| http://www.w3.org/ns/prov#value | - Acid halides such asthionylchloride, sulfurylchloride, phosphorusoxychloride, phosphorus trichloride, acetylchloride and benzoylchloride; and acids such as hydrogen chloride or perfluorobutane sulfonic acid, are suitable as catalyst poisons for the phospholine oxidesparticularly preferred as carbodiimidization catalysts.
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