Defination: The color additive Ext. D&C Violet No. 2 is principally the \nmonosodium salt of 2-[(9,10-dihydro-4-hydroxy \n-9,10-dioxo-1-anthracenyl) amino]-5-methyl-benzenesulfonic acid. Color Index Name: Acid Violet 43 Color Index: 60730 CAS No.: 4430-18-6 Chemical Formula: C21H14NO6SNa View Specification