α-Methylstyrene, 98%

About α-Methylstyrene, 98%

α-Methylstyrene is a monomer in Synthesis grade carrying the CAS registry number 98-83-9 with a typical assay of ≥98%. The compound has the formula C9H10, corresponding to a molecular weight of 118.18 g/mol. Its systematic (IUPAC) name is prop-1-en-2-ylbenzene. Alternative names: 2-Phenylpropene and Isopropenylbenzene.

In its supplied form it is a colourless to light yellow liquid. Reported physical data include a melting point of -24 °C and a density of 0.909 g/mL at 25 °C. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

It is commonly used for polymerisation, crosslinking and curing and adhesives and coatings. Buyers come mainly from polymers and plastics and paints and coatings.

Standard pack sizes are 500 mL, 5 L and 190 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Polymerisation
Crosslinking & curing
Adhesives & coatings

Industries

Specifications & identifiers

Chemical identifiers
Product name	α-Methylstyrene, 98%
Catalogue No.	VQ-019057
CAS Number	98-83-9
IUPAC name	prop-1-en-2-ylbenzene
Molecular formula	C₉H₁₀
Molecular weight	118.18 g/mol
Exact mass	118.0783
Grade	Synthesis
Purity / assay	≥98%
HSN code	29029000
InChIKey	XYLMUPLGERFSHI-UHFFFAOYSA-N
SMILES	CC(=C)C1=CC=CC=C1
PubChem CID	7407

Physical properties
Physical form	Liquid
Appearance	Colourless to light yellow liquid
Melting point	-24 °C
Density	0.909 g/mL at 25 °C
LogP (XLogP3)	3.5
H-bond donors / acceptors	0 / 0
TPSA	0 Å²
UN number	UN 2303
Synonyms	2-Phenylpropene, Isopropenylbenzene, AMS, alpha-Methylstyrene, 2-Phenyl-1-propene, 2-Phenylpropylene, Benzene, (1-methylethenyl)-, 1-Methyl-1-phenylethylene, alpha-Methylstyrol, 1-Phenyl-1-methylethylene, beta-Phenylpropylene, 1-Methyl-1-phenylethene

Safety & hazard information (GHS)

Flammable

Harmful / irritant

Environmental hazard

Signal word: Warning

Hazard statements

H226Flammable liquid and vapor
H319Causes serious eye irritation
H335May cause respiratory irritation
H411Toxic to aquatic life with long lasting effects

Precautionary statements: P210, P233, P240, P241, P242, P243, P261, P264 + P265, P271, P273, P280, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P319, P337 + P317, P370 + P378, P391, P403 + P233, P403 + P235, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of α-Methylstyrene, 98%?

The CAS Registry Number of α-Methylstyrene, 98% is 98-83-9. It is also known as 2-Phenylpropene, Isopropenylbenzene, AMS.

What is the molecular formula and molecular weight of α-Methylstyrene, 98%?

α-Methylstyrene, 98% has the molecular formula C9H10 and a molecular weight of 118.18 g/mol. Its IUPAC name is prop-1-en-2-ylbenzene.

Which grade and pack sizes of α-Methylstyrene, 98% can I order?

We supply α-Methylstyrene, 98% in Synthesis (≥98%) grade, in 500 mL, 5 L, 190 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with α-Methylstyrene, 98%?

Yes. Every lot of α-Methylstyrene, 98% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can α-Methylstyrene, 98% be shipped internationally?

Yes. α-Methylstyrene, 98% is classified as hazardous (UN 2303), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.