Stabilized crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate, process for producing the crystal, and agricultural chemical composition comprising the crystal
View Patent ↗An objective of the present invention is to provide a crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate having stable physicochemical properties. The objective is attained by a crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate that exhibits a diffraction peak pattern shown in FIG. 1 as determined by powder X-ray diffractometry.
1. A crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate that exhibits diffraction peaks at at least the following diffraction angles (2θ) as determined by powder X-ray diffractometry:
Diffraction angle (2θ)
5.3 ± 0.2°
6.9 ± 0.2°
8.5 ± 0.2°
10.0 ± 0.2°
10.3 ± 0.2°
11.3 ± 0.2°
20.3 ± 0.2°
21.0 ± 0.2°.
2. The crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate according to claim 1 , which further exhibits diffraction peaks at the following diffraction angles (2θ) as determined by powder X-ray diffractometry:
Diffraction angle (2θ)
12.2 ± 0.2°
16.6 ± 0.2°
17.1 ± 0.2°
18.4 ± 0.2°
22.5 ± 0.2°.
3. A process for producing the crystal according to claim 1 , the process comprising precipitating crystals from an alkanol solution of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate at a temperature of 40° C. or above.
4. A process for producing the crystal according to claim 1 , the process comprising adding water to an alkanol solution of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate and precipitating crystals therefrom at a temperature of 40° C. or above.
5. An agricultural chemical composition comprising the crystal according to claim 1 as an active ingredient.
6. The agricultural chemical composition according to claim 5 , further comprising a surfactant and water.
7. The agricultural chemical composition according to claim 5 , further comprising a surfactant and a solid carrier.
8. A process for producing the crystal according to claim 2 , the process comprising precipitating crystals from an alkanol solution of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate at a temperature of 40° C. or above.
9. A process for producing the crystal according to claim 2 , the process comprising adding water to an alkanol solution of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate and precipitating crystals therefrom at a temperature of 40° C. or above.
10. An agricultural chemical composition comprising the crystal according to claim 2 as an active ingredient.
11. The agricultural chemical composition according to claim 10 , further comprising a surfactant and water.
12. The agricultural chemical composition according to claim 10 , further comprising a surfactant and a solid carrier.