The latest edition (8th) of the ""Pharmacopoia of the PRC"" is in 3 volumes, edited from the official Chinese language version of 2005. This edition places great importance to environmental protection, thus urges harmful solvents such as benzene be replaced by other solvents when possible. All are hard bound, and sold individually or as a set of 3.Volume One contains monographs of Chinese material medica, oils, fats, patent medicines, simple preparations, and more.