Strontium chromate

Last updated
Strontium chromate
Strontiumchromaat.png
Strontiumchromat.png
Names
Other names
C.I. Pigment Yellow 32
C.I. 77839
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.220 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 232-142-6
PubChem CID
RTECS number
  • GB3240000
UNII
UN number 3077 (STRONTIUM CHROMATE); 3288
  • InChI=1S/Cr.4O.Sr/q;;;2*-1;+2
    Key: NVKTUNLPFJHLCG-UHFFFAOYSA-N
  • [O-][Cr](=O)(=O)[O-].[Sr+2]
Properties
SrCrO4
Molar mass 203.614 g/mol
Appearanceyellow 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:
GHS-pictogram-exclam.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Danger
H302, H350, H410
P203, P264, P270, P273, P280, P301+P317, P318, P330, P391, P405, P501
Lethal dose or concentration (LD, LC):
3118 mg/kg (rat, oral)
Related compounds
Other cations
Magnesium chromate
Barium chromate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Strontium chromate is an inorganic compound with the formula SrCrO4.

Contents

Preparation

Strontium chromate is prepared from strontium chloride and sodium chromate, or from strontium carbonate and sodium dichromate.

Reactions

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

Health hazards

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

  1. 1 2 "Strontium yellow". CAMEO database . Museum of Fine Arts, Boston. 2022-06-06. Retrieved 2023-02-14.
  2. "Strontium chromate - Hazardous Agents | Haz-Map". haz-map.com. Retrieved 2025-03-03.
  3. "Strontium, section Regulations and Advisories" (PDF).
  4. PubChem. "Strontium Chromate". pubchem.ncbi.nlm.nih.gov. Retrieved 2025-03-03.