Spans emulsifiers can be used as emulsifiers in the preparation of creams, emulsions and ointments, and can be used alone to prepare stable water-in-oil emulsions or microemulsions; if combined with chemicalbook hydrophilic emulsifier Tween in different proportions When used, various water-in-oil, oil-in-water emulsions or creams can be prepared; it can also be used as a solubilizer, wetting agent, dispersant, suspending agent, and the like.