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pyrazolone

[ pi-raz-uh-lohn, pahy- ]

noun

, Chemistry.
  1. any of the group of heterocyclic compounds containing the pyrazoline ring in which one carbon atom is doubly linked to an oxygen atom not in the ring.
  2. the parent compound, C 3 H 4 N 2 O.


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Word History and Origins

Origin of pyrazolone1

First recorded in 1885–90; pyrazole + -one
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Example Sentences

When the reaction is complete the acid is neutralized with soda, and the phenyl methyl pyrazolone extracted with ether and distilled in vacuo.

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pyrazolinepyrazolone dye