Description

α-Methylstyrene Dimer is a high-purity, low-color organic chemical intermediate derived from the controlled dimerization of α-methylstyrene. This compound is valued for its excellent thermal stability and low volatility, making it a superior modifier and chain transfer agent in polymer synthesis. It is essential for manufacturers in the polymer, resin, and specialty chemical industries seeking to enhance product performance and process efficiency.

Application

• As a chain transfer agent and molecular weight regulator in the production of styrenic polymers and copolymers.
• As a reactive diluent and viscosity modifier in unsaturated polyester resins and specialty coatings.
• As a key intermediate in the synthesis of high-performance plasticizers and lubricant additives.
• As a modifier to improve the thermal stability and processing characteristics of engineering plastics.
• In the formulation of adhesives and sealants to control cure rates and final material properties.
• As a comonomer in the development of specialty resins with tailored refractive index or clarity.

Basic Information

Product Name	α-Methylstyrene Dimer
CAS No.	6144-04-3
Molecular Formula	C18H20
Molecular Weight	236.35 g/mol
Synonyms	2,4-Diphenyl-4-methyl-1-pentene; α-Methylstyrene dimer; 1,1'-(1-Methyl-1,2-ethanediyl)bis[benzene]; Dimerized α-methylstyrene; AMS Dimer; 2,4-Diphenyl-4-methylpent-1-ene; Vicinal Dimer of α-Methylstyrene
EINECS	228-099-7

Quality Control

Our α-Methylstyrene Dimer is manufactured under a strict quality management system. Every batch is analyzed to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee consistency and 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. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and maintain product integrity. Recommended storage temperature is between 15°C and 25°C.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0 %
α-Methylstyrene (GC)	≤ 1.0 %
Color (APHA)	≤ 50
Water Content (KF)	≤ 0.1 %

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