| http://www.w3.org/ns/prov#value | - As the organic carboxylic acid used as the counter anion, for example, monocarboxylic acid such as formic acid, acetic acid, propionic acid, butanoic acid, octanoic acid; dicarboxylic acid such as oxalic acid, malonic acid, or succinic acid; hydroxycarboxylic acid such as lactic acid, glycollic acid, tartaric acid, or citric acid; or halogen-substituted carboxylic acid such as monochloroacetic aci
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