The optimal conditions for synthesis of alkali green 4 are reported,including the carbamide and zinc chloride as catalyst,chloranil and bichrome as oxidation agent in the acetic acid medium.

• 报道了合成碱性绿-4的最佳条件:在醋酸介质中,尿素、氯化锌为催化剂,四氯苯醌和重铬酸钾为氧化剂;