Sodium dihydrogen phosphate

  • Acid sodium phosphate
  • Monobasic sodium phosphate
  • Monosodium dihydrogen orthophosphate
  • Monosodium dihydrogen phosphate
  • Monosodium hydrogen phosphate
  • Monosodium orthophosphate
Formula
NaH2PO4
Structure
Description
White, odorless, granular solid or crystalline powder, slightly hygroscopic.
Uses
pH Adjustment, Fungicide, Herbicide, Microbiocide

Registry Numbers and Inventories.
CAS
7558-80-7
EC (EINECS/ELINCS)
231-449-2
RTECS
WA1900000
RTECS class
Primary Irritant
Merck
12,8806
Beilstein/Gmelin
12533 (G)
EPA OPP
76409
Swiss Giftliste 1
G-2611
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H2NaO4P
Formula mass
119.98
Density
0.9996 g/cm3 (24.75 - 24.95 C)
Solubility in water
487 g/L @ 25 C
Thermal expansion
0.03039/K

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Insufficient information.
Handling
Use with adequate ventilation. Minimize dust generation and accumulation. Avoid prolonged or repeated contact with skin. Avoid contact with 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 shipping and handling conditions.
Incompatibilities
None reported with common materials.
Decomposition
Carbon monoxide, oxides of phosphorus, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Fire fighting
Extinguish using media most apropriate for surrounding fire. Wear a self-contained breathing apparatus with a full facepiece operated in the positive pressure demand mode with appropriate turn-out gear and chemical resistant personal protective equipment.
Fire potential
Nonflammable sodium dihydrogen phosphate monohydrate
Hazards
Behavior in fire: May melt with loss of steam.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
5
Exposure effects
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   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