Description

1-Methyl-1H-Pyrazolo[4.3-D]Pyridazin-4(5H)-One is a high-purity heterocyclic organic compound that serves as a critical advanced intermediate in modern pharmaceutical synthesis. This compound matters because it provides a versatile and structurally defined scaffold for developing novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring complex nitrogen-containing heterocycles. Pharmaceutical R&D and fine chemical manufacturers need it for the efficient production of target molecules in drug discovery and process development pipelines.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and anti-inflammatory targets.
• Agrochemical Research: Used in the development of new-generation herbicides and pesticides that leverage its fused pyrazolopyridazine core.
• Organic Synthesis Reagent: Serves as a versatile precursor for constructing complex polyheterocyclic systems in academic and industrial research.
• Material Science Exploration: Investigated as a potential monomer or functional additive for creating specialty polymers with unique electronic properties.
• Biochemical Probe Development: Utilized in medicinal chemistry to create tool compounds for studying enzyme inhibition and biological pathways.

Basic Information

Product Name	1-Methyl-1H-Pyrazolo[4.3-D]Pyridazin-4(5H)-One
CAS No.	40995-46-8
Molecular Formula	C7H6N4O
Molecular Weight	162.15 g/mol
Synonyms	1-Methyl-1H-pyrazolo[4,3-d]pyridazin-4(5H)-one; 1-Methyl-4,5-dihydro-1H-pyrazolo[4,3-d]pyridazin-4-one; 4(5H)-Pyrazolo[4,3-d]pyridazinone, 1-methyl-; 1-Methyl-4,5-dihydropyrazolo[4,3-d]pyridazin-4-one; 1-Methyl-1,4-dihydropyrazolo[4,3-d]pyridazin-4-one; 40995-46-8; 1-Methylpyrazolo[4,3-d]pyridazin-4(5H)-one
EINECS	Contact for details

Quality Control

Our 1-Methyl-1H-Pyrazolo[4.3-D]Pyridazin-4(5H)-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for pharmaceutical R&D. A comprehensive Certificate of Analysis (COA) detailing purity, impurities, and physical characteristics is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials. For long-term storage, consider an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.