Overview
2-Indolinone, also known as 2-oxoindoline, is a heterocyclic organic compound with significant industrial importance. As a versatile intermediate, it serves as a building block in the synthesis of various pharmaceuticals, agrochemicals, and specialty chemicals. Its molecular structure features a benzene ring fused to a pyrrolidone ring, making it a valuable scaffold in medicinal chemistry. The industrial-grade variant is commonly used in large-scale chemical processes, where purity levels of 98-99% are typically required. Its role in the synthesis of kinase inhibitors and other bioactive molecules has driven consistent demand in the B2B chemical market.
Physical and Chemical Properties
2-Indolinone presents as a white to off-white crystalline solid at room temperature, with a characteristic mild odor. The compound demonstrates moderate solubility in polar organic solvents like ethanol and DMSO, while being only slightly soluble in water. This solubility profile makes it suitable for various organic reactions in industrial settings. Chemically, 2-indolinone is relatively stable under normal storage conditions but can react with strong oxidizing agents. Its melting point range of 128-132°C provides a key quality control parameter for industrial buyers. The compound's stability allows for long-term storage when proper conditions are maintained.
Main Applications
The primary application of 2-indolinone lies in pharmaceutical synthesis, particularly as a precursor for kinase inhibitors and other bioactive molecules. Many FDA-approved drugs contain the indolinone moiety, making this compound crucial for pharmaceutical manufacturers. It's also used in the development of anticancer agents and neurological medications. In agrochemical production, 2-indolinone serves as an intermediate for certain herbicides and plant growth regulators. The compound's versatility extends to organic synthesis, where it's employed in constructing complex heterocyclic systems. Industrial buyers should note that application requirements often dictate specific purity grades and particle size distributions.
Safety and Storage
While 2-indolinone isn't classified as extremely hazardous, proper safety measures are essential in industrial handling. The compound may cause irritation to skin, eyes, and respiratory system upon exposure. Appropriate PPE including gloves, goggles, and respirators should be used when handling the powder form. For storage, maintain the material in tightly sealed containers under cool (below 30°C), dry conditions. Protect from moisture and direct sunlight to prevent degradation. Industrial facilities should implement proper ventilation systems and have spill containment measures in place, as the fine powder can become airborne during handling operations.
B2B Procurement Guide
When procuring industrial-grade 2-indolinone, buyers should prioritize suppliers with certified manufacturing facilities and documented quality control processes. Key specifications to verify include purity (typically 98-99%), heavy metal content, and residual solvent levels. Batch-to-batch consistency is crucial for pharmaceutical applications. For large-volume purchases (metric ton quantities), consider establishing long-term supply agreements with reputable manufacturers, preferably those with multiple production sites for supply chain resilience. Pricing varies based on order volume, with discounts commonly available for contract purchases. Always request current certificates of analysis and ensure compliance with relevant industry standards for your specific application.
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