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
Identifiers
CAS Number	846-70-8
ChEBI	CHEBI:87219
Jmol interactive 3D	Image
PubChem	2724063
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
Hazards
S-phrases	S22 S24/25
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Naphthol yellow S is a compound with formula Na₂(C₁₀H₄SN₂O₈). It is a dye.

References

1. Naphthol Yellow S at Sigma-Aldrich