m-Halogen-benzotrifluorides are nitrated to give compounds in which the nitro group is mainly in the ortho-position to the CF3 group. The products may be reduced to the corresponding amino compounds. According to the examples, m-chlorobenzotrifluoride, prepared by Sandmeyer's reaction upon m-aminobenzotrifluoride, is slowly added to a cooled mixture of nitric and sulphuric acids or to cold nitric acid itself; the product mainly comprises 6 - nitro - 3 - chloro - 1 - benzotrifluoride, which may then be reduced with iron and hydrochloric acid to the 6-amino body. A similar nitrated product is obtained when m-fluoro benzotrifluoride, prepared by heating the dry borofluoride of diazotized m-aminobenzotrifluoride, is used as starting material. British Specification 395,227 and French Specification 745,293 are referred to. The Provisional Specification also describes the nitration of m-acylamino-benzotrifluorides and includes an example of the preparation of a mixture of 2-nitro-, 4-nitro- and 6-nitro-3-acetamino-1-benzotrifluorides by adding 3-acetamino-1-benzotrifluoride to nitric acid at -10 DEG C., the products being separated by crystallization and steam distillation from alcohol; saponification of the acetamino compounds yields the corresponding amino bodies. In discussing the constitution of the nitro products, the preparation of 2- and 4-nitro-1-benzotrifluoride, 2- and 4-amino-1-benzotrifluoride, and 6-nitro- and 6-amino-3-chloro-1-benzotrifluoride is referred to.