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Naphthol yellow S

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Naphthol yellow S
Names
Preferred IUPAC name Disodium 5,7-dinitro-8-oxidonaphthalene-2-sulfonate
Other names Acid Yellow 1; Food Yellow 1; Sodium flavianate; Flavianic acid, sodium salt; C.I. 10316, Acid Yellow S, Amacid Yellow S, C.I. 10316, C.I. Acid Yellow 1, C.I. Food Yellow 1
Identifiers
CAS Number
3D model (JSmol)
Beilstein Reference 3839220
ChEBI
ChemSpider
ECHA InfoCard 100.011.537 Edit this at Wikidata
EC Number
  • 212-690-2
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C10H6N2O8S.2Na/c13-10-7-3-5(21(18,19)20)1-2-6(7)8(11(14)15)4-9(10)12(16)17;;/h1-4,13H,(H,18,19,20);;/q;2*+1/p-2Key: CTIQLGJVGNGFEW-UHFFFAOYSA-L
SMILES
  • C1=CC2=C(C=C1S(=O)(=O))C(=C(C=C2(=O))(=O))..
Properties
Chemical formula C10H4N2Na2O8S
Molar mass 358.19 g·mol
Appearance yellow solid
Hazards
GHS labelling:
Pictograms GHS07: Exclamation markGHS08: Health hazard
Signal word Warning
Hazard statements H317, H373
Precautionary statements P260, P261, P272, P280, P302+P352, P314, P333+P313, P363, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

Naphthol yellow S is an organic compound that is a dye. It is a derivative of 1-naphthol. At one time it was a popular food colorant but it was delisted in 1959 in the U.S.

References

  1. Naphthol Yellow S at Sigma-Aldrich
  2. "Naphthol Yellow S". pubchem.ncbi.nlm.nih.gov.
  3. Sharma, Vinita; McKone, Harold T.; Markow, Peter G. (2011). "A Global Perspective on the History, Use, and Identification of Synthetic Food Dyes". Journal of Chemical Education. 88 (1): 24–28. Bibcode:2011JChEd..88...24S. doi:10.1021/ed100545v.
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