Trimethyl phosphate

  • Methyl phosphate
Formula
C3H9O4P
Structure
Description
Clear colorless liquid with a pleasant odor.
Uses
For controlling spark plug fouling, surface ignition & rumble in gasoline engines.

Registry Numbers and Inventories.
CAS
512-56-1
EC (EINECS/ELINCS)
208-144-8
EC Class
mutagenic, harmful, irritant, carcinogenic
R 46 22 40
RTECS
TC8225000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector
Beilstein/Gmelin
1071731
Beilstein Reference
4-01-00-01259
Swiss Giftliste 1
G-3015
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H9O4P
Formula mass
140.08
Melting point, °C
-46
Boiling point, °C
197.2
Vapor pressure, mmHg
0/54 (25 C)
Vapor density (air=1)
4.8
Density
1.2365 g/cm3 (0 C)
Solubility in water
500 mg/L
Viscosity
2.26 cp (20 C)
Surface tension
37.76 g/s2 (17.5 C)
Refractive index
1.3967 (20 C)
Partition coefficient, pKow
-0.52
Heat of vaporization
41.6 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. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.
Disposal code
3
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents, strong bases.
Decomposition
Phosphine, carbon monoxide, oxides of phosphorus, carbon dioxide.

Fire.
Flash Point,°C
84
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Containers may explode when heated. Extinguishing media: Use agent most appropriate to extinguish fire. Cool containers with flooding quantities of water until well after fire is out. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Hazards
This chemical is nonflammable.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Carcinogin
CP65
Poison_Class
4
Exposure effects
Repeated exposure may cause nervous system abnormalities with muscle weakness and damage, motor incoordination, and sensation disturbances.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed. May cause pain, weakness and numbness with possible muscle paralysis.
   Inhalation
Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
Strong irritant of the skin.
   Eyes
Strong irritant of the eyes.

First aid
 
   Ingestion
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.
   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
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2919 00 90
 
Std. Transport #
4931489