https://www.cdc.gov/niosh/chemicals/pel88/pell-pages/121-45.html
1988 OSHA PEL Project - Trimethyl Phosphite | NIOSH | CDC
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CDC - NIOSH Pocket Guide to Chemical Hazards - Trimethyl phosphite
Methyl phosphite, Trimethoxyphosphine, Trimethyl ester of phosphorous acid Colorless liquid with a distinctive, pungent odor.
niosh pocket guidechemical hazardscdcphosphite