Strontium chromate

Strontium chromate
	Sample of strontium chromate
Names
	Other names C.I. Pigment Yellow 32; C.I. 77839;
Identifiers
CAS Number	7789-06-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	23001;
ECHA InfoCard	100.029.220
EC Number	232-142-6;
PubChem CID	24599;
RTECS number	GB3240000;
UNII	2W214M3GS2 ;
UN number	3288
CompTox Dashboard (EPA)	DTXSID70872832 ;
	InChI InChI=1S/Cr.4O.Sr/q;;;2*-1;+2 Key: NVKTUNLPFJHLCG-UHFFFAOYSA-N;
	SMILES [O-][Cr](=O)(=O)[O-].[Sr+2];
Properties
Chemical formula	SrCrO4
Molar mass	203.61 g·mol−1
Appearance	yellow powder
Density	3.895 g/cm3
Solubility in water	0.12 g/100 mL (15 °C (59 °F)); 3 g/100 mL (100 °C (212 °F));
Solubility	Soluble in dilute acids and ammonia
Magnetic susceptibility (χ)	−5.1×10−6 cm3/mol
Structure
Crystal structure	monoclinic
Space group	P21/c
Point group	2/m
Lattice constant	a = 7.504 Å, b = 6.842 Å, c = 8.729 Å α = 53.477°, β = 90°, γ = 90°
Lattice volume (V)	360.142 Å3
Formula units (Z)	4
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H317, H330, H335, H341, H350, H361, H410
Precautionary statements	P201, P202, P260, P264, P270, P271, P272, P273, P280, P284, P301+P312+P330, P302+P352, P304+P340+P310, P308+P313, P333+P313, P362+P364, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)	4 0 0
Threshold limit value (TLV)	0.0002 mg/m3 (TWA), 0.0005 mg/m3 (Skin) (STEL)
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	811 mg/kg (rat, oral)
LC50 (median concentration)	0.27–0.51 mg/L (Rat, 4h)
	NIOSH (US health exposure limits):
PEL (Permissible)	0.1 mg/m3
REL (Recommended)	0.0002 mg/m3 (TWA)
IDLH (Immediate danger)	15 mg/m3
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). Infobox references

Strontium chromate is an inorganic compound with the formula SrCrO₄.

Preparation

Strontium chromate is prepared from strontium chloride and sodium chromate, or from strontium carbonate and sodium dichromate.^{[citation needed]}

Uses

Corrosion inhibitor in pigments.
In electrochemical processes to control sulfate concentration of solutions.
Colorant in polyvinyl chloride resins.
Pyrotechnics.^[4]
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.^[4]

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 International Agency for Research on Cancer (IARC) which indicates that it is considered to be proven to cause cancer in humans, particularly lung cancer.^[5]^[6]

References

1 2 3 4 5 6 "SDS - Strontium chromate". documents.thermofisher.com. ThermoFisher Scientific. 24 December 2025. pp. 3–5. Retrieved 14 June 2026.
↑ "Materials Project - SrCrO₄". legacy.materialsproject.org. Materials Project. Retrieved 14 June 2026.
↑ "TCI - Strontium chromate". www.tcichemicals.com. Tokyo Chemical Industry Co. Retrieved 14 June 2026.
1 2 "Strontium yellow". cameo.mfa.org. 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 - Regulations and Advisories" (PDF). www.atsdr.cdc.gov. US Center for Disease Control - Agency for Toxic Substances and Disease Registry. p. 257.

[FisherSDS-1] 1 2 3 4 5 6 "SDS - Strontium chromate". documents.thermofisher.com. ThermoFisher Scientific. 24 December 2025. pp. 3–5. Retrieved 14 June 2026.

[2] "Materials Project - SrCrO₄". legacy.materialsproject.org. Materials Project. Retrieved 14 June 2026.

[TCI-3] "TCI - Strontium chromate". www.tcichemicals.com. Tokyo Chemical Industry Co. Retrieved 14 June 2026.

[CAMEO-4] 1 2 "Strontium yellow". cameo.mfa.org. Museum of Fine Arts, Boston. 2022-06-06. Retrieved 2023-02-14.

[5] "Strontium chromate - Hazardous Agents | Haz-Map". haz-map.com. Retrieved 2025-03-03.

[6] "Strontium - Regulations and Advisories" (PDF). www.atsdr.cdc.gov. US Center for Disease Control - Agency for Toxic Substances and Disease Registry. p. 257.

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