Quinoline Yellow WS

Quinoline Yellow WS
Names
	IUPAC name Sodium 2-(1,3-dioxoindan-2-yl)quinolinedisulfonate
	Other names C.I. Acid Yellow 3, Food Yellow 13, D&C Yellow No. 10, Acid yellow 3, Quinidine Yellow KT, Japan Yellow 203, Lemon Yellow ZN 3, C.I. 47005
Identifiers
CAS Number	8004-92-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	23070 ;
ECHA InfoCard	100.116.526
EC Number	305-897-5;
E number	E104 (colours)
PubChem CID	24671;
UNII	35SW5USQ3G ;
CompTox Dashboard (EPA)	DTXSID0041721 ;
	InChI InChI=1S/C18H11NO8S2.2Na/c20-17-11-3-1-2-4-12(11)18(21)15(17)13-6-5-9-7-10(28(22,23)24)8-14(16(9)19-13)29(25,26)27;;/h1-8,15H,(H,22,23,24)(H,25,26,27);;/q;2+1/p-2 Key: FZUOVNMHEAPVBW-UHFFFAOYSA-L ; InChI=1/C18H11NO8S2.2Na/c20-17-11-3-1-2-4-12(11)18(21)15(17)13-6-5-9-7-10(28(22,23)24)8-14(16(9)19-13)29(25,26)27;;/h1-8,15H,(H,22,23,24)(H,25,26,27);;/q;2+1/p-2 Key: FZUOVNMHEAPVBW-NUQVWONBAX;
	SMILES [Na+].[Na+].[O-]S(=O)(=O)c1cc(cc2ccc(nc12)C4C(=O)c3ccccc3C4=O)S([O-])(=O)=O;
Properties
Chemical formula	C18H13NO5/8/11S1/2/3Na1/2/3
Molar mass	477.38 g/mol
Appearance	Greenish yellow powder
Melting point	150 °C (302 °F; 423 K) (decomposes)
Solubility in water	Soluble
Acidity (pKa)	1.8
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302
Precautionary statements	P264, P270, P301+P312, P501
	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

Quinoline Yellow WS is a mixture of organic compounds derived from the dye Quinoline Yellow SS (spirit soluble). Owing to the presence of sulfonate groups, the WS dyes are water-soluble (WS). It is a mixture of disulfonates (principally), monosulfonates and trisulfonates of 2-(2-quinolyl)indan-1,3-dione with a maximum absorption wavelength of 416 nm.^p. 119

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