| http://www.w3.org/ns/prov#value | - Especially preferred are potassium and tetra(lower)alkylammonium salts of monoalkanoic acids having from 2 to 6 carbon atoms, such as potassium acetate, potassium n-propionate, potassium isopropionate, potassium n-butyrate, potassioum t-butyrate, potassium n-pentanoate, potassium n-hexanoate, tetramethylammonium acetate, tetrahexylammonium acetate, and the like.
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