C10H8O8S2
320.3 g/mol
Dye & PigmentWarning
4,5-dihydroxynaphthalene-2,7-disulfonic acid
CAS148-25-4EC205-712-7
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Azo dye intermediate
Chromotropic acid is a naphthalenesulfonic acid derivative with hydroxyl and sulfonic acid groups, commonly used as an analytical reagent and intermediate in azo dye manufacturing.
analytical reagentintermediate for azo dyes
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 4,5-dihydroxynaphthalene-2,7-disulfonic acid?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
SimilarStructure SimilarSimilarity 0.74
1-naphthol-8-amino-3,6-disulfonic acid
CAS90-20-0
dye and industrial waste
ApplicationSame Use
2-naphthol-6-sulfonic acid
CAS93-01-6
Azo dye intermediate
ApplicationSame Use
4-[(4-aminophenyl)diazenyl]benzenesulfonic acid
CAS104-23-4
Azo dye intermediate
ApplicationSame Use
(E)-N,N-Dimethyl-4-(thiazol-2-yldiazenyl)aniline
CAS267417-54-9
Azo dye intermediate
ApplicationSame Use
P-aminoacetanilide
CAS122-80-5
Azo dye intermediate
ReferenceSame Category
2-naphthol-3,6-disulfonic acid
CAS148-75-4
naphthalene sulfonic acid dye intermediate
ReferenceSame Category
3H-IndoliuM, 2-[5-[1-[6-[(3-azidopropyl)aMino]-6-oxohexyl]-1,3-dihydro-3,3-diMethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-1,3,3-triMethyl-5-sulfo-, inner salt
CAS1481447-40-8
fluorescent dye for labeling
ReferenceSame Category
Copper perchlorophthalocyanine
CAS14832-14-5
green pigment for inks and coatings
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4,5-dihydroxynaphthalene-2,7-disulfonic acid (CAS 148-25-4) is 2908.99.
HS code (international, 6-digit)
2908.99
EU CN code (8-digit)
2908 99 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
4,5-dihydroxynaphthalene-2,7-disulfonic acid
InChIKey
HLVXFWDLRHCZEI-UHFFFAOYSA-N
SMILES
C1=C2C=C(C=C(C2=C(C=C1S(=O)(=O)O)O)O)S(=O)(=O)O
Synonyms (8)
- 4,5-DHN-2,7-DSA
- Chromotropic acid
Sourcing 4,5-dihydroxynaphthalene-2,7-disulfonic acid?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.