Description

Calcium Sulfate Hemihydrate is a high-purity, fine white powder widely recognized for its unique setting properties when mixed with water. This compound is essential as a key precursor for producing gypsum plaster and a versatile functional additive across multiple industries. It is primarily utilized in the construction, food, pharmaceutical, and dental sectors for its binding, drying, and rheological control capabilities. Our supply ensures consistent quality and reliable performance for industrial formulations.

Application

• Construction & Building Materials: Primary raw material for manufacturing gypsum plaster, wallboard (drywall), joint compounds, and stucco.
• Food Industry (FCC Grade): Used as a firming agent, dough conditioner, calcium fortifier, and desiccant in various food products.
• Pharmaceutical & Dental: Serves as an inert filler and desiccant in tablet formulations and is the base material for dental plasters and molds.
• Industrial Additive: Acts as a coagulant, drying agent, and viscosity modifier in paints, coatings, and other chemical processes.
• Agriculture: Utilized as a soil conditioner to improve structure and provide a source of calcium and sulfur.
• Art & Craft: Base material for pottery molds, sculpture casting, and other artistic plasters.

Basic Information

Product Name	Calcium Sulfate Hemihydrate
CAS No.	10034-76-1
Molecular Formula	CaSO4·0.5H2O
Molecular Weight	145.15 g/mol
Synonyms	Plaster of Paris; Dried Calcium Sulfate; Calcium Sulphate Hemihydrate; Gypsum Hemihydrate; Bassanite; 2CaSO4·H2O; Calcined Gypsum; Stucco
EINECS	231-900-3

Quality Control

Our Calcium Sulfate Hemihydrate is manufactured under a strict quality management system. Products are tested against relevant industry specifications, including potential compliance with FCC for food grade and USP for pharmaceutical applications. Certificates of Analysis (COA) documenting purity, heavy metals, and physical parameters are available for every batch upon request to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent caking and degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Fine white to off-white powder
Identification (IR)	Conforms
Assay (as CaSO4·0.5H2O)	≥ 98.0 %
Loss on Drying	5.0 - 7.0 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Iron (Fe)	≤ 0.01 %
Chloride (Cl)	≤ 0.05 %
Sieve Residue	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.