VI)-induced DNA-protein crosslinking, the mechanism of formation of DNA-protein crosslinks

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