Barium chromate

Barium chromate
Barium chromate
Identifiers
CAS number 10294-40-3 YesY
ChemSpider 23481 YesY
RTECS number CQ876000
Jmol-3D images Image 1
Properties
Molecular formula BaCrO4
Molar mass 253.37 g/mol
Appearance yellow powder
Density 4.498 g/cm3
Melting point

decomposes

Solubility in water 0.0002775 g/100 mL (20 °C)
Hazards
MSDS External MSDS
EU classification Harmful (Xn)
R-phrases R20/22
S-phrases (S2), S28
NFPA 704
NFPA 704.svg
0
3
3
 YesY chromate (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Barium chromate is a fine light yellow powder with the formula BaCrO4. The chromium occurs in the +6 oxidation state. It is an oxidizing agent, and produces a green flame when heated, the result of barium ions.

Contents

Reactions

It is very insoluble in water, but is soluble in acids:

2 BaCrO4 + 2 H+   →   2 Ba2+ + Cr2O72- + H2O

Ksp = [Ba2+][CrO42-] = 2.1 x 10-10

Uses

There are a few uses of barium chromate:

Safety

Barium chromate is toxic. Chromates, when pulverized and inhaled, are carcinogens.

References


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Look at other dictionaries:

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