| http://www.w3.org/ns/prov#value | - In U.S. Pat. No. 4,130,636 to Tomlinson of Colgate-Palmolive Company, a dentifrice is taught wherein the surface active system includes a surfactant of the formula R--(OCH2 CH2)x --OCH2 COOM wherein R is a C8 -C18 alkyl chain, x is an integer 1-9 and M ia a non-toxic alkali or alkaline earth metal, ammonium or C2 to C3 alkylol amine.
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