Product Name
Calcium sulfate
Category
Metal & Ceramic Materials
Description
Calcium sulfate appears as odorless, white powder or colorless, crystalline solid. Crystals sometimes have a blue, gray or reddish tinge or can be brick red. Density: 2.96 g cm-3.;DryPowder; DryPowder, OtherSolid; DryPowder, PelletsLargeCrystals; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid; WetSolid;Fine, white to slightly yellowish-white odourless powder;WHITE HYGROSCOPIC POWDER OR CRYSTALLINE POWDER.;Odorless, white powder or colorless, crystalline solid.;Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
IUPAC Name
Calcium;sulfate
Canonical SMILES
[O-]S(=O)(=O)[O-].[Ca+2]
InChI
InChI=1S/Ca.H₂O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChI Key
OSGAYBCDTDRGGQ-UHFFFAOYSA-L
Boiling Point
Decomposes (NIOSH, 2016);Decomposes;Decomposes
Solubility
Soluble in water
Color/Form
NATURAL ANHYDRITE CRYSTALS ARE COLORLESS, RHOMBIC OR MONOCLINIC;NATURAL ANHYDRITE CRYSTALS ARE ORTHORHOMBIC, COLOR VARIES (WHITE WITH BLUE, GRAY OR REDDISH TINGE, OR BRICK RED);INSOL ANHYDRITE HAS SAME CRYSTAL STRUCTURE AS MINERAL ANHYDRITE;SOL ANHYDRITE IS OBTAINED IN GRANULAR OR POWDER FORM;SOL ANHYDRITE CRYSTALS ARE COLORLESS, HEXAGONAL OR TRICLINIC;PURE ANHYDROUS CALCIUM SULFATE EXISTS IN FORM OF WHITE POWDER OR CRYSTALS;White powder or colorless, crystalline solid [Note: May have blue, gray, or reddish tinge].
Covalently-Bonded Unit Count
2
EC Number
231-900-3;231-900-3
Monoisotopic Mass
135.9143205
Other Experimental
POSSESSES HIGH AFFINITY FOR WATER & WILL ABSORB 6.6% OF ITS WT OF WATER FORMING STABLE HEMIHYDRATE /SOL ANHYDRITE/;LOSES 1/2 H₂O AT 163 °C /HALF-HYDRATE/;TASTELESS; SETS TO HARD MASS WHEN MIXED WITH WATER /HEMIHYDRATE/;NEITHER ANHYDROUS NOR DIHYDRATE FORMS CAN SET WITH WATER;WHITE POWDER /HALF-HYDRATE/;COLORLESS MONOCLINIC CRYSTALS /DIHYDRATE/;LUMPS OR POWDER /DIHYDRATE/;0.3 G/100 CC H₂O AT 20 °C; SOL IN ACIDS, AMMONIUM SALTS & GLYCERIN; SLIGHTLY SOL IN HOT WATER /HALF-HYDRATE/;VERY SOL IN GLYCEROL; PRACTICALLY INSOL IN MOST ORG SOLVENTS /DIHYDRATE/;SOL IN SODIUM THIOSULFATE; INDEX OF REFRACTION: 1.505, 1.548; DENSITY 2.61; MP ABOVE 200 °C WITH TRANSITION TO RHOMBIC CRYSTALS /SOL ANHYDRITE/;INDEX OF REFRACTION: 1.521, 1.523, 1.530; LOSES 1/2 H₂O AT 128 °C & 2 H₂O AT 163 °C /DIHYDRATE/;Solubility in water at 20 °C, g/100 g solution: 0.21 /Dihydrate/;Solubility in water at 20 °C, g/100 g solution: 0.67 /Hemihydrate, alpha-form/;Solubility in water at 20 °C, g/100 g solution: 0.88 /Hemihydrate, beta-form/;Solubility in water at 20 °C, g/100 g solution: 0.27 /Anhydrite/
Refractive Index
INDEX OF REFRACTION: 1.569, 1.575, 1.613
Stability
Stable. Incompatible with aluminium, strong acids.
Storage Conditions
Store at RT.
Topological Polar Surface Area
88.6 Ų
Vapor Pressure
0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx)
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