Naphthol yellow S

Naphthol yellow S[1]
Names
	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	846-70-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:87219 ;
ECHA InfoCard	100.011.537
PubChem CID	2724063;
UNII	08F8S9O3I5 ;
CompTox Dashboard (EPA)	DTXSID1041718 ;
	SMILES C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(C=C2[N+](=O)[O-])[N+](=O)[O-])[O-].[Na+] .[Na+];
Properties
Chemical formula	C10H4N2Na2O8S
Molar mass	358.19 g·mol−1
Appearance	yellow solid
Hazards
S-phrases (outdated)	S22 S24/25
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is ?)
	Infobox references

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.[2]

References

Naphthol Yellow S at Sigma-Aldrich
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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[1] Naphthol Yellow S at Sigma-Aldrich

[2] 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.