Aqueous suspended agricultural chemical composition

Details Aqueous suspended agricultural chemical composition Aqueous suspended agricultural chemical composition

2008-05-08

2010-11-30

Pryor, Alton N (Department: 1616)

Plant protecting and regulating compositions

Plant growth regulating compositions

Organic active compound containing

Reexamination Certificate

active

07842648

ABSTRACT:
The present invention relates to an aqueous suspended agricultural chemical composition wherein component (a) is ethyl(R)-2-[4-(6-chloroquinoxalin-2-yloxy)phenoxy]propionate of which the ratio of β-type crystal is 80% by weight or more, component (b) is surfactant and component (c) is water. An aqueous suspended agricultural chemical composition of the invention has good flowability and the growth of quizalofop-p-ethyl particle is small, resulting in high preservation stability under severe preservation condition.

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K. Miyake et al.,Crystallization Behaviors of α- and β-Quizalofop- ethyl Polymorphs in Homogeneous Nucleation, ACS Symp. Ser., (1997) 667 (Separation and purification by crystallization), p. 101-110.
G. Sakata et al.,Preparation of optically pure ethyl(R)-(+)and(S)-(−)-2[4-(6-Chloro-2-quinoxalinyloxy)phenoxy] propanoate by resolution method and their herbicidal activities, J. Pesticide Sci., (1985) 10(1) p. 75-79.
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