Sodium hydrogen phosphate dodecahydrate

  • Disodium orthophosphate dodecahydrate
  • Disodium hydrogen orthophosphate dodecahydrate
  • Monosodium phosphate dodecahydrate
  • hosphoric acid disodium dodecahydrate
  • Phosphoric acid, disodium salt, dodecahydrate
Formula
Na2HPO4.12H2O
Structure
Description
Colorless crystals

Registry Numbers and Inventories.
CAS
10039-32-4
EC (EINECS/ELINCS)
231-448-7
RTECS
TC5725000
RTECS class
Other
Beilstein/Gmelin
86759 (G)
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
HNa2O4P . 12H2O
Formula mass
358.14
Melting point, °C
35
Vapor density (air=1)
N/R
Density
1.52 g/cm3 (17 C)
Solubility in water
115 g/L (12 C(
Refractive index
1.429
Thermal expansion
o.o211/K
Heat of fusion
04.2 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
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 prevent skin exposure.
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.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids
Decomposition
Oxides of phosphorus, sodium oxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire.

Health.
Poison_Class
5 (Substances and products with a low hazard& potential)
Exposure effects
   Ingestion
May cause irritation of the digestive tract. Expected to be a low ingestion hazard.
   Inhalation
May cause respiratory tract irritation. Low hazard for usual industrial handling.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   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. Get medical aid if cough or other symptoms appear.
   Skin
Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2835 22 00