C10H9NO3S
223.25 g/mol
Dye & PigmentWarning
5-Amino-2-naphthalenesulfonic acid
CAS51548-48-2EC204-351-2
Category
Dye & Pigment
Compound Class
Amine
Primary Use
Intermediate for azo dyes
5-Amino-2-naphthalenesulfonic acid is an organic compound containing both an amine and a sulfonic acid group on a naphthalene ring. It is primarily used as an intermediate in the production of azo dyes.
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
StrongSame Parent
1-naphthylamine-6-sulfonic acid
CAS119-79-9
dye intermediate
SimilarStructure SimilarSimilarity 0.75
1,7-cleve'S acid
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Azo dye intermediate
ApplicationSame Use
2,5-diaminobenzenesulfonic acid
CAS88-45-9
Intermediate for azo dyes
ApplicationSame Use
(E)-4,4'-dinitro-2,2'-stilbenesulfonic acid
CAS128-42-7
Intermediate for azo dyes
ApplicationSame Use
2-(4-Aminophenyl)-6-methyl-1,3-benzothiazole-7-sulfonic acid
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Intermediate for azo dyes
ReferenceSame Category
Iron(II) oxalate
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pigment for plastics and paints
ReferenceSame Category
C.I. Pigment Red 53:1, Ba-Salt
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pigment for inks and coatings
ReferenceSame Category
3-Nitrophthalonitrile
CAS51762-67-5
intermediate for phthalocyanine dyes and pigments
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 51548-48-2) 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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