dimethyl methylphosphonate dimethyl methylphosphonate dimethyl methylphosphonate is an organophosphorus compound with the chemical formula ch3po(och3)2. it is a colourless liquid, which is primarily used as a flame retardant. dimethyl methylphosphonate names preferred iupac name dimethyl methylphosphonate other names methylphosphonic acid dimethyl esterdimethoxymethyl phosphine oxidedimethyl methanephosphonatedimethyl methyl phosphonatefran tf 2000fyron dmmpmetarannsc 62240o,o-dimethyl methylphosphonatemethanereoflam dmmp identifiers cas number 756-79-6 y 3d model (jsmol) interactive image chembl chembl2924224 chemspider 12418 y echa infocard 100.010.957 ec number 212-052-3 pubchem cid 12958 unii 20z996230u y un number 1993 comptox dashboard (epa) dtxsid0020494 inchi inchi=1s/c3h9o3p/c1-5-7(3,4)6-2/h1-3h3 ykey: vonwdaspfiqpdy-uhfffaoysa-n yinchi=1/c3h9o3p/c1-5-7(3,4)6-2/h1-3h3key: vonwdaspfiqpdy-uhfffaoyag smiles o=p(oc)(oc)c properties chemical formula c3h9o3p molar mass 124.076 g·mol−1 appearance colourless liquid density 1.145 g/ml at 25 °c melting point −50 °c (−58 °f; 223 k) boiling point 181 °c (358 °f; 454 k) solubility in water slowly hydrolyses hazards occupational safety and health (ohs/osh): main hazards toxic ghs labelling: pictograms signal word warning hazard statements h319, h340, h361f precautionary statements p201, p305+p351+p338, p308+p310 flash point 69 °c (156 °f; 342 k) closed cup lethal dose or concentration (ld, lc): ld50 (median dose) oral (rat) 8,210 mg/kginhalation (rat) 1h 20.13 mg/ldermal (rabbit) >2,000 mg/kg except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references synthesis dimethyl methylphosphonate can be prepared from trimethyl phosphite and a halomethane (e.g. iodomethane) via the michaelis–arbuzov reaction. dimethyl methylphosphonate is a schedule 2 chemical as it may be used in the production of chemical weapons. it will react with thionyl chloride to produce methylphosphonic acid dichloride, which is used in the production of sarin and soman nerve agents. various amines can be used to catalyse this process. it can be used as a sarin-simulant for the calibration of organophosphorus detectors. uses the primary commercial use of dimethyl methylphosphonate is as a flame retardant. other commercial uses are a preignition additive for gasoline, anti-foaming agent, plasticizer, stabilizer, textile conditioner, antistatic agent, and an additive for solvents and low-temperature hydraulic fluids. it can be used as a catalyst and a reagent in organic synthesis, as it can generate a highly reactive ylide. the yearly production in the united states varies between 100 and 1,000 short tons (91,000 and 907,000 kg). about 190 liters of dimethyl methylphosphonate, together with other chemicals, were released during the crash of el al flight 1862 at bijlmer in amsterdam in 1992.