C10H4N2Na2O8S
358.19 g/mol
Dye & PigmentWarning
Naphthol Yellow S
CAS846-70-8EC212-690-2
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Histological dye and acid yellow dye
Naphthol Yellow S is an organic sodium salt and the disodium salt of 5,7-dinitro-8-hydroxynaphthalene-2-sulfonic acid. It is primarily used as a histological dye and an acid yellow dye.
Histological dyeAcid yellow dye
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
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Diazonium salt for dye production
ReferenceSame Category
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CAS847180-48-7
fluorescent dye for labeling
ReferenceSame Category
Sodium 2-(1,3-dioxo-2,3-dihydro-1H-inden-2-yl)quinoline-6-sulfonate
CAS84864-68-6
yellow dye for coloring
ReferenceSame Category
Sudan III
CAS85-86-9
Biological stain and histological dye
Safety Reference
Warning
H317May cause an allergic skin reaction
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Naphthol Yellow S (CAS 846-70-8) is 3204.12.
HS code (international, 6-digit)
3204.12
EU CN code (8-digit)
3204 12 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
disodium;5,7-dinitro-8-oxidonaphthalene-2-sulfonate
InChIKey
CTIQLGJVGNGFEW-UHFFFAOYSA-L
SMILES
C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(C=C2[N+](=O)[O-])[N+](=O)[O-])[O-].[Na+].[Na+]
Synonyms (71)
- 1307 Yellow
- 1422 Yellow
- 99% +(HPLC)
- A.F. Yellow No. 1
- Acid Leather Yellow NYS
- Acid Yellow S
- Acid Yellow S (VAN)
- Acid yellow 1
- Amacid Yellow S
- C.I. Acid Yellow 1
- C.I. Food Yellow 1
- Calcocid Yellow S
- Dolkwal Naphthol Yellow S
- Dye FDC Yellow No.1
- EXT D&C yellow no. 7
- Edicol Supra Yellow Y
- Ext D&C Yellow 7
- FD and C Yellow No. 1
- FD&C YELLOW NO. 1 (DELISTED)
- FD&C Yellow No. 1
- Flavianic acid disodium salt
- Flavianic acid sodium salt
- Hispacid Yellow NSF
- Japan Yellow 403-1
- Japan Yellow No. 403-1
- Japanese Yellow 403-1
- Java Naphthol Yellow S
- Kca Naphthol Yellow S
- Kiton Yellow S
- Maple Naphthol Yellow S
- Nankai Naphthol Yellow S
- Naphthol Lake Yellow FY
- Naphthol Yellow L
- Naphthol Yellow OS
- Naphthol Yellow PL
- Naphthol Yellow S
- Naphthol Yellow SEL 12
- Naphthol Yellow SFQ
- Naphthol Yellow SNA
- Naphthol Yellow SXX
- Naphthol yellow S hydrate
- Naphthol yellow S sodium salt
- Naphtocard Yellow S
- Naphtol Yellow S
- Paper Yellow L
- Rakuto Naphthol Yellow S
- Sodium flavianate
- Solar Yellow NY
- Solar Yellow NY Conc
- Solar Yellow NY, sodium salt
- Transparent Yellow Lake 16091
- Yellow Lake 71
- Yellow No. 403
- Zlut kysela 1
- Zlut kysela 1 [Czech]
- Zlut naftolova S
- Zlut naftolova S [Czech]
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