Flash Point:81 F (27 C) (CC)
Lower Limits:3.9%
Upper Limits:>14%
Extinguishing Media:regular dry chemical, carbon dioxide, water,
regular foam Large fires: Use regular foam or flood with fine water
spray.
Fire Fighting Procedures:Move container from fire area if it can be
done without risk. Cool containers with water spray until well
after the fire is out. Stay away from the ends of tanks. For fires
in cargo or storage area: Cool containers with water from unmanned
hose holder or monitor nozzles until well after fire is out. If
this is impossible then take the following precautions: Keep
unnecessary people away, isolate hazard area and deny entry. Let
the fire burn. Withdraw immediately in case of rising sound from
venting safety device or any discoloration of tanks due to fire.
For tank, rail car or tank truck: Evacuation radius: 800 meters
(1/2 mile). Do not attempt to extinguish fire unless flow of
material can be stopped first. Flood with fine water spray. Do not
scatter spilled material with high-pressure water streams. Cool
containers with water spray until well after the fire is out. Apply
water from a protected location or from a safe distance. Avoid
inhalation of material ocombustion by-products. Stay upwind and
keep out of low areas.
Unusual Fire/Explosion Hazard:Severe fire hazard. Vapor/air mixtures
are explosive above flash point. The vapor is heavier than air.
Vapors or gases may ignite at distant ignition sources and flash
back.

Spill Release Procedures:Avoid heat, flames, sparks and other sources
of ignition. Stop leak if possible without personal risk. Reduce
vapors with water spray. Small spills: Absorb with sand or other
non-combustible material. Collect spilled material in appropriate
container for disposal. Large spills: Dike for later disposal.
Remove sources of ignition. Keep unnecessary people away, isolate
hazard area and deny entry.
Neutralizing Agent:

Handling and Storage Precautions:Store and handle in accordance with
all current regulations and standards. Subject to storage
regulations: U.S. OSHA 29 CFR 1910.106. Grounding and bonding
required. Keep separated from incompatible substances. Store in a
cool, dry place. Store in a tightly closed container. Store under
an inert atmosphere. Store in a well-ventilated area.
Other Precautions:

Respiratory Protection: TRIMETHYL PHOSPHITE: 2 ppm (10 mg/m3) OSHA TWA
(vacated by 58 FR 35338, June 30, 1993) 2 ppm ACGIH TWA 2 ppm (10
mg/m3) NIOSH recommended TWA 10 hour(s)
Ventilation:Provide local exhaust ventilation system. Ventilation
equipment should be explosion-resistant if explosive concentrations
of material are present. Ensure compliance with applicable exposure
limits.
Protective Gloves:Wear appropriate chemical resistant gloves.
Eye Protection:Wear splash resistant safety goggles with a faceshield.
Provide an emergency eye wash fountain and quick drench shower in
the immediate work area.
Other Protective Equipment:Wear appropriate chemical resistant
clothing.
Supplemental Safety and Health
TRIMETHYL PHOSPHITE: 2 ppm (10 mg/m3) OSHA TWA (vacated by 58 FR
35338, June 30, 1993) 2 ppm ACGIH TWA 2 ppm (10 mg/m3) NIOSH
recommended TWA 10 hour(s)

Boiling Pt:232-234 F (111-112 C)
Melt/Freeze Pt:-108 F (-78 C)
Vapor Pres:17.0 torr @ 20 C
Vapor Density:4.3
Spec Gravity:1.0520
pH:Not available
Evaporation Rate & Reference:Not available
Solubility in Water:reacts
Appearance and Odor:PHYSICAL STATE:liquid APPEARANCE:clear
COLOR:colorless ODOR:irritating odor
Corrosion Rate:

Stability Indicator/Materials to Avoid:May react with evolution of heat
on contact with water. May decompose on contact with heat and/or
storage and use above room temperature.
Stability Condition to Avoid:Avoid heat, flames, sparks and other
sources of ignition. Containers may rupture or explode if exposed
to heat. Keep out of water supplies and sewers.
Hazardous Decomposition Products:Thermal decomposition products: oxides
of phosphorus, phosphine, oxides of carbon Thermal decomposition
products: oxides of phosphorus, phosphine, oxides of carbon
Conditions to Avoid Polymerization:Will not polymerize.

Waste Disposal Methods:Dispose in accordance with all applicable
regulations. Subject to disposal regulations: U.S. EPA 40 CFR 262.
Hazardous Waste Number(s): D001. D003.

Toxicological Information:TRIMETHYL PHOSPHITE: IRRITATION DATA: 500 mg
skin-rabbit severe; 500 mg skin-mammal mild; 100 mg eyes-mammal
mild TOXICITY DATA: 2600 mg/kg skin-rabbit LD50; 1600 mg/kg
oral-rat LD50 LOCAL EFFECTS: Corrosive: inhalation, skin, eye ACUTE
TOXICITY LEVEL: Moderately Toxic: ingestion Slightly Toxic: dermal
absorption REPRODUCTIVE EFFECTS DATA: Available.

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.

Ecological:Not available

Transport Information:U.S. DOT 49 CFR 172.101: PROPER SHIPPING NAME:
Trimethyl phosphite ID NUMBER: UN2329 HAZARD CLASS OR DIVISION: 3
PACKING GROUP: III LABELING REQUIREMENTS: Flammable liquid

SARA Title III Information: SARA TITLE III SECTION 302 EXTREMELY
HAZARDOUS SUBSTANCES (40 CFR 355.30): Not regulated. SARA TITLE
III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR 355.40): Not
regulated. SARA TITLE III SARA SECTIONS 311/312 HAZARDOUS
CATEGORIES (40 CFR 370.21): ACUTE: Yes CHRONIC: No FIRE: Yes
REACTIVE: Yes SUDDEN RELEASE: No SARA TITLE III SECTION 313 (40
CFR 372.65): Not regulated.
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
SUBSTANCES (40 CFR 302.4): Not regulated. OSHA PROCESS SAFETY
(29CFR1910.119): Not regulated.
State Regulatory Information: California Proposition 65: Not regulated.