IUPAC Name: barium(2+);5-chloro-4-methyl-2-[2-(2-oxonaphthalen-1-ylidene)hydrazinyl]benzenesulfonate Synonyms: Lake Red C, Red Lake C, Brilliant Red, Carnation Red, Astro Orange, Hamilton Red, Atomic Red, Desert Red, Potomac Red, Red Scarlet, Cosmetic DVR, Scarlet Toner Y, Pigment Red CD, Segnale Red LC, Bronze Red RO, Lutetia Red CLN, Segnale Red LCG, Segnale Red LCL, Vulcafor Red 2R, Vulcan Red LC