Calcium Sulfate 2-Hydrate, Calcium Sulfate Dihydrate, C.I.Pigment White 25, 10101-41-4 

Calcium Sulfate 2-Hydrate, Calcium Sulfate Dihydrate, C.I.Pigment White 25, 10101-41-4 

• Chemical Formula: CaSO₄·2H₂O

• Molecular Weight: 172.17 g/mol

• CAS Number: 10101-41-4

• Appearance: White crystalline powder

• Density: 2.32 g/cm³

• Melting Point: 1450°C

• Solubility: Highly soluble in water

Uses

• Agriculture: Used as a soil conditioner.

• Construction: Used in the production of plaster, drywall, and cement.

• Industrial Applications: Used in the production of glass, ceramics, and paint.

• Food Industry: Used as a food additive.

• Chemical Industry: Used in various chemical reactions.

Other Names

• Gypsum

• Plaster of Paris

• Drierite

CAS: 10101-41-4

Molecular Formula: CaSO4·2H2O

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	Xn - Harmful
Risk Codes	R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S24/25 - Avoid contact with skin and eyes.
WGK Germany	1
RTECS	EW4150000
TSCA	Yes
HS Code	28332990
Toxicity	LD50 orally in Rabbit: > 10000 mg/kg

Upstream Downstream Industry

Nature

colorless monoclinic crystalline powder. The relative density was 2. 32. A hemihydrate was formed by losing 1-5H2 0 at 128 ° C., and an anhydrate was formed by losing all the crystal water by heating to 163 ° C. Fig. Insoluble in water (0.241G/lOOmL water), soluble in acid, ammonium salt, sodium thiosulfate and glycerol.

Preparation Method

1. The natural gypsum ore in addition to the net impurities, soil by calcination and grinding.
2. sodium sulfate was added to a by-product (calcium chloride) of alkali production by ammonia-alkali method, and the reaction product was purified to obtain calcium sulfate dihydrate.
3. by-products in the production of organic acids. For example, calcium oxalate, a by-product in the production of oxalic acid, is decomposed with sulfuric acid, and then refined to obtain calcium sulfate dihydrate.

Introduction

No smell. It's hygroscopic. 1 1/2 sub-crystal water was lost at 128 ℃ and all water was lost at 163 ℃. Soluble in acid, sodium thiosulfate and ammonium salt solution, soluble in 400 parts of water, less dissolved in hot water, very slowly soluble in glycerin, almost insoluble in alcohol and most organic solvents. It's irritating.

Use

is a raw material for the manufacture of cement, calcium sulfate hemihydrate and sulfuric acid. It is used as a filler in the paint and paper industry. Agricultural use as a fertilizer, can reduce soil alkalinity, improve soil performance. Food grade can be used as nutritional supplements (calcium fortification), coagulant, yeast food, dough regulator, chelating agent, also used as tissue fortifier in canned tomato, potato, brewing water hardening agent, wine flavor enhancer, etc.

Safety

packed in woven plastic bags lined with polyethylene plastic bags (food-grade polyethylene plastic bags for food use). The net weight of each bag is 25kg. Food-grade products should have obvious production date and "Food Additives" on the outer packaging bag. Store in a dry, clean warehouse. Food-grade products should be protected from toxic pollution, and are not allowed to be stored and mixed with toxic substances. Should pay attention to moisture-proof, moisture-proof.