Dimethyl methylphosphonate

  • Dimethoxymethylphosphine oxide
  • Dimethyl methanephosphonate
  • DMMP
  • Pyrol DMMP
Formula
C3H9O3P
Structure
Description
Clear colorless liquid with a pleasant odor.
Uses
In heavy metal extraction & solvent separation, pre-ignition additive for gasoline, antifoam agent, plasticizer & stabilizer, textile conditioner & antistatic agent, additive in solvents & low temp hydraulic fluids.

Registry Numbers and Inventories.
CAS
756-79-6
EC (EINECS/ELINCS)
212-052-3
R 46 36 52/53
RTECS
SZ9120000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
3278
Merck
13,3425
Beilstein/Gmelin
878263
Beilstein Reference
4-04-00-03499
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H9O3P
Formula mass
124.08
Boiling point, °C
181
Vapor pressure, mmHg
1 (25 C)
Density
1.1596 g/cm3 (20 C)
Solubility in water
soluble
Surface tension
36.7 g/s2 (20 C)
Refractive index
1.4109 (20 C)
Heat of vaporization
52.33 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
If Tyvek-type disposable protective clothing is not worn during handling of this chemical, wear disposable Tyvek-type sleeves taped to your gloves.
Respirators
Wear a NIOSH-approved half face respirator equipped with a combination filter cartridge, i.e. organic vapor/acid gas/HEPA (specific for organic vapors, HCl, acid gas, SO2 and a high efficiency particulate filter).
Small spills/leaks
If you should spill this chemical, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
No data.
Incompatibilities
Incompatible with strong oxidizing agents and strong bases Reacts with organic halides at 302-392 F Reacts with enol lactones.

Fire.
Flash Point,°C
68
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used.
Fire potential
This chemical is combustible.

Health.
Exposure effects
   Ingestion
See inhalation.
   Inhalation
Symptoms of exposure to this compound may include irritation of the skin, eyes, mucous membranes and upper respiratory tract. Combustion products may cause breathing difficulty and pulmonary edema. It has weak cholinesterase inhibiting properties.
   Skin
See inhalation.
   Eyes
See inhalation

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
3278
Response guide