Dye intermediates. 5-aminosalicylic acid (5-ASA drug name is MASALAZINE) is an important pharmaceutical and dye chemical raw material. It is also the main raw material of sulfasalazine, a drug for the treatment of chronic colitis. 5-aminosalicylic acid has three active reactive groups: hydroxyl group and carboxyl group on the ring, which can carry out a variety of reactions. Therefore, in the dye industry, it can be used to produce a variety of high-quality reactive dyes. Also used in the manufacture of photosensitive paper.
It is used as intermediate of azo and sulfurized dyes and in the manufacture of photographic paper
It can significantly inhibit the inflammation of intestinal wall; Mesalazine can inhibit the synthesis of inflammatory prostaglandins and the formation of inflammatory mediators leukotrienes, thus significantly inhibiting the inflammation of intestinal mucosa. It has better effect on the connective tissue of inflammatory intestinal wall. For ulcerative colitis, ulcerative proctitis and Crohn's disease.
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