Introduction 2 Phenols 2.1 Sources of phenols -the coal-tar industry 2.2 Properties of phenolic fractions 2.3 Formulation of coal-tar disinfectants 2.4 The modern range of solubilized and emulsified phenolic disinfectants 2.4.1 Cresol and soap solution British Pharmacopoeia (BP) 1963 (Lysol) 2.4.2 Black fluids 2.4.3 White fluids 2.5 Non-coal-tar phenols 2.5.1 4-Tertiary octylphenol 2.5.2 2-Phenylphenol (2-phenylphenoxide) 2.5.3 4-Hexylresorcinol 2.6 Halo and nitrophenols 2.6.1 2,4,6-Trichlorophenol 2.6.2 Pentachlorophenol (2-phenylphenoxide) 2.6.3 4-Chloro-3-methylphenol (chlorocresol) 2.6.4 4-Chloro-3,5-dimethylphenol (chloroxylenol; para-chloro-metaxylenol; PCMX) 2.6.5 2,4-Dichloro-3,5-dimethylphenol (dichloroxylenol; dichloro-meta-xylenol; DCMX) 2.6.6 4-Chloro-3-methylphenol (para-chlorometa-cresol; PCMC) 2.6.7 Monochloro-2-phenylphenol 2.6.8 2-Benzyl-4-chlorophenol (chlorphen; ortho-benzyl-para-chlorophenol; OBPCP) 2.6.9 Mixed chlorinated xylenols 2.6.10 Other halophenols 2.6.11 Nitrophenols 2.6.12 Formulated disinfectants containing chlorophenols 2.6.13 Phenol 2.7 Pine disinfectants 2.8Theory of solubilized systems 2.9The bisphenols 2.9.1 Derivatives of dihydroxydiphenylmethane 2.9.2 Derivatives of hydroxydiphenylether 2.9.3 Derivatives of diphenylsulphide 3 Organic and inorganic acids: esters and salts 3.1