水乳剂也称浓乳剂,由不溶于水的液体原药或固体原药溶于有机溶剂混合制得的液体再与乳化剂混合所形成的微小液滴分散于水中形成粒径为数微米的乳状液制剂。它与用水稀释后形成乳状液的乳油不同,系乳状液的浓溶液。通常有效成分1%～60%,乳化剂2%～10%。与乳油相比,水乳剂用水代替了大部分的有机溶剂,制剂的成本大 Water emulsion also known as concentrated emulsion, insoluble in water by the original drug or solid original drug dissolved in organic solvent mixture of liquid and then mixed with the emulsifier formed droplets dispersed in water to form a particle size of several microns of the emulsion preparation. It is diluted with water to form an emulsion of emulsifiable concentrate, Department of emulsion concentrated solution. Usually active ingredients 1% ~ 60%, emulsifier 2% ~ 10%. Compared with EC, the water emulsion replaces most of the organic solvent with water, and the cost of the preparation is large