Description

5-Ethylidene-2-norbornene (CAS NO 16219-75-3) is a specialized, high-purity diene monomer essential for the synthesis of advanced polymers. Its primary value lies in its role as a termonomer in the production of ethylene propylene diene monomer (EPDM) rubber, where it imparts superior crosslinking efficiency and enhanced vulcanization properties. This compound is critically needed by manufacturers in the synthetic rubber, specialty elastomers, and advanced polymer industries seeking to improve product durability, weather resistance, and processing characteristics.

Application

• Primary termonomer in the manufacture of Ethylene Propylene Diene Monomer (EPDM) rubber for automotive seals, hoses, and weatherstripping.
• Key intermediate in the synthesis of specialty elastomers and hydrocarbon resins with tailored properties.
• Used in the production of oil-resistant and heat-resistant rubber compounds for industrial applications.
• Component in the formulation of polymer modifiers and impact improvers for plastics.
• Employed in crosslinking and curing agent systems for advanced polymeric materials.
• Research and development of novel copolymer structures in academic and industrial laboratories.

Basic Information

Product Name	5-Ethylidene-2-Norbornene
CAS No.	16219-75-3
Molecular Formula	C9H12
Molecular Weight	120.19 g/mol
Synonyms	5-Ethylidenebicyclo[2.2.1]hept-2-ene; ENB; 5-Ethylidene-2-norbornene; 2-Norbornene, 5-ethylidene-; Ethylidene norbornene; 5-Ethenylidene-2-norbornene; 5-Ethylidenenorborn-2-ene
EINECS	240-347-7

Quality Control

Our 5-Ethylidene-2-norbornene is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, purity, and impurity profiles. Our quality commitment aligns with industrial and technical grade specifications, and we can support customer-specific requirements upon request.

Storage

Preserve in a tightly closed container, protected from light. Due to its highly volatile and easily oxidized nature, this product should be stored under an inert atmosphere (e.g., nitrogen) in a cool, well-ventilated place. Recommended storage temperature is 2-8°C to minimize degradation and maintain stability. Keep away from heat, sparks, and open flames.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0 %
Water Content (KF)	≤ 0.1 %
Peroxide Value	≤ 10 meq/kg
Specific Gravity (20°C)	0.900 - 0.910
Refractive Index (20°C)	1.485 - 1.495

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