Are the compounds that closely resemble LAS in term of solubility, solubilizing poerties, wetting power and other detergency properties. Therefor, SAS can largely be substituted for LAS in most formulations.Are completely insenstive to hydrolysis even at extreme pH values, a result of the presence of the strable carbonsulfar bond. The water hardness sensitivity and foaming characteristics of SAS largely resemble thosi of LAS those of LAS, as discussed above.Another class of anionic surfactants is the fatty acid easter, particulary the methyl derivaties. This group of surfactants is also called methyl ester sulfonates. This group of surfactants is also called methyl ester sulfonates.Methyl ester sulfonates are derived from a variety of methyl ester feedstocks from renewable resources, such as coconut, palm kernel, palm stearin, beef tallow, lard, and soy. Good detergency performance is attained with products having rather long hydrophobic residues. The sensitivity of MES to water hardness is small relative to that of LAS and SAS more closely resembling that of AOS. One of the interesting detergency porperties of sulfo fatty acid methyl esters os their exceptional dispersion power with respect to lime soap
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