Process for the preparation of 2 - (4 - chloro - 2 - metilfenilimino) - 3 - methyl - tiazolidino - hemihidrato crystalline compound thus obtained, bath, the pesticide and process for its preparation.The process pesticide, and crystalline hydrates

摘要

Crystalline 2-(4-chloro-2-methylphenylimino)-3-methylthiazolidine (I) hemihydrate is new. Also new are animal dips contg. crystals of (I) hemihydrate, and agents against mange mites and ticks contg. crystalline (I) hemihydrate. Crystalline (I) hemihydrate is produced by adding (I) or (I)-contg. formulations to water. Anhydrous (I) is a known oily substance with tickicidal activity. (I) hemihydrate is crystalline and is more readily converted into formulations such as wettable powders and suspension concentrates than is the anhydrous compound. A particular advantage of crystalline (I) hemihydrate is that animal dips contg. suspended crystals of the hemihydrate are not subject to a "stripping effect" (i.e. the crystals of active substance and the suspending fluid are removed from the dip by the animals at the same rate, so that the dip can be replenished with further suspension having the same concentration as the original dip.