The RHB Series is formulated from an AB-Alkylbenzene synthetic blend and designed to function under the stringent requirements of CFCs-Chlorofluorocarbon, HCFCs-Hydrochlorofluorocarbon refrigerants like R11, R12, R13, R22, R113, R114, R123, R124 R401a, R401b, R402a, R402b, R403b, R406a, R408a, R409a, R500, R502, R503, & R717 (NH3 aka ammonia) DX and liquid overfeed industrial refrigeration systems.