Fluorescein test for

The fluorescein test for succinic acid (p. 349) and the phthalein and fluorescein tests for phthalic acid (p. 351) are obviously given also by succinic anhydride and phthalic anhydride, as these tests depend upon the initial formation of the anhy dride in each case. 

Chlorides do not affect the fluorescein test for bromides. Thus bromides may be detected in the presence of even large amounts (up to 1 10,000) of chlorides.2 Iodides, however, are oxidized to free iodine which forms red tetraiodofluorescein (erythrosine). In this case, the bromide can be identified by procedure (c). 

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