Description

Naphthalene Diisocyanate CAS NO 25551-28-4 is a key aromatic diisocyanate monomer used in the production of high-performance polyurethane materials. Its chemical structure provides enhanced thermal stability and mechanical properties to the resulting polymers, making it a critical component for demanding applications. This product is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced material research and development.

Application

• High-Performance Polyurethane Coatings: Used in the formulation of industrial, marine, and automotive coatings requiring excellent chemical resistance, durability, and weatherability.
• Specialty Adhesives and Sealants: Serves as a key raw material for adhesives and sealants that demand strong bonding, flexibility, and resistance to harsh environments.
• Elastomers and Thermoplastic Polyurethanes (TPU): A vital component in the synthesis of elastomers and TPUs for applications like industrial wheels, gaskets, and high-resilience components.
• Rigid and Flexible Foams: Employed in the production of specialized polyurethane foams where enhanced thermal stability and flame retardancy are required.
• Cross-linking Agent for Polymers: Acts as an effective cross-linker to improve the hardness, scratch resistance, and overall performance of various polymer systems.
• Chemical Intermediate: Used in organic synthesis for the production of other specialty chemicals, including agricultural and pharmaceutical intermediates.

Basic Information

Product Name	Naphthalene Diisocyanate
CAS No.	25551-28-4
Molecular Formula	C12H6N2O2
Molecular Weight	210.19 g/mol
Synonyms	1,5-Naphthalene Diisocyanate; NDI; 1,5-Diisocyanatonaphthalene; Naphthalene-1,5-diisocyanate; Desmodur 15; Baymidur KA 8514; Naphthylene-1,5-diisocyanate; 1,5-Naphthylene Diisocyanate
EINECS	247-096-2

Quality Control

Our Naphthalene Diisocyanate is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including assay, isocyanate content determination, and impurity profiling. A Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment to guarantee compliance with your technical requirements.

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) 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	White to pale yellow crystalline solid
Identification (IR)	Conforms
Assay (NCO Content)	≥ 99.0 %
Purity (HPLC)	≥ 98.5 %
Melting Point	126 - 130 °C
Hydrolyzable Chloride	≤ 0.01 %
Total Chlorine	≤ 0.05 %
Heavy Metals (as Pb)	≤ 10 ppm

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