C14H14N2O6S2
370.4 g/mol
Dye & PigmentWarning
Amsonic acid
CAS81-11-8EC201-325-2
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Chemical intermediate for dyes and fluorescent brighteners
Amsonic acid, also known as 4,4'-diamino-2,2'-stilbenedisulfonic acid, is a white, water-soluble solid. It is a derivative of trans-stilbene containing both amino and sulfonic acid functional groups, and is primarily used as a chemical intermediate in the production of dyes and fluorescent brighteners.
Chemical intermediate for dyesChemical intermediate for fluorescent brighteners
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
2-naphthylamine-1-sulfonic acid
CAS81-16-3
Diazo component for acid dyes and pigments
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 scaffold
Bis(4-dimethylaminodithiobenzil)nickel
CAS38465-55-3
research chemical
Safety Reference
Warning
H302Harmful if swallowed
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for Amsonic acid (CAS 81-11-8) is 2921.59.
HS code (international, 6-digit)
2921.59
EU CN code (8-digit)
2921 59 90
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-amino-2-[2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid
InChIKey
REJHVSOVQBJEBF-UHFFFAOYSA-N
SMILES
C1=CC(=C(C=C1N)S(=O)(=O)O)C=CC2=C(C=C(C=C2)N)S(=O)(=O)O
Synonyms (23)
- DADS
- DASD
- DASDA
- DASSA
- Amsonic acid
- Amsonsaeure
- Flavonic acid
- Tinopal BHS
Sourcing Amsonic acid?
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