Strontium chromate
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| Other names
C.I. Pigment Yellow 32
C.I. 77839 | |
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3D model (JSmol)
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| ECHA InfoCard | 100.029.220 Edit this at Wikidata |
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PubChem CID
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| UNII |
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CompTox Dashboard (EPA)
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| Properties | |
| SrCrO4 | |
| Molar mass | 203.614 g/mol |
| Appearance | yellow powder |
| Density | 3.353 g/cm3 |
| 0.12 g/100 mL (15 °C) 3 g/100 mL (100 °C) | |
| Solubility | Soluble in dilute acids and ammonia |
| −5.1·10−6 cm3/mol | |
| Structure | |
| monoclinic | |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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3118 mg/kg (rat, oral) |
| Related compounds | |
Other cations
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Magnesium chromate Barium 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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Strontium chromate is an inorganic compound with the formula SrCrO4.
Preparation
[edit ]Strontium chromate is prepared from strontium chloride and sodium chromate, or from strontium carbonate and sodium dichromate.
Reactions
[edit ]Strontium chromate is approximately 30 times more soluble in water at 100 °C (212 °F) than at room temperature. Therefore, the yellow strontium chromate can be suspended in a hot solution of a soluble sulfate to digest until fully converted to the much less soluble and white strontium sulfate,[why? ] leaving the chromate or dichromate in solution.[citation needed ]
Uses
[edit ]- Corrosion inhibitor in pigments
- In electrochemical processes to control sulphate concentration of solutions
- Colorant in polyvinyl chloride resins
- Pyrotechnics[1]
- Aluminium flake coatings
- As an anti-corrosive primer for zinc, magnesium, aluminium, and alloys used in aircraft manufacture.
- As a pigment used in oil painting named strontium yellow.[1]
Health hazards
[edit ]Strontium chromate is a toxic and carcinogenic compound, primarily due to its hexavalent chromium (Cr6+) content. It is classified as a Group 1 carcinogen by the IARC (International Agency for Research on Cancer)—proven to cause lung cancer in humans.[2] [3] [4]
References
[edit ]- ^ a b "Strontium yellow". CAMEO database . Museum of Fine Arts, Boston. 2022年06月06日. Retrieved 2023年02月14日.
- ^ "Strontium chromate - Hazardous Agents | Haz-Map". haz-map.com. Retrieved 2025年03月03日.
- ^ https://www.atsdr.cdc.gov/toxprofiles/tp159-c8.pdf.
{{cite web}}: Missing or empty|title=(help) - ^ PubChem. "Strontium Chromate". pubchem.ncbi.nlm.nih.gov. Retrieved 2025年03月03日.
