Description

3-Ethylstyrene/4-Ethylstyrene CAS NO 55319-72-7 is a high-purity aromatic monomer, specifically a mixture of meta- and para-ethyl substituted styrene derivatives. This compound is valued for its role as a versatile building block in advanced polymer synthesis and specialty organic chemistry. It is essential for manufacturers and R&D facilities in the polymer, resin, and fine chemical industries seeking to modify material properties or develop novel chemical entities.

Application

• Polymer & Resin Modification: Serves as a co-monomer to enhance the thermal stability, flexibility, and solubility of polystyrene and other vinyl polymers.
• Specialty Adhesives & Coatings: Used in the formulation of high-performance adhesives, sealants, and industrial coatings requiring specific rheological and durability properties.
• Fine Chemical Synthesis: Acts as a key intermediate in the synthesis of pharmaceuticals, agrochemicals, and liquid crystal compounds.
• Advanced Material Research: Employed in R&D for developing novel copolymers, ion-exchange resins, and functionalized materials.
• Crosslinking Agent: Utilized in the production of crosslinked polymers and networks for applications requiring enhanced mechanical strength.

Basic Information

Product Name	3-Ethylstyrene/4-Ethylstyrene
CAS No.	55319-72-7
Molecular Formula	C10H12
Molecular Weight	132.20 g/mol
Synonyms	m-Ethylstyrene; p-Ethylstyrene; 1-Ethyl-3-vinylbenzene; 1-Ethyl-4-vinylbenzene; 3-Vinylethylbenzene; 4-Vinylethylbenzene; Ethylvinylbenzene mixture; EVB; m/p-Ethylstyrene isomer mixture
EINECS	Contact for details

Quality Control

Our 3-Ethylstyrene/4-Ethylstyrene is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including chromatography and spectroscopy, to ensure it meets precise purity and isomer ratio specifications. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent evaporation and potential oxidation.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0% (Total Ethylstyrene Isomers)
Isomer Ratio (3-/4-)	Typically 40-60% / 60-40%
Water Content (KF)	≤ 0.1%
Specific Gravity (20°C)	0.900 - 0.920

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