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Chemical name Pyrazole
Chemical formula C3H4N2
Synonyms 1,2 diazole, Pyrazol
Molecular mass 68.07 g/mol
Melting point 66-70 C
Boiling point 186-188 C
Density g/cm3
CAS number 288-13-1
Chemical structure of pyrazole
Disclaimer and references

Pyrazole refers both to the class of simple aromatic ring organic compounds of the heterocyclic series characterized by a 5-membered ring structure composed of three carbon atoms and two nitrogen atoms in adjacent positions and to the unsubstituted parent compound. Being so composed and having pharmacological effects on humans, they are classified as alkaloids although they are not known to occur in nature.

Pyrazoles are produced synthetically through the reaction of α,β-unsaturated aldehydes with hydrazine and subsequent dehydrogenation.

Pyrazoles are used for their analgesic, anti-inflammatory, antipyretic, antiarrhythmic, tranquilizing, muscle relaxing, psychoanaleptic, anticonvulsant, monoamineoxidase inhibiting, antidiabetic and antibacterial activities.

Structurally related compounds are pyrazoline and pyrazolidine.

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