Strontium chromate

Names
Other names C.I. Pigment Yellow 32 C.I. 77839
Identifiers
CAS Number	7789-06-2 Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.029.220
EC Number	232-142-6
PubChem CID	24599
RTECS number	GB3240000
UNII	2W214M3GS2 Y
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	203.614 g/mol
Appearance	yellow powder
Density	3.353 g/cm3
Solubility in water	0.12 g/100 mL (15 °C) 3 g/100 mL (100 °C)
Solubility	Soluble in dilute acids and ammonia
Magnetic susceptibility (χ)	−5.1·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	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). Infobox references

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 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, leaving the chromate or dichromate in solution.

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]

References[edit]