Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
1-METHYL-1-CYCLOHEXENE (CAS: 591-49-1), also known as α-methylcyclohexene, is a colorless, flammable cyclic olefin. It is a versatile organic intermediate widely used as a solvent, monomer precursor for polymer modification, and research reagent for studying alkene stereochemistry.
Molecular Formula & Structure
Molecular Formula: C?H??; Molecular Weight: Approximately 96.17
Physical Properties
- Appearance: Colorless liquid
- Melting Point: Approximately -120.4 °C; Boiling Point: Approximately 110–111 °C (lit.)
- Density: Approximately 0.811 g/cm3 (20 °C, lit.); Refractive index: 1.45 (20 °C)
- Solubility: Miscible with ethanol, ether and hydrocarbons; slightly soluble in water (52 mg/kg at 25 °C)
- Stability: Stable under normal conditions; may polymerize; highly flammable, flash point -4 °C (closed cup)
Chemical Properties
- CAS Number: 591-49-1; EINECS Number: 209-718-0; Chemical Type: Cyclic olefin, organic intermediate
- Chemical Characteristics: Contains a cyclohexene ring with a methyl substituent on the double bond; undergoes electrophilic addition reactions following Markovnikov's rule.
- Applications: Solvent; organic synthesis intermediate; research reagent for studying alkene reactions and secondary organic aerosol yields.
- Toxicity: Irritating to eyes, respiratory tract and skin; oral toxic, may damage lungs; harmful to the environment.
Synthesis Method
- Raw Materials: 1-methylcyclohexanol (main raw material), sulfuric acid/phosphoric acid (catalyst); or 1-methylcyclohexyl bromide and sodium ethoxide.
- Synthesis Route: Mainly via acid-catalyzed dehydration of 1-methylcyclohexanol (E1 elimination) or base-induced dehydrohalogenation of 1-methylcyclohexyl bromide (E2 elimination).
Storage & Safety
- Storage: Sealed, stored at room temperature in a cool, dry place; avoid sunlight, high temperature and moisture; stabilize with 10 ppm hydroquinone if needed.
- Safety: Wear protective equipment; avoid contact and ingestion; keep away from fire sources and oxidants.
- Hazard: Highly flammable liquid; decomposes when heated; may cause environmental pollution if leaked.
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