Pigment Orange 5 Chemical Name PIGMENT ORANGE 5 C.I. No. 12075 CAS No. 3468-63-1 Synonyms Fast Orange RN,Fast Orange RN-B,Luconyl G Orange,Luconyl Orange,Unisperse Red 2G-E2,Unisperse Red 2G-S Molecular Formula C16H10N4O5 Molecular Weight 338.27