Agent Name

Tropaeolin OO

CAS Number

554-73-4

Formula

C18-H15-N3-O3-S.Na

Major Category

Dyes

Synonyms

Benzenesulfonic acid, 4-((4-(phenylamino)phenyl)azo)-, monosodium salt; Benzenesulfonic acid, 4-(2-(4-(phenylamino)phenyl)diazenyl)-, sodium salt (1:1); C.I. Acid Orange 5, monosodium salt (8CI); Sodium 4-((4-(anilino)phenyl)azo)benzenesulphonate; Acid Yellow D; Benzenesulfonic acid, p-((p-anilinophenyl)azo)-, monosodium salt; Benzenesulfonic acid, p-((p-anilinophenyl)azo)-, sodium salt; C.I. 13080; C.I. Acid Orange 5; Diphenylamine Orange; Hispacid Orange IV; Orange 4 Lake; Orange GS; Orange IV; Orange N; Sodium p-diphenylamino-azobenzenesulfonate; Solar Orange IV; Tertracid Orange IV; Tropeolin OO; [ChemIDplus] 4-[2-[4-(Phenylamino)phenyl]diazenyl]benzenesulfonic acid sodium salt (1:1); p-[(p-Anilinophenyl)azo]benzenesulfonic acid sodium salt; Sodium p-[(p-anilinophenyl)azo]benzenesulfonate; Fast Yellow; [Merck Index]

Category

Azo Dyes

Description

Orange-yellow or yellow solid; [Merck Index] Powder; [Sigma-Aldrich MSDS]

Sources/Uses

Used as a pH indicator; [Merck Index]

Comments

A skin and strong eye irritant; [Sigma-Aldrich MSDS]

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