p-Toluenesulfonyl hydrazide alias 4-methylbenzenesulfonylhydrazide, is a white crystalline powder, soluble in alkali, soluble in methanol, ethanol and butanone, slightly soluble in water, aldehydes, insoluble in benzene, toluene. Used as a foaming agent for natural rubber, synthetic rubber and multi-chemicalbook plastics, so that plastics and rubber products produce fine closed-cell structure, small shrinkage of products, high tear strength, and is also an important organic synthesis intermediate, used in organic synthesis such as medicine and pesticide production.