C10H9NO3S
223.25 g/mol
Dye & PigmentWarning
2-AMINO-1-NAPHTHALENESULFONIC ACID
CAS81-16-3EC201-331-5
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Diazo component for acid dyes and pigments
2-Amino-1-naphthalenesulfonic acid, commonly known as Tobias acid, is an organic compound featuring both an amino group and a sulfonic acid group on a naphthalene ring. It is one of several aminonaphthalenesulfonic acids and is primarily significant as a diazo component in the production of acid dyes and pigments.
Diazo component for acid dyesDiazo component for pigments
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.
Sourcing 2-AMINO-1-NAPHTHALENESULFONIC ACID?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
ReferenceSame Category
3,4,9,10-perylenetetracarboxylic diimide
CAS81-33-4
pigment for plastics
ReferenceSame Category
Disperse Violet 28
CAS81-42-5
Disperse dye for textiles
ReferenceSame Category
D&C violet no. 2
CAS81-48-1
Dye for cosmetics and plastics
ReferenceSame Category
Quinizarin
CAS81-64-1
Solvent dye and chemical intermediate
Safety Reference
Warning
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 2-AMINO-1-NAPHTHALENESULFONIC ACID (CAS 81-16-3) 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
2-aminonaphthalene-1-sulfonic acid
InChIKey
GWIAAIUASRVOIA-UHFFFAOYSA-N
SMILES
C1=CC=C2C(=C1)C=CC(=C2S(=O)(=O)O)N
Synonyms (15)
- Kyselina tobiasova
- Kyselina tobiasova [Czech]
- Naphthylaminsulfosaure
- Tobias acid
- aminonaphthalenesulfonic acid
Sourcing 2-AMINO-1-NAPHTHALENESULFONIC ACID?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.