| http://www.w3.org/ns/prov#value | - Other illustrative chelating acids that are useful include, polycarboxylic acids, for example, malonic, succinic, fumaric, maleic, citraconic, aconitic, o-phthalic, trimesic acids and other polycarboxylic acids having less than 3 carbon atoms separating the carboxylic groups; hydroxycarboxylic acids, for example, glycolic, lactic, beta-hydroxybutyric, gamma-hydroxybutyric, tartronic, malic, oxalac
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