http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359quaternary ammonium compounds http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359 compounds BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359 QACs UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359 compounds, quaternary ammonium UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359 quaternary ammonium compound UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359 quaternary ammonium salts UF