Description

Isonate 143L is a specialized isocyanate compound, identified by CAS NO 39394-41-7, widely recognized for its role as a key building block in polymer synthesis. Its consistent quality and reactivity make it a critical raw material for manufacturers requiring reliable performance in demanding formulations. This product is essential for industries focused on producing high-performance polyurethane foams, elastomers, coatings, and adhesives.

Application

• Primary component in the production of flexible and rigid polyurethane foams for insulation, automotive seating, and furniture.
• Synthesis of high-performance polyurethane elastomers used in industrial wheels, seals, and gaskets.
• Manufacturing of durable coatings and adhesives with excellent chemical and abrasion resistance.
• Key raw material for binders and sealants in construction and automotive assembly applications.
• Used in the formulation of specialty paints and varnishes that require enhanced durability and flexibility.
• Production of synthetic leather and textile coatings to improve finish and performance.

Basic Information

Product Name	Isonate 143L
CAS No.	39394-41-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Diphenylmethane diisocyanate, MDI; Methylene diphenyl diisocyanate; 4,4'-Diphenylmethane diisocyanate; Methylene bis(4-phenyl isocyanate); Isonate 143L; MDI monomer; 4,4'-MDI; Methylene dianiline diisocyanate
EINECS	Contact for details

Quality Control

Our Isonate 143L is manufactured under strict quality management systems to ensure batch-to-batch consistency and purity. Each lot undergoes rigorous analytical testing, including assay and impurity profile analysis, to meet precise industry specifications. A Certificate of Analysis (COA) documenting all critical parameters is available for every shipment upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent contact with atmospheric moisture. Store away from heat, open flames, and incompatible materials such as amines, alcohols, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (NCO Content)	≥ 99.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Acidity (as HCl)	≤ 0.01 %
Viscosity @ 25°C	Contact for details
Specific Gravity @ 25°C	Contact for details

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