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Strontium chromate

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Strontium chromate
Names
Other names C.I. Pigment Yellow 32
C.I. 77839
Identifiers
CAS Number
3D model (JSmol)
ECHA InfoCard 100.029.220 Edit this at Wikidata
EC Number
  • 232-142-6
PubChem CID
RTECS number
  • GB3240000
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/Cr.4O.Sr/q;;;2*-1;+2Key: NVKTUNLPFJHLCG-UHFFFAOYSA-N
SMILES
  • (=O)(=O).
Properties
Chemical formula SrCrO4
Molar mass 203.614 g/mol
Appearance yellow powder
Density 3.353 g/cm
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 cm/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 , 100 kPa). Infobox references
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
  • 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.

References

  1. ^ "Strontium yellow". CAMEO database. Museum of Fine Arts, Boston. 2022-06-06. Retrieved 2023-02-14.
Strontium compounds
Chromates and dichromates
Chromates
Chlorochromates
Chromate esters
Dichromates
Related
Shades of yellow
AmberApricotArylide yellowAureolinBeigeBuffCanaryChampagneChartreuseChrome yellow
          
CitronCitrineCosmic latteCreamDark goldenrodEcruFlaxGambogeGoldGold (metallic)
          
GoldenrodHarvest goldIcterineIvoryJasmineJonquilKhakiLemon chiffonLemon-limeLight yellow
          
LionMaizeMarigoldMikado yellowMindaroMustardNaples yellowNavajo whiteOld goldPapaya whip
          
Peach-yellowPearSaffronSchool bus yellowSelective yellowStil de grain yellowStrawSunglowSunsetVanilla
          
WheatYellow
  
A typical sample is shown for each name; a range of color-variations is commonly associated with each color-name.
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