Application and preparation of benzotriazole_Kain Industrial Additive

background and overview[1-2] benzotriazoles are white to light pink crystals, soluble in alcohol, benzene, toluene, chloroform, and slightly soluble in water. oxidation in air gradually turns red. can explode when distilled in vacuum. the preparation method of benzotriazole is usually to diazotize o-phenylenediamine to prepare o-aminobenzene diazonium salt, and then immediately cyclize it in one step to synthesize the crude benzotriazole, which is then recrystallized, filtered,…