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.
Rats treated orally at 100 mg/kg and mice treated ip at 1000 mg/kg with (32)P-labeled trimethyl phosphate excreted primarily dimethyl phosphate in the urine. Only traces of the parent compound were detected, and only in the rats at less than 6 hr after treatment. S-Methyl cysteine and S-methyl cysteine N-acetate were also isolated. Small amounts of S-methyl glutathione were detected, presumably the initial methylation product in this series of metabolites ... . Metabolism of trimethyl phosphate was faster in the mouse than in the rat, but there was no evidence of further conversion to monomethyl phosphate in either species ... .
IDENTIFICATION AND USE: Trimethyl phosphate is a colorless liquid. It is used as a gasoline additive for controlling surface ignition and spark plug fouling; methylating agent, chemical intermediate in the production of polymethyl polyphosphates; flame retardant solvent for paints and polymers; catalyst in the preparation of polymers and resins. HUMAN EXPOSURE AND TOXICITY: Weakness and paralysis are neurotoxic effects of trimethyl phosphate. ANIMAL STUDIES: Trimethyl phosphate was a rabbit eye irritant. In rabbits oral or dermal administration produced flaccid and spastic paralysis. Trimethyl phosphate was neurotoxic in beagle dogs. After 4 wk, neurotoxicity was noted in impairment of hopping, tactile placing, and atactic gait. Electrophysiologic tests indicated a prolonged latency of neuromuscular impulse transmission after wk 9, followed by a decrease in maximum conduction velocity of sensory fibers. Peripheral nerve fibers also had abnormalities at this time, including paranodal and internodal swelling, paranodal demyelination, and distal fragmentation. Trimethyl phosphate induced sterility in mice, rats and rabbits. Trimethyl phosphate primarily affected epididymal spermatozoa, probably by action of sperm motility. Trimethyl phosphate causes aspermia in D. melanogaster males. Evidence from cytological studies of larval testes suggests that the chemosterilizing effect of the chemical is upon early primary spermatocytes. In developmental studies in mice, F1 male progeny were sterile or semi-sterile, resulting from heritable translocations. Thus, trimethyl phosphate is capable of causing chromosomal damage in mouse spermatids. in NTP carcinogenicity studies trimethyl phosphate was associated with the induction of benign fibromas of the subcutaneous tissue in male Fischer rats. No evidence of carcinogenicity of the compound was obtained in female rats. Trimethylphosphate was carcinogenic in female mice, inducing adenocarcinomas of the uterus/endometrium. No evidence of carcinogenicity of the compound was obtained in male mice. ECOTOXICITY STUDIES: In Japanese quail treated orally with trimethyl phosphate, there was rapid decline in the percentage of fertile eggs during the 10 day period following the first dose. In another study it was reported that only 81% of eggs laid between 1 and 35 days after treatment of male quail with trimethyl phosphate were fertile, significantly less than in the control group .
来源:Hazardous Substances Data Bank (HSDB)
毒理性
暴露途径
该物质可以通过吸入其蒸汽、通过皮肤接触以及摄入进入人体。
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
吸入症状
咳嗽。喉咙痛。
Cough. Sore throat.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
皮肤症状
Redness.
Redness.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
眼睛症状
Redness.
Redness.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)