Description

Alpha 4-Tolylene Diisocyanate 98 is a high-purity, reactive aromatic diisocyanate monomer essential for the synthesis of specialized polyurethane polymers. Its controlled reactivity and consistent quality make it a critical raw material for manufacturers requiring precise polymer properties and reliable performance. This compound is primarily utilized in the production of high-performance coatings, adhesives, sealants, and elastomers for demanding industrial applications.

Application

• Polyurethane Elastomers: Used as a key building block for high-performance, wear-resistant elastomers in automotive parts, industrial wheels, and mining equipment.
• Specialty Coatings & Paints: Serves as a cross-linking agent in two-component polyurethane coatings, providing excellent chemical resistance, durability, and gloss for industrial, marine, and automotive finishes.
• Adhesives & Sealants: A vital component in formulating high-strength, flexible polyurethane adhesives and sealants for construction, aerospace, and composite bonding applications.
• Casting & Encapsulation Resins: Employed in the production of potting and encapsulation compounds for electrical components, offering superior moisture and thermal protection.
• Polyurethane Foams (Specialty): Used in the manufacture of high-resilience and microcellular foams for technical applications requiring specific density and mechanical properties.
• Chemical Intermediate: Acts as a precursor for other chemical syntheses, including the production of blocked isocyanates, polyisocyanurates, and other modified isocyanate derivatives.

Basic Information

Product Name	Alpha 4-Tolylene Diisocyanate 98
CAS No.	99741-73-8
Molecular Formula	C9H6N2O2
Molecular Weight	174.16 g/mol
Synonyms	4-Tolylene Diisocyanate; 4-Methyl-m-phenylene Diisocyanate; 2,4-Toluene Diisocyanate Isomer; 4-Methyl-1,3-phenylene Diisocyanate; TDI-100; TDI (2,4-isomer); 2,4-TDI; 4-TDI; m-Tolylene Diisocyanate; 4-Methyl-m-phenylenediisocyanate
EINECS	Contact for details

Quality Control

Our Alpha 4-Tolylene Diisocyanate 98 is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed to meet precise specifications, with critical parameters including isomeric purity, assay, and controlled impurity levels. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). This product is hygroscopic (moisture-sensitive) and must be kept under a dry, inert atmosphere (e.g., nitrogen blanket) to prevent reaction with atmospheric moisture. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Isomer Content (2,4-TDI)	≥ 97.0%
Hydrolyzable Chlorine	≤ 0.01%
Acidity (as HCl)	≤ 0.005%
Color (APHA)	≤ 50
Specific Gravity (25°C/25°C)	1.21 - 1.22
Refractive Index (n20D)	1.565 - 1.568

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