Hypophosphorous acid
Agent Name
Hypophosphorous acid
CAS Number
6303-21-5
Formula
H3-O2-P
Major Category
Toxic Gases & Vapors
Synonyms
Hypophosphorous acid (VAN); Hypophosphorus acid; Phosphine oxide, hydroxy-; Phosphonous acid (VAN); Phosphinic acid; [ChemIDplus] UN3264
Category
Acids, Inorganic
Description
Deliquescent solid (from the water-free acid); Supercools to colorless odorless liquid; mp = 26.5 deg C; [Merck Index] Colorless odorless solution; [MSDSonline]
Sources/Uses
Used to make hypophosphites and in electroplating baths; [Hawley]
Comments
A strong reducing agent; [Merck Index] Fire and explosion hazard in contact with oxidizing agents; [Hawley] A strong reducing agent; May cause irritation or burns to skin, eye, and respiratory tract; [CAMEO] Corrosive to skin and eyes; [eChemPortal: ERMA] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline]
Biomedical References
Exposure Assessment
Explanatory Notes
The Guide in the Emergency Response Guidebook is for "Corrosive liquid, acidic, inorganic, n.o.s."
Adverse Effects
Toxic Pneumonitis
Yes
Dermatotoxin
Skin burns
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: