Defination: the color additive d&c yellow no. 10 is a mixture of the sodium nsalts of the mono- and disulfonic acids of 2-(2-quinolinyl)-1 h n-indene-1,3 (2 h )-dione consisting principally of the sodium salts of n2-(2,3-dihydro-1,3-dioxo-1 h -indene-2-yl)-6-quinolinesulfonic acid andn 2-(2,3-dihydro-1,3-dioxo-1 h -indene-2-yl)-8-quinolinesulfonic acid nwith lesser amounts of the disodium salts of the disulfonic acids of n2-(2-quinolinyl)-1 h -indene-1,3(2 h )-dione (cas reg. No. 8004–92–0). Color index: 47005 cas no.: 8004-92-0 chemical formula: