Dimethyl hydrogen phosphite

Agent Name
Dimethyl hydrogen phosphite
CAS Number
Major Category
Other Classes
Dimethyl hydrogen phosphite formula graphical representation
Bis(hydroxymethyl)phosphine oxide; Dimethoxyphosphine oxide; Dimethyl acid phosphite; Dimethyl hydrogen phosphonate; Dimethyl phosphite; Dimethyl phosphonate; Dimethylester kyselini fosforite [Czech]; Dimethylester kyseliny fosforite [Czech]; Dimethylfosfit [Czech]; Dimethylfosfonat [Czech]; Dimethylhydrogenphosphite; Hydrogen dimethyl phosphite; Methyl phosphonate ((MeO)2HPO); Phosphonic acid, dimethyl ester; [ChemIDplus]
Phosphite Compounds
Colorless liquid; [HSDB]
Used to make insecticides and herbicides; [ChemIDplus] Used as a lubricant additive, an adhesive, a flame retardant for fabrics, a stabilizer in oil and plaster, and as a steel corrosion inhibitor in combination with pyrocatechol; [HSDB] Used to make water treatment chemicals, flame retardants, and pharmaceuticals; [eChemPortal: SIDSUNEP]
A skin, eye, mucous membrane, and respiratory tract irritant; [CAMEO] A skin and eye irritant; "The substance may have effects on the eyes, resulting in cataract." [ICSC] An irritant; Can be absorbed through skin; Effects in high-dose animal studies include injury to the liver, kidney, cornea, and bone structure; [MSDSonline]
Biomedical References

Exposure Assessment

Vapor Pressure
4.52 mm Hg
Lethal Concentration
LC50 (rat) > 20,000 mg/m3
Explanatory Notes
Flash point = 70 deg C; [HSDB] VP from ChemIDplus;

Adverse Effects

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion
IARC Carcinogen
Not classifiable

Diseases, Processes, and Activities Linked to This Agent


Industrial Processes with risk of exposure: