Calcium chromate

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Calcium Chromate
Calcium chromate.svg
Calcium chromate
Calcium chromate dihydrate.svg
Calcium chromate dihydrate
Names
IUPAC name
Calcium dioxido-dioxo-chromium
Other names
Calcium chromate (VI)
Calcium monochromate
Calcium Chrome Yellow
C. I. Pigment Yellow 33
Gelbin
Yellow Ultramarine
Identifiers
13765-19-0 YesY
ChemSpider 24471 YesY
EC Number 237-66-8
Jmol interactive 3D Image
PubChem 26264
RTECS number GB2750000
Properties
CaCrO4
Molar mass 156.072 g/mol
Appearance bright yellow powder
Density 3.12 g/cm3
Melting point 2,710 °C (4,910 °F; 2,980 K)
anhydrous
4.5 g/100 mL (0 °C)
2.25 g/100 mL (20 °C)
dihydrate
16.3 g/100mL (20 °C)
18.2 g/100mL (40 °C)
Solubility soluble in acid
practically insoluble in alcohol
Structure
monoclinic
Related compounds
Other anions
calcium dichromate
Other cations
Beryllium chromate
Magnesium chromate
Strontium chromate
Barium chromate
Radium chromate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Calcium chromate (CaCrO4) is a bright yellow solid. It normally occurs as the dihydrate.

Properties[edit]

Calcium chromate loses water at 200 °C. It reacts with organic matter or reducing agents to form chromium(III). The solid will react explosively with hydrazine. If mixed with boron and ignited, calcium chromate will burn violently.[1]

Uses[edit]

It is used as a pigment, a corrosion inhibitor, and in electroplating, photochemical processing, and industrial waste treatment.

References[edit]