Description

Methylstyrene CAS NO 25013-15-4 is a versatile vinyl aromatic monomer, specifically a mixture of meta- and para-isomers, valued for its ability to enhance polymer properties. It is a key intermediate in the production of specialty polymers, resins, and copolymers, offering improved thermal stability, chemical resistance, and processing characteristics. This product is essential for manufacturers in the polymer, coatings, and advanced materials sectors seeking to develop high-performance formulations.

Application

• Polymer Modification: Used as a comonomer in the production of styrenic copolymers to improve heat resistance and mechanical strength.
• Specialty Resins: A critical raw material for manufacturing unsaturated polyester resins (UPR) and alkyd resins for high-performance coatings and composites.
• Adhesives & Sealants: Imparts enhanced durability and adhesion properties in pressure-sensitive and structural adhesive formulations.
• Elastomers & Rubbers: Serves as a modifier in SBR (Styrene-Butadiene Rubber) and other synthetic rubbers to tailor flexibility and aging resistance.
• Chemical Synthesis: Acts as a precursor in organic synthesis for producing fine chemicals, pharmaceuticals, and agrochemical intermediates.
• Oilfield Chemicals: Employed in the synthesis of polymers used as viscosity modifiers and fluid loss additives in drilling fluids.

Basic Information

Product Name	Methylstyrene
CAS No.	25013-15-4
Molecular Formula	C9H10
Molecular Weight	118.18 g/mol
Synonyms	Vinyltoluene; Methylstyrol; m/p-Vinyltoluene; Toluene, vinyl-; (3-Methylphenyl)ethene; (4-Methylphenyl)ethene; α-Methylstyrene (isomer specific); PMS (Para-Methylstyrene)
EINECS	246-562-2

Quality Control

Our Methylstyrene is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including gas chromatography (GC), to ensure it meets precise purity and composition specifications. A Certificate of Analysis (COA) detailing assay, isomer ratio, and impurity profiles is provided with each shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials such as strong acids and oxidizing agents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep container tightly sealed when not in use to prevent evaporation and maintain product integrity.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 99.0%
Isomer Ratio (m/p)	60/40 typical (customizable)
Color (APHA)	≤ 30
Water Content (KF)	≤ 0.05%
Inhibitor (TBC)	10-50 ppm (as specified)

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