Basic Information

Chemical Formula：CaCl₂·2H₂O
Molecular Weight：147.02
CAS Number：10035-04-8
Appearance：Colorless crystals in pure form; commercial products are typically white, off-white, or slightly yellowish crystals, appearing as granules or fused lumps.

Physicochemical Properties

Density: Relative density 1.835.

Melting Point: 782°C.

Boiling Point: Above 1600°C.

Solubility: Highly soluble in water with significant heat release; aqueous solution is neutral or slightly alkaline. Soluble in alcohol, insoluble in ether.

Hygroscopicity: Strongly hygroscopic; readily absorbs moisture from air and deliquesces.

Applications

Chemical Industry: Used in manufacturing antifreeze, refrigerants, fire extinguishing agents, adhesives, and for extracting metallic calcium.

Rubber Industry: Acts as a coagulant.

Starch Industry: Serves as a sizing agent for mixed starch pastes.

Metallurgical Industry: Used in non-ferrous metal smelting.

Wood Processing: Functions as a wood preservative.

Textile Industry: Used as a fabric flame retardant.

Analytical Chemistry: Employed as a chemical reagent.

Water Treatment: Serves as a boiler water treatment agent.

Food Industry: Used as a calcium fortifier, chelating agent, firming agent, and refrigerant for freezing.

Storage: Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly sealed.

Safety and Storage

Toxicity: Generally recognized as safe, but excessive intake may cause adverse reactions such as gastrointestinal irritation, with an LD50 of 4g/kg (rat, oral).

Storage: It should be stored in a cool, dry, well ventilated place, away from incompatible substances, and kept in a sealed container.

Inspection Report

Product Parameters