1,3-dimethyl-1H-pyrazole-5-carbohydrazide(CAS: 89187-40-6)

1,3-dimethyl-1H-pyrazole-5-carbohydrazide is a white crystalline solid with a molecular weight of approximately 200.22 g/mol. It is slightly soluble in water but has good solubility in organic solvents like ethanol and acetone. Chemically, it is stable under normal conditions but can hydrolyze to form 1,3-dimethyl-1H-pyrazole-5-carboxylic acid under acidic conditions. It exhibits moderate reactivity with nucleophiles and can be used in various synthetic transformations.

1,3-dimethyl-1H-pyrazole-5-carbohydrazide is commonly synthesized by the condensation of 1,3-dimethyl-1H-pyrazole-5-carboxaldehyde with hydrazine. The reaction is typically carried out in the presence of an acid catalyst like hydrochloric acid at room temperature. The yield is usually around 60-70%, and the product is purified by recrystallization from ethanol.

1,3-dimethyl-1H-pyrazole-5-carbohydrazide is used in the pharmaceutical industry as a precursor for the synthesis of certain bioactive molecules. It also finds applications in the polymer industry for the development of functional polymers and in the chemical industry for the production of various organic compounds. Additionally, it is used in the sensor industry for the development of gas sensors.

When handling 1,3-dimethyl-1H-pyrazole-5-carbohydrazide, it is important to wear appropriate personal protective equipment (PPE) such as gloves, safety goggles, and a lab coat. Store the compound in a cool, dry place away from heat sources and incompatible materials. Use a fume hood during synthesis and handling to minimize exposure to fumes. In case of a spill, follow the guidelines in the safety data sheet (SDS) for proper cleanup and disposal. Keep the compound away from children and unauthorized personnel.