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deze stoffen behoren tot chemische klassen als alifatische nitrosamines met een korte keten, divalente metalen, aldehyden, azokleurstoffen en diazoverbindingen, pyrollizidine-alkaloïden, allylverbindingen en nitroverbindingen (3).
these substances belong to chemical classes that include short chain aliphatic nitrosamines, divalent metals, aldehydes, azo-dyes and diazo compounds, pyrollizidine alkaloids, allyl compounds and nitro compounds (3).