The invention provides a 3, 5-dihydroxy-4 '-pentylbiphenyl-
betaine eutectic as well as a preparation method and application thereof, and belongs to the technical field of
pesticide preparation. The invention provides a 3, 5-dihydroxy-4 '-pentylbiphenyl-
betaine eutectic which is formed by combining 3, 5-dihydroxy-4'-pentylbiphenyl and
betaine through an intermolecular
hydrogen bond, and a preparation method of the 3, 5-dihydroxy-4 '-pentylbiphenyl-betaine eutectic. According to the 3, 5-dihydroxyl-4 '-pentylbiphenyl-betaine eutectic and the preparation method thereof, the eutectic is formed by BP and BET, the
solubility and the
dissolution rate of BP are improved, the application amount of
pesticide molecules is reduced, and the 3, 5-dihydroxyl-4'-pentylbiphenyl-betaine eutectic is applied to various
plant pathogenic fungi. Results of the embodiment show that the co-crystals formed by BP and BET are combined through
hydrogen bonds in a
molar ratio of 1: 1, the
dissolution effect of the co-crystals is superior to that of the
medicine, and the
dissolution effect is not affected by the pH environment. Compared with drugs with the same concentration and the
drug eutecticum, the
drug eutecticum shows the
antibacterial activity advantage superior to that of original
drug molecules.