Description

Methylene Diisocyanate CAS NO 4747-90-4 is a versatile and highly reactive organic compound belonging to the diisocyanate family. This chemical is a critical building block in the synthesis of high-performance polymers, valued for its ability to form strong, durable urethane linkages. It is essential for manufacturers in the polyurethane, coatings, and specialty adhesives industries seeking to enhance product durability and chemical resistance. Its high reactivity makes it a key intermediate for creating tailored polymeric materials with specific mechanical and thermal properties.

Application

• Polyurethane Synthesis: A fundamental monomer for producing polyurethane foams, elastomers, and coatings, offering excellent mechanical strength and flexibility.
• Specialty Adhesives & Sealants: Used in formulating high-performance adhesives and sealants that require strong bonding and resistance to environmental factors.
• Industrial Coatings: Serves as a cross-linking agent in coatings for automotive, industrial, and protective applications, providing enhanced abrasion and chemical resistance.
• Polymer Modification: Acts as a key intermediate for modifying and curing various polymers to improve their thermal stability and mechanical properties.
• Chemical Intermediate: Employed in organic synthesis for pharmaceuticals, agrochemicals, and other fine chemicals requiring isocyanate functionality.
• Composite Materials: Used in the production of fiber-reinforced plastics and composite materials for the aerospace and automotive sectors.

Basic Information

Product Name	Methylene Diisocyanate
CAS No.	4747-90-4
Molecular Formula	C3H2N2O2
Molecular Weight	98.06 g/mol
Synonyms	MDI (Methylene Diisocyanate); 1,3-Diisocyanatomethane; Methane Diisocyanate; Methylene Bis(isocyanate); Isocyanic Acid, Methylene Ester; Desmodur 44; Nacconate 300; 1,3-Diisocyanato-2-methylbenzene (common misnomer, verify context); Methylene Di-isocyanate
EINECS	225-268-8

Quality Control

Our Methylene Diisocyanate is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests including chromatography (HPLC, GC) and titration methods. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Due to its highly volatile and reactive nature, store in a cool, well-ventilated area away from heat, sparks, and open flames. Keep container tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture absorption and polymerization. Recommended storage temperature is 2-8°C (36-46°F) to maintain stability and extend shelf life. Isolate from amines, alcohols, water, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
Hydrolyzable Chlorine	≤ 0.1 %
Total Chlorine	≤ 0.5 %
Color (APHA)	≤ 50
Specific Gravity (20°C)	1.22 - 1.24
Viscosity (25°C)	Contact for details

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