C16H13NO4S
315.3 g/mol
Dye & PigmentWarning
4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid
CAS119-40-4EC204-320-3
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye intermediate for azo dyes
4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid is an organic compound used as a dye intermediate in the production of azo dyes. It is characterized by a naphthalene ring system with sulfonic acid, hydroxyl, and phenylamino substituents.
dye intermediate for azo dyes
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongStructure SimilarSimilarity 0.85
Rhoduline acid
CAS87-03-6
dye intermediate
SimilarStructure SimilarSimilarity 0.82
7-Anilino-1-naphthol-3-sulfonic acid
CAS119-19-7
dye intermediate
ApplicationSame Use
Benzidine
CAS92-87-5
dye intermediate for azo dyes
ReferenceSame Category
5-Amino-2-[(4-aminophenyl)amino]benzenesulfonic acid
CAS119-70-0
dye intermediate
ReferenceSame Category
4-Nitro-4'-aminostilbene-2,2'-disulfonic acid
CAS119-72-2
stilbene dye intermediate
ReferenceSame Category
Benzenesulfonic acid, 5-amino-2-[2-[4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-2-sulfophenyl]ethenyl]-
CAS119-74-4
dye intermediate
ReferenceSame Category
1-naphthylamine-6-sulfonic acid
CAS119-79-9
dye intermediate
Referencesame scaffold
4-Hydroxy-6-(3-sulphoanilino)naphthalene-2-sulphonic acid
CAS25251-42-7
Dye intermediate
Safety Reference
Warning
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid (CAS 119-40-4) is 2922.29.
HS code (international, 6-digit)
2922.29
EU CN code (8-digit)
2922 29 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
7-anilino-4-hydroxynaphthalene-2-sulfonic acid
InChIKey
YGNDWDUEMICDLW-UHFFFAOYSA-N
SMILES
C1=CC=C(C=C1)NC2=CC3=CC(=CC(=C3C=C2)O)S(=O)(=O)O
Synonyms (23)
- A1CFI
- N-PHENYL I ACID
- N-PHENYL J ACID
- Phenyl I Acid
- Phenyl J Acid
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