对氨基水杨酸是一种较好的抗结核药物,其钠盐配成注射液,在监床上用来治疗结核性脓胸或其它结核症。一般市场所出售的对氨基水杨酸钠,除有特殊标记者外,均为内服用,晚近又用其钙盐,也供内服用。就钠盐来说,由于质量不纯,所以不能用来配制注射液。为了解决这一问题,我们试用内服的对氨基水杨酸钠,经过重结晶的方法来精制它,使其质纯,以便用作配制不同浓度的注射液。查一般文献记载,就对氨基水杨酸钠的重结晶, P-aminosalicylic acid is a good anti-TB drug, its sodium salt dubbed injection, on the supervise the treatment of tuberculous empyema or other tuberculosis. Sodium p-aminosalicylate sold in the general market, except for special markers, are taken orally, and later with its calcium salt, also for internal use. For sodium salts, inaccurate quality can not be used to formulate injections. In order to solve this problem, we try orally sodium p-aminosalicylate to be purified by recrystallization to make it pure and pure, so that it can be used as an injection for preparing different concentrations. Check the general literature, on the amino acid salicylic acid recrystallization,