Sodium dihydrogen phosphate monohydrate

  • Sodium monobasic phosphate
  • Monosodium phosphate monohydrate
  • Phosphoric acid, monosodium salt, monohydrate
Formula
NaH2PO4.H2O
Structure
Description
White hygroscopic crystals

Registry Numbers and Inventories.
CAS
10049-21-5
EC (EINECS/ELINCS)
231-449-2
RTECS
WA1900000
Merck
12,8806
Beilstein/Gmelin
33758 (G)
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
H2NaO4P . H2O
Formula mass
137.99
Melting point, °C
100
Density
2.04 g/cm3 (20 C)
Solubility in water
Readily soluble

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. 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 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.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
14
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Substance is incompatible with strong acids and may corrode some metals in the presence of moisture.
Decomposition
Carbon monoxide, oxides of phosphorus, carbon dioxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. Combustion generates toxic fumes. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
5 (Substances and products with a low hazard& potential)
Exposure effects
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation. Low hazard for usual industrial handling.
   Inhalation
May cause respiratory tract irritation. Low hazard for usual industrial handling.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Get medical aid if irritation or symptoms occur.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   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