C10H9NO3S
223.25 g/mol
Dye & PigmentDanger
Naphthionic acid
CAS84-86-6EC201-567-9
Category
Dye & Pigment
Compound Class
Organic Acid
Primary Use
Naphthalene sulfonic acid dye intermediate
Naphthionic acid is an aminonaphthalenesulfonic acid used as a dye intermediate, particularly in the synthesis of naphthalene sulfonic acid-based dyes.
Naphthalene sulfonic acid 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
SimilarStructure SimilarSimilarity 0.78
1-naphthylamine-5-sulfonic acid
CAS84-89-9
dye intermediate
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6-(4-Carboxyanilino)-4-hydroxy-2-naphthalenesulfonic acid
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Naphthalene sulfonic acid dye intermediate
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4-Hydroxy-6-methylamino-2-naphthalene sulfonic acid
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Naphthalene sulfonic acid dye intermediate
ApplicationSame Use
7-(Acetylamino)-4-hydroxy-2-naphthalenesulfonic acid
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Naphthalene sulfonic acid dye intermediate
ReferenceSame Category
4-hydroxy-1-naphthalenesulfonic acid
CAS84-87-7
dye intermediate
ReferenceSame Category
1-Naphthalenesulfonic acid, 5,6-diamino-
CAS84-92-4
naphthalene sulfonic acid dye intermediate
ReferenceSame Category
Solvent yellow 14
CAS842-07-9
Dye for hydrocarbon solvents and oils
ReferenceSame Category
5-amino-6-chloro-O-cresol
CAS84540-50-1
Hair dye ingredient
Safety Reference
Danger
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
Customs Tariff Classification
The international HS code for Naphthionic acid (CAS 84-86-6) 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
4-aminonaphthalene-1-sulfonic acid
InChIKey
NRZRRZAVMCAKEP-UHFFFAOYSA-N
SMILES
C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)O)N
Synonyms (33)
- 1,4-Naphthionic acid
- 1-Amino-4-sulfonaphthalene
- 1-Naphthylamin-4-sulfonsaeure
- Kyselina nafthionova
- Kyselina nafthionova [Czech]
- Naphthionic acid
- Naphthionsaeure
- Piria's acid
- Piria-Saeure
- Sulfonaphtin
- USAF M-5
- naphthionsaure
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