SYNONYMS	QUINOLINE YELLOW-WS * C. I. FOOD YELLOW 13
DEFINITION	Quinoline Yellow-WS is prepared by sulfonating 2-(2-quinolyl) indan-1,3-dione. Quinoline Yellow consists essentially of sodium salt of a mixture of disulfonates (principally), monosulfonates and trisulfonates of the above compound and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured components.
	Quinoline Yellow-WS  is described as the sodium salt. The calcium and the potassium salt are also permitted.
CLASS	Quinophthalone
COLOUR INDEX NO.	47005
EEC NUMBER	E-104
EINECS	305-897-5
CHEMICAL NAMES	The disodium salt of the disulfonates of 2-(2-Quinolyl) indan-1,3-dione (principal component)
CHEMICAL FORMULA	C18H9N Na2O8S2 (principal component)
MOLECULAR WEIGHT	477.38 (principal component)
ASSAY	Content not less than 70% total colouring matters, calculated as the sodium salt;
	E 1% 1cm 865 (principal component) at ca 411 nm in aqueous acetic acid solution.
DESCRIPTION	Yellow powder
IDENTIFICATION
a. Spectrometry	Maximum in aqueous acitic acid solution of pH5 at ca 411 nm
b. Yellow solution in water
PURITY	Not more than 0.2%
Water Insoluble matter
Subsidiary colouring matters	Not more than 4.0%
Organic compounds other than colouring matters	[2-methylquinoline / 2-methylquinoline-sulfonic acid / Phthalic acid / 2,6-dimethyl quinoline / 2,6-dimethyl quinoline sulfonic acid ] - Total not more than 0.5%
2-(2-Quinoly) indan-1,3-dione	Not more than 4 mg/ kg
Unsulfonated primary aromatic amines	Not more than 0.01% (Calculated as aniline)
Ether extractable matter	Not more than 0.2% under neutral conditions
Arsenic	Not more than 3 mg/kg.
Lead	Not more than 10 mg/kg.
Mercury	Not more than 1 mg/kg.
Cadmium	Not more than 1 mg/kg.
Heavy metals (as Pb)	Not more than 40 mg/kg