C10H9NO7S2
319.3 g/mol
Dye & PigmentDanger
Chicago acid
CAS82-47-3EC201-425-6
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Naphthalene disulfonic acid dye intermediate
Chicago acid is a naphthalene disulfonic acid derivative used as a dye intermediate. It is characterized by the presence of amino, hydroxyl, and sulfonic acid groups on a naphthalene ring system.
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
ReferenceSame Category
1-naphthylamine-8-sulfonic acid
CAS82-75-7
dye intermediate
ReferenceSame Category
N,N'-Bis(2,6-diisopropylphenyl)-3,4,9,10-perylenetetracarboxylic Diimide
CAS82953-57-9
fluorescent solvent dye
ReferenceSame Category
3-methylsalicylic acid
CAS83-40-9
Dye manufacturing intermediate
ReferenceSame Category
1,5-naphthalenediol
CAS83-56-7
Dye manufacturing intermediate
Safety Reference
Danger
H314Causes severe skin burns and eye damage
Customs Tariff Classification
The international HS code for Chicago acid (CAS 82-47-3) is 2922.21.
HS code (international, 6-digit)
2922.21
EU CN code (8-digit)
2922 21 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-amino-5-hydroxynaphthalene-1,3-disulfonic acid
InChIKey
ZFRBZRZEKIOGQI-UHFFFAOYSA-N
SMILES
C1=CC2=C(C(=C1)O)C(=C(C=C2S(=O)(=O)O)S(=O)(=O)O)N
Synonyms (10)
- CaMKP Inhibitor
- Chicago acid
- Chicagosaure
- SS Acid
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