Certain LOW MELTING POINT SOLIDS sometimes LIQUEFY when mixed together DUE to FORMATION OF EUTECTIC MIXTURE or LIBERATION OF WATER. e.g, if any 2 of the following medicaments are combined together, they form a eutectic mixture: Menthol, Thymol, Camphor, Phenol, Salol, Naphthol and chloral hydrate. Sodium salicylate Phenazone.