Terphenyls are a group of closely related aromatic hydrocarbons. Also known as diphenylbenzenes or triphenyls, they consist of a central benzene ring substituted with two phenyl groups. The three isomers are ortho-terphenyl, meta-terphenyl, and para-terphenyl. Para-terphenyl is white crystal and soluble in benzene, acetone and chloroform, insoluble in water, which is an important intermediate to produce biphenyl liquid crystals. The purity of DYNOVA® para-terphenyl is as high as 99.9%.