二水硫酸钙

Description

Calcium Sulfate Dihydrate · CAS 10101-41-4 · CaSO4.2H2O. UNII 4846Q921YM. Melting Point: 100-150 °C; Solubility: 0.2 % at 77 °F (NIOSH, 2024); Solubility: (77 °F): 0.2%.

Identification

CAS Registry Number	10101-41-4
PubChem CID	24928
Molecular formula	CaSO4.2H2O
IUPAC name	calcium;sulfate;dihydrate
UNII (FDA)	4846Q921YM

Computed Descriptors

Molecular Weight	172.17
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	0
Exact Mass	171.9354499
Monoisotopic Mass	171.9354499
Topological Polar Surface Area	90.6
Heavy Atom Count	8
Formal Charge	0
Complexity	62.2

Physical & Chemical Properties

Melting Point	100-150 °C
Solubility	0.2 % at 77 °F (NIOSH, 2024)
Solubility	(77 °F): 0.2%
Density	2.32 g/cm³
Density	2.32
Vapor Pressure	0 mmHg (approx) (NIOSH, 2024)
Vapor Pressure	0 mmHg (approx)

Physical description & handling notes

• Gypsum appears as white or nearly white, odorless, crystalline solid.
• Dry Powder
• Dry Powder; Other Solid; CBI
• White or nearly white, odorless, crystalline solid;
• White to slightly yellowish-white odorless solid; [Merck Index] Colorless hygroscopic solid; [OECD SIDS: Calcium sulfate, dihydrate - 2003] White powder; [Sigma-Aldrich MSDS]
• CRYSTALLINE POWDER.

Regulatory Status

GHS notification summary	100% (278 / 278)

GHS Hazard Classification

GHS notification summary	100% (278 / 278)
Reported hazard statements	H335

Documented Uses

• Used to manufacture plasterboard and plaster of Paris; [Harber, p. 358]
• Pulp and Paper Processing [Category: Industry]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Working with Glues and Adhesives [Category: Other]
• Cement Producing [Category: Industry]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]

Synonyms

Calcium sulfate dihydrate; 10101-41-4; Satinite; Light spar; Satin spar; Annaline; Compactrol; Magnesia White; Native calcium sulfate; Precipitated calcium sulfate; Calcium sulfate, dihydrate; Alabaster; Gypsum fibrosum; Sulfuric acid, calcium salt, hydrate (1:1:2); Calcium sulphate dihydrate; Sulfuric acid, calcium(2+) salt, dihydrate

Frequently Asked Questions

What are the CAS number and molecular formula of Calcium Sulfate Dihydrate?

CAS 10101-41-4; molecular formula CaSO4.2H2O; molecular weight — g/mol.

What other names is Calcium Sulfate Dihydrate known by?

Calcium sulfate dihydrate, 10101-41-4, Satinite, Light spar, Satin spar, Annaline.

Is Calcium Sulfate Dihydrate classified as hazardous?

100% of GHS notifications report no hazard classification (278 of 278).

What are the key physical properties of Calcium Sulfate Dihydrate?

Melting Point: 100-150 °C; Solubility: 0.2 % at 77 °F (NIOSH, 2024); Solubility: (77 °F): 0.2%; Density: 2.32 g/cm³.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.