Calcium Sulfate Dihydrate (Gypsum) | Bulk Supplier, CAS 10101-41-4

Name: Gypsum (Calcium Sulfate Dihydrate)
Brand: RawSource

At a Glance

Material Family

Mineral Fillers & Pigments

Record Type

Pure compound

Primary Role

Thickening / Rheology

Functional Roles

Thickening / Rheology

Industries Served

Agriculture Coatings & Construction HI&I Cleaning

Applications & Use Cases

▸ Building products: Raw material for wallboard and plaster of Paris
▸ Cement: Set-retarding additive in Portland cement
▸ Agriculture: Soil amendment supplying calcium and sulfur
▸ Fillers: Filler and extender in paint, paper, and polymers
▸ Polishing: Component of polishing powders

Physical Properties

Physical Description

White to slightly yellowish-white odorless solid; Colorless hygroscopic solid; White powder

Melting Point

262 to 163 °C (Loses H2O)

Solubility

Solubility in water, g/100ml at 20 °C: 0.2 (very poor)

Density

2.32

Vapor Pressure

0 mmHg (approx)

Safety & Handling

Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

HS / Tariff Classification

Harmonized System (HS) Code — 6-digit international heading

2520 . 10

Chapter 25

Salt; sulphur; earths and stone; lime and cement

Heading 25.20

Internationally harmonized (WCO HS)

Subheading 2520.10

6-digit international code — national tariff line adds further digits

Chemical Identity

CAS Number

10101-41-4

Molecular Formula

CaH4O6S

Molecular Weight

172.17 g/mol

IUPAC Name

calcium;sulfate;dihydrate

PubChem CID

24928

InChI Key

PASHVRUKOFIRIK-UHFFFAOYSA-L

Synonyms & Trade Names

Calcium sulfate dihydrate Satinite Light spar Satin spar Annaline Compactrol Magnesia White Native calcium sulfate Precipitated calcium sulfate Sulfuric acid, calcium salt, hydrate (1:1:2) Calcium sulfate, dihydrate Alabaster Gypsum fibrosum Calcium sulphate dihydrate Sulfuric acid, calcium(2+) salt, dihydrate Sulfuric acid, calcium salt (1:1), dihydrate Calcium(II) sulfate, dihydrate (1:1:2) C.I. 77231

Full Description

Gypsum (CAS 10101-41-4), or calcium sulfate dihydrate, is a naturally occurring sulfate mineral. It is used to manufacture wallboard and plaster of Paris, as a set-control additive in Portland cement, as an agricultural soil amendment, and as a filler in paint, paper, and polymers.

Frequently Asked Questions

What is the main use of gypsum?

Gypsum (calcium sulfate dihydrate, CAS 10101-41-4) is used mainly to manufacture wallboard and plaster of Paris, as a set-control additive in Portland cement, as an agricultural soil amendment supplying calcium and sulfur, and as a filler in paint, paper, and polymers. RawSource supplies it in bulk to building-products, cement, and agricultural accounts.

What does gypsum do for soil?

As a soil amendment, gypsum supplies calcium and sulfur and is used to improve soil structure and address sodic conditions. RawSource supplies agricultural-grade gypsum in bulk; specify your application and any grade requirement on the RFQ for a matched quote with CoA.

What is another name for gypsum?

Gypsum is chemically calcium sulfate dihydrate (CAS 10101-41-4, CaSO4-2H2O); the dehydrated form is known as plaster of Paris. The CoA confirms the mineral identity and purity for a given lot.

What grades of gypsum does RawSource supply?

Gypsum is sold in grades tailored to building products, cement set-control, agriculture, and filler use, differing in particle size and purity. Specify your end use and any required fineness on the RFQ and we will confirm an available grade with CoA and SDS.

How is bulk gypsum packaged and quoted?

RawSource ships gypsum as a powder or granular solid in bulk bags and larger industrial packaging scaled to construction and agricultural volumes. Pricing depends on grade, volume, and freight; submit an RFQ with your quantity and ship-to for a current bulk quote.

Related Products

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.