4,4'-Oxybis(phenyl isocyanate) CAS 4128-73-8

4,4'-Oxybis(phenyl isocyanate) is an aromatic diisocyanate containing two reactive isocyanate groups, with a molecular formula of C14H8N2O3 and molecular weight of 252.22 g/mol. It is used as a reactive intermediate in polyurethane and specialty polymer synthesis.

Visual State: Formulated as a colorless liquid state under ambient room conditions.

Assay Threshold: Maintained at a minimum purity level of 98.0% as measured via standard analytical methods.

Chemical Reactivity: Contains reactive isocyanate groups that can readily react with compounds containing active hydrogen, including water, alcohols, and amines.

Pharmaceutical Research: Utilized as a reactive intermediate in synthesizing compounds such as lipid-conjugated Smac analogs investigated in human breast cancer cell line studies.

Macroscopic Synthesis: Functions as a precursor in academic and industrial pathways targeting novel chiral macrocycles and specialized polymer networks.

Chemical Intermediates: Acts as a reactive building block in multi-step organic synthesis where dual isocyanate functionality is required.

Quality Systems: Manufactured in facilities certified to ISO 9001:2015 quality standards and ISO 14001 environmental management frameworks.

Sustainability Standards: Produced by an EcoVadis Gold-rated organization, satisfying corporate green supply chain and ESG procurement requirements.

Documentation Support: Comprehensive Safety Data Sheets (SDS), certificates of origin, and regulatory documentation provided to streamline import customs clearance.

Raw Material Verification: Incoming raw materials are checked against approved specifications before production to support consistent starting-material quality.

In-Process Monitoring: Key reaction and processing parameters are monitored according to established manufacturing procedures and product specifications.

Analytical Testing: Finished batches are tested using analytical instruments including HPLC and GC-MS, with assay, moisture content, and appearance evaluated as applicable.

Batch Traceability: Production records and analytical results are maintained for batch-level traceability throughout manufacturing and shipment.

COA Documentation: A batch-specific Certificate of Analysis (COA) can be provided with applicable analytical results and product specifications.

Multi-Site Manufacturing: Manufacturing bases in Zhejiang, Jiangsu, and Shandong support laboratory, pilot-scale, and commercial chemical production.

Scale-Up Capability: Production can be developed from kilogram-scale pilot batches to multi-ton annual capacity according to product and process requirements.

Production Equipment: Facilities include glass-lined reactors, hydrogenation systems, cryogenic equipment, pilot equipment, and small-scale testing systems.

Technical Support: A team of 15+ organic chemists supports route design, process optimization, scale-up, and custom synthesis projects.

Packaging Options: Standard industrial packaging configurations(1kg, 5kg, 25kg, 200kg) or customized packaging solutions available upon formal request.

Storage Guidelines: Store in a cool, dry, and well-ventilated area. Keep containers tightly sealed under an inert atmosphere for extended storage stability.

Transport Classification: Not classified as a regulated dangerous good for standard transit; shipped securely via air freight (IMDG/IATA compliant), sea freight, DHL, or FedEx.

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