Лако-красочные материалы — производство

Confronted with the isolation of an organic compound which has either acidic or basic properties, and which therefore forms salts, the beginner is often in doubt as to whether the compound should be iso­lated in its free state or in the form of one of its salts. Since the literature frequently contains little helpful information on this point, it will be taken up here at some length in connection with the general problem of the most suitable methods for isolating compounds of various types.