Calcium hydrogen phosphate dihydrate

  • Brushite
  • Bekapress D 2
  • Phosphoric acid, calcium salt (1:1), dihydrate
  • Dicalcium phosphate dihydrate
  • Monohydrogen monocalcium phosphate dihydrate
Formula
CaHPO4 . 2H2O
Structure
Description
White plates or needles

Registry Numbers and Inventories.
CAS
7789-77-7
EC (EINECS/ELINCS)
231-826-1
36/37/38
Merck
13,1699
Beilstein/Gmelin
9956 (G)
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
CaHO4P.2H2O
Formula mass
172.09
Melting point, °C
36
Density
2.44 g.cm3 (20 C)
Solubility in water
Soluble
Refractive index
1.5394

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
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
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Thermal decomposition may produce toxic fumes of phosphorus oxides and/or phosphine.

Fire.
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.
Hazards
Emits toxic fumes under fire conditions.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Irritant. Irritating to eyes, respiratory system and skin.
   Ingestion
May be harmful if swallowed.
   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.

First aid
 
   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.

Transport.