powder
In the process of custody, if it absorbs moisture and agglomerates, it needs to be placed in a cool and ventilated place to dry and be crushed before it can be used. If agglomeration is serious, it can only be used as toxic soil.
WP
1 Take 1 part of wettable powder, add 200 parts of water, and put it in a glass. Shake well and wait for a certain period of time to observe the suspension. If the drug precipitates slowly, it means that the suspension is good and can continue to be used. 2 In case of poor quality, silicone additives or 0.1% neutral detergent powder should be added before use to increase the wetness. If the wettable powder binds to a hard block, it should not be used as a spray.
Emulsion 1 EC emulsifying properties change. Take 1 part of EC, add 200 parts of water and place it in a glass. Shake well and stand for about half an hour. Observe the emulsification. If there is no slick in the upper layer, there will be no precipitate in the lower layer and no oil bead in the middle, indicating good emulsifying performance. If there is emulsifiable concentrate on it and there is sedimentation, there will be stratification after 10 minutes, indicating that the emulsion cannot be used. 2 caking phenomenon. If the emulsifiable concentrate has been a non-flowable viscous liquid or has formed a soapy solid, it is proved that the solvent has mostly volatilized and the quality has changed and cannot be used. 3 precipitation crystallization phenomenon. For long-term storage of the emulsion, white crystals or turbid substances may appear on the bottom of the bottle. If the emulsion cream bottle is immersed in warm water at 30°C to 40°C, the crystals can be dissolved in about 30 minutes to return to a transparent liquid, indicating that the quality is good and can be used continuously. If it does not dissolve, it indicates that the quality of the emulsifiable concentrate has changed and cannot be used. Http://Content/65e4087c-6932-4c4b-821b-7ac5d1846475?cType=2
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