1-Methyl 2-sulphooctadecanoate 3076-26-4 EINECS 221-354-4 METHYL 2-SULFOOCTADEXANOATE Methyl alpha-sulfostearate Methyl stearate alpha-sulfonic acid NSC 179468 Na Me alpha-sulfotallowate Octadecanoic acid, 2-sulfo-, 1-methyl ester