Agent Name

Phosphorous acid

CAS Number

13598-36-2

Formula

H3-O3-P

Major Category

Toxic Gases & Vapors

Synonyms

Dihydroxyphosphine oxide; Orthophosphorus acid; Phosphorous acid; Phosphorus trihydroxide; Trihydroxyphosphine; Phosphonic acid; [ChemIDplus] Acide orthophosphoreux (DOT French); Acide phosphoreux (DOT French); Acido fosforoso (DOT Spanish); Acido ortofosforoso (DOT Spanish); o-Phosphorous acid; Phosphorous acid, ortho; [CAMEO] UN2834

Category

Acids, Inorganic

Description

White or yellowish solid; Very hygroscopic; [Hawley] White odorless crystalline solid; [MSDSonline]

Sources/Uses

Used in testing for mercury, as a chemical reducing agent, and to prepare phosphite salts; [Hawley] Used as a starting material to make lead phosphite, which is a PVC stabilizer; [Ullmann]

Comments

May cause severe skin, eye, and mucous membrane irritation; [CAMEO] Corrosive to skin and eyes; [eChemPortal: ERMA] Can cause severe burns; [eChemPortal: ESIS] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline]

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

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Toxicity Information

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Chemical Information

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Other Information

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