trimethyl phosphate HL

Trimethyl phosphate

Phosphoric acid,trimethyl ester;Methyl phosphate,(MeO)3PO;Trimethyl phosphate;Trimethoxyphosphine oxide;Trimethyl orthophosphate;TMPA;TMPO;TMP;NSC 58985;91316-44-8

512-56-1

C3H9O4P

InChIKey=WVLBCYQITXONBZ-UHFFFAOYSA-N

140.075

140.07

208-144-8

Z1E45TMW1Z

0686

58985

DTXSID1021403

Liquid|Colorless liquid

2919900090

Flame Retardants

54.57000

-0.52

Trimethyl phosphate appears as a pale straw colored liquid. Inhalation may irritate respiratory tract. Vapor or liquid may irritate skin or eyes. Ingestion may irritate the mucous membranes of the gastrointestinal tract.

1.2144 g/cm³ @ Temp: 20 °C

-46 °C

85 °C @ Press: 26 Torr

83.7±38.8 °C

1.379

500 G/L (25 ºC)

Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully

1.133 hPa (25 °C)

LD50 orally in Rabbit: 840 mg/kg LD50 dermal Rabbit 3388 mg/kg

The residue from a large scale atmospheric pressure distillation of trimethyl phosphate exploded violently. This was attributed to rapid decomposition of the ester, catalyzed by the acidic degradation products, with evolution of gaseous hydrocarbons. It is recommended that only small batches of alkyl phosphates should be vacuum distilled and in presence of magnesium oxide to neutralize any acid by-products, and to suppress the acid catalyzed reaction.

Pleasant smelling

7.37e-12 cm3/molecule*sec

7.20e-09 atm-m3/mole|Henry's Law constant = 7.2X10-9 atm-cu m/mole at 20 °C

22.1% phosphorus; pour point: -46 °C|Specific gravity: 1.97 at 19.5 °C/0deg C|Hydroxyl radical reaction rate constant = 7.37X10-12 cu cm/molec-sec at 25 °C|Hydroxyl radical reaction rate constant = <6X10-20 cu cm/molec-sec at 25 °C

Water soluble.

Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters

TRIMETHYL PHOSPHATE may explode when heated. Residue from a large scale atmospheric pressure distillation of this chemical has exploded violently. It is incompatible with nitrates. (NTP, 1992). Organophosphates are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.