Agent Name

Orange I

CAS Number

523-44-4

Formula

C16-H11-N2-O4-S.Na

Major Category

Dyes

Synonyms

1333 Orange; 4-((4-Hydroxy-1-naphthalenyl)azo)benzenesulfonic acid, monosodium salt; 4-((4-Hydroxy-1-naphthalenyl)azo)benzenesulphonic acid, monosodium salt; 4-(p-Sulfophenylazo)-1-naphthol, sodium salt; 4-p-Sulfophenylazo-1-naphthol monosodium salt; 4-p-Sulphophenylazo-1-naphthol, monosodium salt; A.F. Orange No. 1; AF Orange No. 1; Acid Leather Orange I; Acid Orange 20; Acid Orange I; Acid phosphine CL; Aizen Food Orange No. 1; Aizen Naphthol Orange I; Aizen Orange I; C.I. 14600; C.I. 150; C.I. Acid Orange 20; C.I. Acid Orange 20, monosodium salt; Certiqual Orange I; Dye Orange No. 1; Eniacid Orange I; Ext D and C Orange No. 3; External D and C Orange No. 3; Extract D and C Orange No. 3; Extract D and C Orange Number 3; F. D. C Orange 1; FD and C Orange No. 1; FDC Orange I; Hispacid Orange 1; Japan Orange 1; Japan Orange 402; Java Orange I; Nankai Acid Orange I; Naphthalene Orange I; Naphthol Orange; Neklacid Orange 1; Orange 1 sodium salt; Orange I; Orange I Extra Conc. A Export; Orange I, sodium salt; Orange IM; Orange S; Oranz I [Czech]; Oranz kysela 20 [Czech]; Schultz No. 185; Sodium azo-alpha-naphtholsulfanilate; Sodium azo-alpha-naphtholsulphanilate; Tertracid Orange I; Tropaeolin 1; Tropaeolin OOO 1; Tropaeolin OOO No. 1; Tropeolin [Czech]; Yellow 404; p-((4-Hydroxy-1-naphthyl)azo)benzenesulfonic acid, monosodium salt; p-((4-Hydroxy-1-naphthyl)azo)benzenesulfonic acid, sodium salt; p-((4-Hydroxy-1-naphthyl)azo)benzenesulphonic acid, monosodium salt; p-((4-Hydroxy-1-naphthyl)azo)benzenesulphonic acid, sodium salt; [ChemIDplus]

Category

Azo Dyes

Description

Reddish-brown solid; [Merck Index] Fine crystals; [MSDSonline]

Sources/Uses

Used for dyeing textiles and leather; Also used as an indicator dye; [HSDB]

Exposure Assessment
Vapor Pressure

1.98E-19 mm Hg

Adverse Effects
IARC Carcinogen

Not Classifiable

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Processes

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