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Publication of PL213532B1publicationCriticalpatent/PL213532B1/en
Coloured ammonium ionic liquids with 4-[(3-carboxyl-2-hydroxynaphthalene-1-yl)diazenylo]-3-hydroxynaphthalene-1-sulphonic anion and process for the preparation thereof
Colored pyridinium ionic liquids with 4-[(3-carboxyl-2-hydroxynaphthalene-1-yl)diazenylo]-3-hydroxynaphthalene-1-sulphonic anion and process for the preparation thereof