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Phenolphthalein Paper

Phenolphthalein Paper

The test paper of phenolphthalein is mainly used for the detection of ammonia (NH3)
Instruction:
Remove the phenolphthalein test paper, moisten it with the distilled water, stick to the glass bar, close to the measured gas, and the test paper becomes red with ammonia.
Molecular formula: C20H14O4