| http://www.w3.org/ns/prov#value | - Preferred additives include alcohols such as methanol, ethanol, butanol, propanol, glycols, water soluble esters and ethers, surfactants such as non-ionic ethylene oxide, propylene oxide and copolymers thereof, alkyl surfactants such as the Tergitol family surfactants, or the Triton family of surfactants, or surfactants with ethylene oxide and propylene oxide or butylene oxide units.
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