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研究了影响７５％百菌清可湿粉悬浮率不稳定的因素，找到了提高悬浮率稳定性的方法并应用于生产。当百菌清原药含量≥９２％，且原药中二腈含量≤０．４％时，热贮之后的悬浮率大于６０％；若百菌清原药含量＜９０％，且二腈含量≥２％时，热贮之后的悬浮率≤５０％。配方对悬浮率的稳定性影响很大。
The factors affecting the suspension rate of 75% Chlorothalonil WP were studied, and the methods to improve the stability of suspension rate were found and applied to the production. When the content of chlorothalonil is above 92%, and the content of dinitrile in the original drug is less than or equal to 0.4%, the suspension rate after thermal storage is more than 60%. If the content of chlorothalonil is less than 90% and the content of dinitrile is more than 2 %, The suspension after heat storage rate ≤ 50%. Formulation has a great influence on the stability of the suspension rate.