Strontium chromate
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| Names | |
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| Other names
C.I. Pigment Yellow 32
C.I. 77839 | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.220 |
| EC Number |
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PubChem CID
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| RTECS number |
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| UNII | |
| UN number | 3077 (STRONTIUM CHROMATE); 3288 |
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 | |
| GHS labelling:[1] | |
  
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| Danger | |
| H302, H350, H410 | |
| P203, P264, P270, P273, P280, P301+P317, P318, P330, P391, P405, P501 | |
| 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. 2022-06-06. Retrieved 2023-02-14.
- ^ "Strontium chromate - Hazardous Agents | Haz-Map". haz-map.com. Retrieved 2025-03-03.
- ^ "Strontium, section Regulations and Advisories" (PDF).
- ^ PubChem. "Strontium Chromate". pubchem.ncbi.nlm.nih.gov. Retrieved 2025-03-03.
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