The color additive D&C Yellow No. 10 is a mixture of the sodium salts of the mono- and disulfonic acids of 2-(2-quinolinyl)-1 H -indene-1,3 (2 H )-dione consisting principally of the sodium salts of 2-(2,3-dihydro-1,3-dioxo-1 H -indene-2-yl)-6-quinolinesulfonic acid and 2-(2,3-dihydro-1,3-dioxo-1 H -indene-2-yl)-8-quinolinesulfonic acid with lesser amounts of the disodium salts of the disulfonic acids of 2-(2-quinolinyl)-1 H -indene-1,3(2 H )-dione (CAS Reg. No. 8004–92–0).

Colour Index No: 47005                             

CAS No: 8004-92-0

Chemical Formula: C18H9NO8S2Na

The color additive D&C Green No. 8 is principally the trisodium salt of 8-hydroxy-1,3,6-pyrene-trisulfonic acid.

Colour Index Name: Solvent Green 7          

Colour Index No: 59040     

CAS No: 6358-69-6

Chemical Formula: C16H17O10S3Na3

The color additive D&C Red No. 33 is principally the disodium salt of 5-amino-4-hydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic acid (CAS Reg. No. 3567–66–6).

Colour Index Name: Acid Red 33   

Colour Index No: 17200     

CAS No: 3567-67-6

Chemical Formula: C16H11 N3O7S2Na2

The color additive Ext. D&C Violet No. 2 is principally the monosodium salt of 2-[(9,10-dihydro-4-hydroxy -9,10-dioxo-1-anthracenyl) amino]-5-methyl-benzenesulfonic acid.

Colour Index Name: Acid Violet 43 

Colour Index No: 60730     

CAS No:  4430-18-6

Chemical Formula: C21H14NO6SNa