Product Identification

Product Name

Calcium sulfate dihydrate

Synonyms

Compactrol
Landplaster
Phosphogypsum

CAS

10101-41-4

Formula

CaH4O6S

Molecular Weight

172.17

EINECS

231-900-3

RTECS

EW4150000

RTECS Class

Agricultural Chemical and Pesticide

Merck

13,1711

Beilstein/Gmelin

7487 (G)

Physical and Chemical Properties

Appearance

White or nearly white, odorless crystals. Some forms of calcium sulfate have a fibrous appearance.

Solubility in water

Slightly soluble

Density

2.32 g/cm3 (20 C)

Usage

Used to make portland cement, plaster of paris and artificial marble; used in agriculture as a soil conditioner; used as a white pigment, filler or glaze in paints, enamels, pharmaceuticals, paper, insecticide dusts, yeast manufacture and polishing powders; in manufacture of sulfuric acid, calcium carbide and ammonium sulfate.

Refractive Index

1.5248

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use.

Handling

Wash thoroughly after handling. Wash hands before eating. Use only in a well ventilated area. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

Causes respiratory tract irritation.

Skin

May cause skin irritation.

Eyes

May cause eye irritation.

Ingestion

Ingestion of large amounts may cause gastrointestinal irritation.

EC Safety Phrase

S 22 24/25

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Exposure Effects

May cause cancer according to animal studies. Repeated inhalation may cause nasal and tracheal inflammation. Chronic inhalation may lead to decreased pulmonary function.

Poison Class

F (Not subject to toxicity classification)

Fire Fighting Measures

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, using the appropriate protective equipment.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents and moisture.

Decomposition

Oxides of sulfur, irritating and toxic fumes and gases, calcium oxide.

Transport Information

HS Code

2833 29 90