Description

4,4'-Methylenebis(Phenyl Isocyanate) (CAS NO 26447-40-5) is a key aromatic diisocyanate monomer essential for producing high-performance polyurethane materials. Its chemical structure provides the necessary reactivity and rigidity for creating polymers with excellent mechanical properties and thermal stability. This product is primarily required by manufacturers in the polyurethane foam, elastomer, adhesive, and coating industries seeking to enhance product durability and performance.

Application

• Production of rigid and semi-rigid polyurethane foams for insulation and automotive parts.
• Synthesis of polyurethane elastomers for industrial wheels, rollers, and seals.
• Manufacturing of high-performance adhesives and sealants with strong bonding properties.
• Formulation of polyurethane coatings and paints for industrial and protective applications.
• Creation of binder systems for foundry sands and composite materials.
• Cross-linking agent in specialty polymer and resin modifications.

Basic Information

Product Name	4,4'-Methylenebis(Phenyl Isocyanate)
CAS No.	26447-40-5
Molecular Formula	C15H10N2O2
Molecular Weight	250.25 g/mol
Synonyms	MDI; Methylene diphenyl diisocyanate; Diphenylmethane diisocyanate; 4,4'-Diphenylmethane diisocyanate; Methylene bis(4-phenyl isocyanate); Bis(4-isocyanatophenyl)methane; Isonate; Desmodur; Hylene
EINECS	247-714-0

Quality Control

Our 4,4'-Methylenebis(Phenyl Isocyanate) is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including assay, isomer content, and hydrolyzable chlorine determination. Certificates of Analysis (COA) documenting full specifications are available for every batch upon request, supporting your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures typically between 15-25°C. This material is hygroscopic (moisture-sensitive) and must be protected from atmospheric moisture to prevent polymerization and degradation. Keep away from strong bases and incompatible organic solvents.

Specification

Item	Specification
Appearance	White to pale yellow solid or fused solid
Assay (by Titration)	≥ 99.5 %
4,4'-Isomer Content	≥ 98.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Acidity (as HCl)	≤ 0.01 %
Melting Point	38 - 41 °C

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