Understanding the chemical underpinnings of essential compounds like 3-Methyl-1-Phenyl-2-Pyrazolin-5-One (CAS 89-25-8) is key for chemists and manufacturers. This pyrazolinone derivative, a crucial fine chemical, possesses a specific molecular structure and properties that dictate its wide-ranging applications.

The molecular formula for 3-Methyl-1-Phenyl-2-Pyrazolin-5-One is C10H10N2O, with a molecular weight of approximately 174.20 g/mol. Its structure features a phenyl group attached to a pyrazolinone ring, with a methyl group and a ketone functional group. This arrangement is responsible for its reactivity and utility as an intermediate.

Typically presented as a light yellow crystal or powder, its physical characteristics include a melting point in the range of 126-128 °C. This solid state at room temperature, along with its solubility properties, makes it manageable for various chemical processes. The synthesis of 3-Methyl-1-Phenyl-2-Pyrazolin-5-One generally involves cyclization reactions, often starting from precursors like phenylhydrazine and ethyl acetoacetate.

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