[R-(E,E)]-[3-Methyl-5-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2,4-pentadienyl]triphenyl-phosphonium Bromide is an intermediate in synthesizing (6'R)-β,ε-Carotene (C184220). It is a trans isomer of carotenoid pigment found in plants. It is a terpenoid hydrocarbon.