卤化试剂 Halogenating reagents： 在单质或化合物中引入卤素原子以产生卤化物的反应试剂。常见的卤化反应有烷烃的卤化，芳烃的芳环卤化和侧链卤化，醇羟基和羧酸羟基被卤素取代，醛、酮等羰基化合物的α-活泼氢被卤素取代，卤代烃中的卤素交换等。在有机化学中，卤化反应最重要的目的之一是通过卤基（主要是-Cl、-Br）水解、醇解和氨化引入其他基团。
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