Calcium chromate
 Calcium chromate
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 Calcium chromate dihydrate
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| Names | |
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| IUPAC name
Calcium dioxido-dioxo-chromium
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| Other names
Calcium chromate (VI)
Calcium monochromate Calcium Chrome Yellow C. I. Pigment Yellow 33 Gelbin Yellow Ultramarine | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.033.955 |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| 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
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calcium dichromate |
Other cations
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Beryllium chromate Magnesium chromate Strontium chromate Barium chromate Radium chromate |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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highly toxic, carcinogen, mutagen |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Calcium chromate (CaCrO4) is a bright yellow solid. It normally occurs as the dihydrate, although the very rarely natural (mineral) form, known as chromatite, is anhydrous.[1] Very toxic.
Properties
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.[2]
Uses
It is used as a pigment, a corrosion inhibitor, and in electroplating, photochemical processing, and industrial waste treatment.
References
- ^ http://www.mindat.org
- ^ Occupational Safety And Health Guideline For Calcium Chromate Archived August 8, 2007, at the Wayback Machine