Functional Roles
Industries Served
Physical Properties
physical_description
White to slightly yellowish-white odorless solid; [Merck Index] Colorless hygroscopic solid; [OECD SIDS: Calcium sulfate, dihydrate - 2003] White powder; [Sigma-Aldrich MSDS]
melting_point
262 to 325 u00b0F (Loses H2O) (NIOSH, 2024)
solubility
Solubility in water, g/100ml at 20 u00b0C: 0.2 (very poor)
density
2.32 (NIOSH, 2024) - Denser than water; will sink
vapor_pressure
0 mmHg (approx) (NIOSH, 2024)
GHS / SDS Safety
Warning
Irritant
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- Reported as not meeting GHS hazard criteria by 40 of 40 companies. For more detailed information, please visit ECHA C&L website.
- Not Classified
- Reported as not meeting GHS hazard criteria by 278 of 278 companies. For more detailed information, please visit ECHA C&L website.
Chemical Identity
| CAS Number | 10101-41-4 |
| IUPAC Name | calcium;sulfate;dihydrate |
| InChI Key | PASHVRUKOFIRIK-UHFFFAOYSA-L |
| PubChem CID | 24928 |
Synonyms & Trade Names
Full Description
Gypsum (Calcium Sulfate Dihydrate) is a naturally occurring mineral sulfate compound that serves as a filling and extending agent in industrial applications. This low-solubility solid material is utilized across agriculture, coatings and construction, and household, industrial, and institutional (HI&I) cleaning sectors for its functional properties as a specialty additive. With a density of 2.32 g/cm³ and very poor water solubility (0.2 g/100ml at 20°C), gypsum provides effective bulk and performance enhancement in formulated products.