Description

Calcium Sulfate CAS NO 7778-18-9 is an inorganic compound widely recognized for its versatility and utility across numerous industrial sectors. Its primary value lies in its role as a desiccant, coagulant, and filler, offering a cost-effective and reliable solution for process and product enhancement. This material is essential for industries including construction, food and pharmaceuticals, agriculture, and chemical manufacturing, where consistent quality and performance are paramount.

Application

• Construction Industry: As a key component in gypsum plaster, wallboard (drywall), and cement to control setting time and add fire resistance.
• Food Industry (FCC Grade): Used as a firming agent (coagulant) in tofu production, a calcium source in fortified foods and beverages, and a dough conditioner.
• Pharmaceutical & Nutraceutical Excipient (USP/EP Grade): Serves as a diluent, desiccant, and calcium supplement in tablet and capsule formulations.
• Agriculture: Applied as a soil conditioner (land plaster) to improve soil structure, provide calcium and sulfur, and reduce salinity.
• Industrial Processes: Acts as a desiccant in gases and organic liquids, a filler in paints and paper, and a coagulant in wastewater treatment.
• Art & Dentistry: The basis for plaster of Paris used in molds, casts, and dental impressions.

Basic Information

Product Name	Calcium Sulfate
CAS No.	7778-18-9
Molecular Formula	CaSO4
Molecular Weight	136.14 g/mol
Synonyms	Gypsum; Anhydrite; Drierite®; Plaster of Paris; Calcium sulphate; Sulfuric acid calcium salt (1:1); Alabaster; Land plaster; Terra Alba; CI 77231
EINECS	231-900-3

Quality Control

We supply Calcium Sulfate in various grades, including Industrial, Food (FCC), and Pharmaceutical (USP/EP), each manufactured under a rigorous quality management system. Every batch is tested against strict specifications for purity, heavy metals, loss on drying, and other critical parameters. A Certificate of Analysis (COA) is provided with each shipment to ensure full traceability and compliance with your requirements.

Storage

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

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as CaSO4)	≥ 98.0%
Loss on Drying	≤ 1.5%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Water-soluble Substances	≤ 0.2%
pH (5% slurry)	5.0 - 8.0

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