Product Identification

Product Name

Calcium hydrogenphosphate dihydrate

Synonyms

Bekapress D 2
Brushite
Dicalcium phosphate dihydrate
Monohydrogen monocalcium phosphate dihydrate
Phosphoric acid, calcium salt (1:1), dihydrate

CAS

7789-77-7

Formula

CaH5O6P

Molecular Weight

172.09

EINECS

231-826-1

Merck

13,1699

Beilstein/Gmelin

9956 (G)

Physical and Chemical Properties

Appearance

White plates or needles

Solubility in water

Soluble

Melting Point

36

Density

2.44 g.cm3 (20 C)

Usage

Believed to be precursor of apatite and is found in guano-rich caves; formed by the interaction of guano with calcite and clay at a low ph.

Refractive Index

1.5394

First Aid Measures

Ingestion

If swallowed, wash out mouth with water provided person is conscious. Call a physician.

Inhalation

If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.

Skin

In case of contact, immediately wash skin with soap and copious amounts of water.

Eyes

In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Handling and Storage

Storage

Keep tightly closed.

Hazards Identification

Inhalation

Material is irritating to mucous membranes and upper respiratory tract. May be harmful if inhaled.

Skin

Causes skin irritation. May be harmful if absorbed through the skin.

Eyes

Causes eye irritation.

Ingestion

May be harmful if swallowed.

Hazards

Emits toxic fumes under fire conditions.

EC Risk Phrase

36/37/38

EC Safety Phrase

26 36

Exposure Controls/Personal Protection

Personal Protection

Compatible chemical-resistant gloves. Chemical safety goggles.

Respirators

Government approved respirator.

Exposure Effects

Irritant. Irritating to eyes, respiratory system and skin.

Fire Fighting Measures

Fire Fighting

Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.

Accidental Release Measures

Small spills/leaks

Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.

Stability and Reactivity

Stability

Stable at normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Thermal decomposition may produce toxic fumes of phosphorus oxides and/or phosphine.