INS No. 131
EINCECS No. 222-573-8
CAS No. 3536-49-0
CI Food Blue 5
CI No. 42051
CI Acid Blue 3
Carmine Blue V
Patent blue V is a dark bluish dye that provides a blue to greenish blue shade in applications. The colorant consists essentially of the calcium or sodium salt of 2-[(4-diethylaminophenyl)(4-diethylimino-2,5-cyclohexadien-1-ylidene)methyl]-4-hydroxy-1,5-benzenedisulfonate and subsidiary coloring matters. Patent blue V is soluble in water and slightly soluble in ethanol.
Typical applications include beverages, confectionery, bakery, dairy fats and oils, meat, seafood, snacks, dry mixes and seasonings, fruit preparation, convenient food, and flavors.
EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS); Scientific Opinion on the reevaluation of Patent Blue V (E 131) as a food additive. EFSA Journal 2013;11(3):2818. [35 pp.]. Available online
JECFA (Joint Expert Committee on Food Additives), 1982. WHO Food Additives Series, No. 17. Toxicological evaluation of certain food additives. Available online