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Sodium alkyl ॅ‐sulfopelargonates, C 7 H 15 CH(SO 3 Na)CO 2 R. Wetting and related properties
Author(s) -
Stirton A. J.,
Bistline R. G.,
Weil J. K.,
Ault Waldo C.
Publication year - 1962
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02633353
Subject(s) - chemistry , alkyl , hydrolysis , steric effects , sodium , alcohol , wetting , alkaline hydrolysis , organic chemistry , nuclear chemistry , medicinal chemistry , chemical engineering , engineering
A series of sodium alkyl ॅ‐sulfopelargonates prepared from sodium ॅ‐sulfopelargonic acid and alcohols of from 2 to 12 carbon atoms were examined for surface active properties. Esters with the hydrophilic portion in the middle of the molecule, as in sodium hexyl, heptyl octyl, capryl (or 2‐octyl) and 2‐ethylhexyl ॅ‐sulfopelargonate were very efficient wetting agents with good foaming properties and a c.m.c. of from 2 to 7 millimoles per liter. The presence of the ॅ‐sulfo group inhibits hydrolysis of the ester linkage, apparently by steric hindrance. Sodium capryl ॅ‐sulfopelargonate, an ester of a secondary alcohol, was particularly stable to acid and alkaline hydrolysis. The esters are easily soluble in water, organic solvents and mineral oil.