Agent Name

Orthanilic acid

Alternative Name

2-Aminobenzenesulfonic acid

CAS Number

88-21-1

Formula

C6-H7-N-O3-S

Major Category

Nitrogen Compounds

Synonyms

2-Sulfanilic acid; 1-Aminobenzene-2-sulfonic acid; 2-Aminobenzenesulfonic acid; Aniline-2-sulfonic acid; Aniline-o-sulfonic acid; Aniline-o-sulphonic acid; Anilino-2-sulfonic acid; Anilino-o-sulfonic acid; Anilino-o-sulphonic acid; o-Aminobenzenesulfonic acid; o-Aminophenylsulfonic acid; o-Sulfanilic acid; 2-Aminobenzenesulphonic acid; Benzenesulfonic acid, 2-amino-; Benzenesulfonic acid, o-amino-; [ChemIDplus] o-Anilinesulfonic acid; [Merck Index] 2-Aminobenzene sulfonic acid; 2-Aminophenylsulfonic acid; Aniline-2-sulphonic acid; 2-Anilinesulfonic acid; o-Amino benzene sulfonic acid; 2-Sulfoaniline; [CAMEO] UN2585

Category

Aminobenzenesulfonic Acids

Description

Solid; [Merck Index] Light brown solid; [CAMEO]

Sources/Uses

Used in organic synthesis and to make dyes and pharmaceuticals; [NTP] Used to make dyes and fine chemicals; [ToxPlanet: ECHA REACH Registrations]

Comments

May cause skin and mucous membrane irritation; [NTP] Causes burns; May cause skin sensitization; [ToxPlanet: ECHA REACH Registrations] Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract; [Sigma-Aldrich MSDS] See "Aniline hemisulfate

Exposure Assessment
Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Aryl sulfonic acids, solid, with not more than 5% free Sulfuric acid."

Adverse Effects
Skin Sensitizer

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: