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Trimethyl phosphite

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Trimethyl phosphite molecular structure
Molecular structure

The Sigma-Aldrich catalog lists 6 grades and pack sizes of Trimethyl phosphite (CAS 121-45-9). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS121-45-9
Molecular formulaC3H9O3P
Molecular weight124.08 g/mol
IUPAC nametrimethyl phosphite
SynonymsTrimethoxyphosphine · Phosphorous acid, trimethyl ester · Methyl phosphite · Trimethylfosfit · Trimethoxyfosfin · Fosforyn trojmetylowy
Safety & Hazards (GHS) Danger
Flammable Flammable Corrosive Corrosive Irritant Irritant
  • H226 Flammable liquid and vapor
  • H302 Harmful if swallowed
  • H315 Causes skin irritation
  • H318 Causes serious eye damage
  • H335 May cause respiratory irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand Product / grade Code
Sigma TRIMETHYL PHOSPHITE SOLUTION, NMR REFER 733776-8IN Request Quote
Sigma TRIMETHYL PHOSPHITE, 99+% 240907-100G
240907-25G		 Request Quote
Sigma TRIMETHYL PHOSPHITE, >=97% 92730-1L
92730-250ML
92730-50ML		 Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.