Agent Name

N-Phenylsulfanilic acid

CAS Number

101-57-5

Formula

C12-H11-N-O3-S

Major Category

Dyes

Synonyms

Sulfodiphenylamine; 4-Anilinobenzenesulfonic acid; 4-Sulfodiphenylamine; Benzenesulfonic acid, p-anilino-; Diphenylamine-4-sulfonic acid; Diphenylaminosulfonic acid; N-Phenyl-p-aminobenzenesulfonic acid; p-Anilinobenzenesulfonic acid; Benzenesulfonic acid, 4-(phenylamino)-; Sulfanilic acid, N-phenyl- (8CI); p-Anilinobenzenesulphonic acid; [ChemIDplus] 4-(Phenylamino)benzenesulfonic acid; 4-Diphenylaminesulfonic acid; [Merck Index]

Category

Indicator Dyes

Description

Solid; Turns blue on light exposure; [Merck Index]

Sources/Uses

Used in the colorimetric determination of nitrates, as an oxidation-reduction indicator, and for the detection of oxidizing materials; [Merck Index]

Comments

Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; [Sigma-Aldrich MSDS] See "Diphenylamine." See "N-Phenylsulfanilic acid, sodium salt."

Adverse Effects
Toxic Pneumonitis

Yes

Methemoglobinemia

Methemoglobinemia, Secondary

Dermatotoxin

Skin Burns

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