Diethyl hydrogen phosphite

  • Diethyl acid phosphite
  • Diethyl phosphite
  • Diethyl phosphonate
  • Hydrogen diethyl phosphite
Formula
C4H11O3P
Structure
Description
Clear, colorless liquid.
Uses
Textile finishing agent, antioxidant, additive for adhesives & for extreme pressure lubricant, chemical intermediate for organic phosphorus compounds.

Registry Numbers and Inventories.
CAS
762-04-9
EC (EINECS/ELINCS)
212-091-6
RTECS
TG7875000
RTECS class
Other
Beilstein/Gmelin
605759
Beilstein Reference
4-01-00-01329
Swiss Giftliste 1
G-4735
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H11O3P
Formula mass
138.12
Boiling point, °C
50
Vapor pressure, mmHg
< 2
Density
1.093 g/cm3 (0 C)
Solubility in water
Soluble
Viscosity
103 cSt
Surface tension
30.79 g/s2 (20 C)
Refractive index
1.4057 (18.4 C)
Heat of vaporization
38.10 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Wear appropriate safety goggles, protective clothing and gloves.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents - moist air or water - strong bases - strong acids - acid chlorides.
Decomposition
Phosphine, carbon monoxide, oxides of phosphorus, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
90
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Hazards
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.

Health.
Poison_Class
5
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Harmful by inhalation.
   Skin
Irritating. Harmful on contact with the skin.

First aid
 
   Ingestion
Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.