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%
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
新产品
此项目有
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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