C10H9NO3S
223.25 g/mol
Dye & PigmentWarning
5-Amino-2-naphthalenesulfonic acid
CAS119-79-9EC204-351-2
Category
Dye & Pigment
Compound Class
Amine
Primary Use
dye intermediate
5-Amino-2-naphthalenesulfonic acid is an aminonaphthalenesulfonic acid derivative containing both amine and sulfonic acid functional groups. It is primarily used as a dye intermediate in industrial manufacturing.
dye intermediate
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
StrongSame Parent
1-Aminonaphthalene-6-sulfonic acid
CAS51548-48-2
Intermediate for azo dyes
SimilarStructure SimilarSimilarity 0.75
1,7-cleve'S acid
CAS119-28-8
Azo dye intermediate
ReferenceSame Category
Dianisidine
CAS119-90-4
Intermediate for dyes and pigments
ReferenceSame Category
3-amino-4-methoxybenzanilide
CAS120-35-4
Pigment intermediate
ReferenceSame Category
P-cresidine
CAS120-71-8
Chemical intermediate for dyes
ReferenceSame Category
Chromium hydroxide green
CAS12001-99-9
green pigment for foods and cosmetics
Safety Reference
Warning
H412Harmful to aquatic life with long lasting effects
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 5-Amino-2-naphthalenesulfonic acid (CAS 119-79-9) is 2921.45.
HS code (international, 6-digit)
2921.45
EU CN code (8-digit)
2921 45 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
5-aminonaphthalene-2-sulfonic acid
InChIKey
UWPJYQYRSWYIGZ-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=CC(=C2)S(=O)(=O)O)C(=C1)N
Synonyms (26)
- 1,6-Cleve's acid
- 1-Amino-6-sulfonaphthalene
- 1-amino-6-sulphonaphtalene
- 6-sulfo-1-naphthylamine
- Cleve's acid-1,6
- Cleve's beta-acid
- Clevesaure
- Kyselina cleve
- Kyselina cleve [Czech]
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