Strontium chromate
Names
Other names
C.I. Pigment Yellow 32
Identifiers
ECHA InfoCard 100.029.220
EC Number
RTECS number
UNII
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
Appearance
yellow powder
Density
3.353 g/cm3
0.12 g/100 mL (15 °C)
Solubility
Soluble in dilute acids and ammonia
−5.1·10−6 cm3 /mol
Structure
monoclinic
Hazards
Lethal dose or concentration (LD, LC):
3118 mg/kg (rat, oral)
Related compounds
Magnesium chromate Barium chromate
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
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 .
Reactions
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
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
Chromates
Dichromates Related
A typical sample is shown for each name; a range of color-variations is commonly associated with each color-name.
