Coal Tar Phenols : The mixture of those constituents of coal tar or of coal tar fractions which are soluble in aqueous caustic soda solution. The mixture consists essentially, but not always entirely, of monohydric phenols
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}