Color Index: Pigment Yellow 139
C.I. Number: 56298 
CAS Number: 36888-99-0 
EU Number: 253-256-2
Chemical Family: Isoindolinone
Fast Yellow K1841 is a reddish yellow pigment, with excellent properties and high luster, high coloring strength.
Recommended for PVC, EVA, PS, PC, RUB, fibre, can be used for PBT, PA, PO.