| http://www.w3.org/ns/prov#value | - A surfactant such as a polyoxyethylene alkyl ether, polyoxyl castor oil, tyloxapol, alkyl aryl ether sulfonate, lecithin, sorbitan esters, glyceryl monostearate, cetyl alcohol, octoxynol-9, nonoxynol-9, polyoxyethylene stearates, polyoxyethylene sorbitan fatty acid esters such as polysorbate 20, 60 and 80 or others may also be employed.
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