Calcium sulfate

• CAS: 7778-18-9
• Catalog Number: ACM7778189
• Category: Metal & Ceramic Materials
• Molecular Weight: 136.14
• Molecular Formula: CaO4S
• 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.]
• Synonyms: Anhydrite
• 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
• Melting Point: 1450 °C
• Density: 2.9 g/cm³
• Solubility: Soluble in water
• Appearance: White powder
• Application: Calcium sulfate serves multiple purposes across various industries due to its versatile properties. Available as both anhydrous and dihydrate forms, it is derived through processes involving gypsum. In its anhydrous form, it contains about 29% calcium, while the dihydrate form contains approximately 23%. In the food industry, calcium sulfate is commonly used as a filler and in baking powder standardization. It acts as a firming agent in canned vegetables such as potatoes and carrots, and enhances dough quality by providing calcium ions which prevent stickiness and improve bread texture. Additionally, it helps in producing dryness and stiffness in soft-serve ice cream and forms dessert gels when reacting with alginates. Its role as a calcium source makes it integral in food enrichment processes. Beyond food applications, calcium sulfate is utilized in cements, tiles, and plaster, serves as a soil conditioner, and is involved in the production of paints, dyes, and polishes. It is also a byproduct of numerous chemical reactions, further broadening its industrial utility. Notably, calcium sulfate is used in traditional blackboard chalk and is recognized as a calcium salt with a distinct grayish-white, dense powder appearance.
• Storage: Room Temperature
• Assay: 0.98
• 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].
• Complexity: 62.2
• Covalently-Bonded Unit Count: 2
• Decomposition: 1450 °C
• EC Number: 231-900-3;231-900-3
• Exact Mass: 135.9143205
• Formal Charge: 0
• H-Bond Acceptor: 4
• H-Bond Donor: 0
• Heavy Atom Count: 6
• ICSC Number: 1589
• MDL Number: MFCD00010912
• Monoisotopic Mass: 135.9143205
• Odor: Odorless
• 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/
• Packaging: 1 kg
• Refractive Index: INDEX OF REFRACTION: 1.569, 1.575, 1.613
• Rotatable Bond Count: 0
• Stability: Stable. Incompatible with aluminium, strong acids.
• Storage Conditions: Store at RT.
• Topological Polar Surface Area: 88.6 Ų
• UNII: E934B3V59H
• Vapor Pressure: 0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx)

Custom Q&A

What is the molecular formula of calcium sulfate?

The molecular formula of calcium sulfate is CaSO4.

What is the molecular weight of calcium sulfate?

The molecular weight of calcium sulfate is 136.14 g/mol.

What are some synonyms for calcium sulfate?

Some synonyms for calcium sulfate are Gypsum, Drierite, and Anhydrous gypsum.

Is calcium sulfate a calcium salt?

Yes, calcium sulfate is a calcium salt and an inorganic calcium salt.

What is the density of calcium sulfate?

The density of calcium sulfate is 2.96 g/cm3.

What is the IUPAC name of calcium sulfate?

The IUPAC name of calcium sulfate is calcium;sulfate.

What is the InChIKey of calcium sulfate?

The InChIKey of calcium sulfate is OSGAYBCDTDRGGQ-UHFFFAOYSA-L.

What is the canonical SMILES of calcium sulfate?

The canonical SMILES of calcium sulfate is [O-]S(=O)(=O)[O-].[Ca+2].

What is the CAS number of calcium sulfate?

The CAS number of calcium sulfate is 7778-18-9.

What is the UNII of calcium sulfate?

The UNII of calcium sulfate is E934B3V59H.