Sodium dodecyl sulfate is a kind of anionic surfactant, belongs to the typical representative of sulfuric acid ester surfactant, SDS for short, also known AS, K12, coconut oil, alcohol, sodium sulfate, lauryl sodium sulfate, foaming agent, sales of the commodity on the market are usually white to light yellow crystalline powder, non-toxic, slightly soluble in alcohol, insoluble in chloro-form, ether, soluble in water, with anionic and non-ionic complex compatibility is good, It has good emulsification, foaming, foaming, penetration, decontamination and dispersion properties, rich foam, rapid biodegradation, but the degree of water solubility is inferior to the fatty alcohol polyoxyethylene ether sodium sulfate (AES). Sodium dodecyl sulfate is the main component of dishwashing liquid. It is often used during DNA extraction to denature proteins and separate them from DNA.