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Crystallised Phenol and Cresylic Acid from Crude Carbolic Acid, Lunge 1887
Crude carbolic acid is dried and fractionally distilled: phenol comes over first and crystallises in the cold, while cresylic acid (the cresols) boils higher and stays liquid. Drained, treated with a little strong sulfuric acid and distilled again, the crystals give white crystallised carbolic acid (Lunge, 1887). Phenol burns skin and is poisonous.
The picture: our diagram of the fractions.
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