Tan Ri-hong
2005
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Journal
Chemical Reagents
Abstract
4-Amino-3-hydrazino-5-mercapto-1,2,4-trizole (Purpald) has been prepared by reaction of thiourea with hydrazine hydrate.Its structure was characterized by infrared spectra and (()~( 13)CNMR).The test showed that purpald was both sensitive and specific for aldehydes,the test was fast and easy to perform.