Surfactant classification

1. Anionic surfactant

(1) Higher fatty acid salts: they are soaps, stearic acid, oleic acid, and lauric acid are more common.

(2) Sulfates: mainly sulfated oils and higher fatty alcohol sulfates. Sulfated castor oil, sodium lauryl sulfate (also called sodium lauryl sulfate), sodium cetyl sulfate, sodium octadecyl sulfate.

(3) Sulfonates: sodium dioctyl succinate and sodium dodecylbenzene sulfonate.

2. Cationic surfactant

Quaternary ammonium compounds: benzalkonium chloride, benzalkonium bromide.

3. Zwitterionic surfactant (1) Lecithin: soybean lecithin and egg lecithin (2) amino acid type and betaine type.

4. Non-ionic surfactants (1) Fatty acid monoglyceride, monostearic acid, etc. (2) Sucrose fatty acid ester.

(3) Fatty acid sorbitan (spans)

(4) Polysorbate (Tween)

(5) Polyoxyethylene fatty acid ester (Mai Ze) is an oil-in-water emulsifier.

(6) Polyoxyethylene fatty acid ether (benzyl), commonly used as solubilizer and O/W emulsifier.

(7) Polyoxyethylene-polyoxypropylene copolymer (poloxamer)