C10H9NO3S
223.25 g/mol
Dye & PigmentDanger
5-aminonaphthalene-1-sulfonic acid
CAS84-89-9EC201-571-0
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye intermediate
5-Aminonaphthalene-1-sulfonic acid is a naphthalenesulfonic acid that serves as a dye intermediate. It is also used as a fluorophore for fluorescent nucleotide substrates in laboratory research.
dye intermediatefluorophore for fluorescent nucleotide substrates
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
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naphthalene sulfonic acid dye intermediate
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Histological dye and acid yellow dye
Safety Reference
Danger
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
Customs Tariff Classification
The international HS code for 5-aminonaphthalene-1-sulfonic acid (CAS 84-89-9) 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-1-sulfonic acid
InChIKey
DQNAQOYOSRJXFZ-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=CC=C2S(=O)(=O)O)C(=C1)N
Synonyms (24)
- 5NS
- 1,5-AmNS
- 1-Amino-5-sulfonaphthalene
- 5-Sulfo-1-naphthylamine
- Laurent acid
- Laurent's acid
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