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Substance Name: Trimethyl phosphite
RN: 121-45-9
UNII: 26Q0321ZDG
InChIKey: CYTQBVOFDCPGCX-UHFFFAOYSA-N

Molecular Formula

  • C3-H9-O3-P

Molecular Weight

  • 124.075
 

Classification Codes

Classification Codes

  • Reproductive Effect
  • Skin / Eye Irritant

Superlist Classification Code

  • TWA (2 ppm)
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Names and Synonyms

Name of Substance

  • Trimethyl phosphite

Synonyms

  • AI3-60394
  • EC 204-471-5
  • EINECS 204-471-5
  • Fosforyn trojmetylowy
  • Fosforyn trojmetylowy [Czech]
  • HSDB 1007
  • NSC 6513
  • Trimethoxyfosfin
  • Trimethoxyfosfin [Czech]
  • Trimethoxyphosphine
  • Trimethyl phosphite
  • Trimethylfosfit
  • Trimethylfosfit [Czech]
  • UNII-26Q0321ZDG

Systematic Names

  • Phosphorous acid, trimethyl ester
  • Trimethyl phosphite

Superlist Names

  • Phosphorous acid, trimethyl ester
  • Trimethyl phosphite
  • Trimethyl phosphite [UN2329] [Flammable liquid]
  • Trimethylphosphite
  • UN2329

Registry Numbers

CAS Registry Number

  • 121-45-9

FDA UNII

  • 26Q0321ZDG

System Generated Number

  • 0000121459

Structure Descriptors

InChI

1S/C3H9O3P/c1-4-7(5-2)6-3/h1-3H3

InChIKey

CYTQBVOFDCPGCX-UHFFFAOYSA-N

Smiles

P(OC)(OC)OC

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LC inhalation > 32700mg/m3/6 (32700mg/m3) SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE

SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
National Technical Information Service. Vol. OTS0537047,
mouse LCLo inhalation 32700mg/m3/6H (32700mg/m3) SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE
National Technical Information Service. Vol. OTS0537047,
mouse LD50 intraperitoneal 4180mg/kg (4180mg/kg)   Environmental Research. Vol. 9, Pg. 1, 1975.
mouse LD50 oral 4280mg/kg (4280mg/kg) BEHAVIORAL: ATAXIA

BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
National Technical Information Service. Vol. OTS0540442,
rabbit LD50 skin 2600mg/kg (2600mg/kg)   American Industrial Hygiene Association Journal. Vol. 34, Pg. 286, 1973.
rat LCLo inhalation 32700mg/m3/6H (32700mg/m3) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE

SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE
National Technical Information Service. Vol. OTS0537047,
rat LD50 oral 1600mg/kg (1600mg/kg)   Albright & Wilson Inc. Vol. #OPB-3, Pg. 1984,

Physical Properties

Physical Property Value Units Temp (deg C) Source
Boiling Point 111.5 deg C   EXP
log P (octanol-water) -0.730 (none)   EST
Water Solubility 7200 mg/L 25 EST
Vapor Pressure 18.7 mm Hg 25 EST
Henry's Law Constant 1.07E-05 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 8.36E-12 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.