Name: Methylcyclohexenone Chemical Formula: C7H12O CAS Number: 1120-73-6 Relevant Uses: Mainly used in chemical research, organic synthesis, fragrance manufacture Manufacturer Information: Contact details typically available on supplier documentation Emergency Contact: Provided by chemical supplier or workplace safety officer Synonyms: 3-Methylcyclohex-2-en-1-one, m-Cyclohexenone
Classification: Flammable liquid, Acute toxicity (inhalation, skin), Eye and skin irritant Signal Word: Warning Hazard Statements: Causes skin and eye irritation, May be harmful if inhaled, Causes respiratory tract irritation, May form explosive mixtures with air Pictograms: Flame, Exclamation mark Precautionary Statements: Avoid contact with eyes and skin, Avoid inhalation of vapors, Use with adequate ventilation Label Elements: Conform to GHS (Globally Harmonized System) Potential Health Effects: Headache, nausea, dizziness from inhalation; irritation on direct contact
Chemical Identity: Methylcyclohexenone Purity: Generally above 97% in pure forms Impurities: Trace solvents, byproducts from synthesis CAS Number: 1120-73-6 Concentration: Often supplied as neat liquid or solution in suitable carrier Additives: Without stabilizing agents unless specified
Inhalation: Move affected person to fresh air, Keep at rest, If breathing is difficult seek medical attention Skin Contact: Immediately wash with soap and water, Remove contaminated clothing, Get medical advice for persistent irritation Eye Contact: Flush with water for at least 15 minutes holding eyelids apart, Seek medical attention if irritation persists Ingestion: Rinse mouth, Do not induce vomiting unless instructed by a doctor, Obtain medical help right away Advice to Physician: Treat symptoms, Maintain respiratory and circulatory support if needed
Suitable Extinguishing Media: CO2, dry chemical powder, foam, water spray Hazards from Combustion: Produces carbon monoxide, carbon dioxide, potentially toxic fumes Special Protective Equipment: Full protective gear and self-contained breathing apparatus for firefighters Firefighting Instructions: Keep containers cool with water spray, Prevent runoff from entering drains Flammability: Liquid and vapors ignite easily, Vapors may travel long distances to source of ignition
Personal Precautions: Evacuate area, Ventilate, Wear protective gloves, goggles, and clothing Environmental Precautions: Prevent from entering water bodies, soil, and drains Spill Clean-Up Methods: Absorb with inert materials (sand, earth), Place in suitable sealed containers for disposal, Clean area with detergent after material is collected Reporting Requirements: Notify local authorities if large spills threaten the environment
Handling: Avoid inhaling fumes, Prevent contact with skin and eyes, Use spark-proof tools and explosion-proof equipment Storage Conditions: Store in tightly closed original container, Keep in a cool, well-ventilated area, Eliminate ignition sources Incompatibilities: Oxidizing agents, Strong acids, Strong alkalis Storage Life: Shelf stable under recommended conditions, Monitor for any signs of instability
Exposure Limits: No occupational exposure limits set for Methylcyclohexenone, Minimize airborne concentrations as much as practicable Engineered Controls: Local exhaust ventilation, Closed systems where possible Personal Protection: Chemical-resistant gloves (nitrile, neoprene), Splash goggles, Lab coat or protective clothing Respiratory Protection: Organic vapor approved respirator for high concentration scenarios or spills Hygiene Measures: Wash hands thoroughly after handling, Remove contaminated clothing at once
Appearance: Colorless to pale yellow liquid Odor: Sweet, slightly minty characteristic scent Boiling Point: Around 155-161°C Melting Point: -30°C Flash Point: Approximately 49°C (closed cup) Vapor Pressure: 3.5 mmHg at 25°C Solubility: Moderate in water, Readily mixes with organic solvents Density: 0.92–0.95 g/cm³ at 20°C pH: Not applicable (organic liquid) Partition Coefficient (log Kow): Estimated 1.3–1.7
Chemical Stability: Stable under recommended storage, Can become unstable at elevated temperature or exposure to air Conditions to Avoid: Excessive heat, Sparks, Flames, Strong oxidizers Materials to Avoid: Acids, Bases, Oxidizing and reducing agents Hazardous Decomposition Products: Carbon oxides, Possible low molecular weight hydrocarbons Reactivity: May react with incompatible materials resulting in product degradation
Acute Toxicity: Oral LD50 (rat) estimated 500–1200 mg/kg Inhalation: May cause respiratory tract irritation, Dizziness, Headache Skin: Irritating on contact, Prolonged exposure may cause dermatitis Eyes: Irritating, Redness and watering expected Chronic Effects: Repeated exposure may lead to skin sensitization, Prolonged inhalation causes nose and throat effects Carcinogenicity: No classification under IARC, NTP, OSHA Mutagenicity / Teratogenicity: No significant data found Sensitization: Rare, but possible with high exposure
Ecotoxicity: Harmful to aquatic organisms with immediate or long-term effects Persistence and Degradability: Moderately biodegradable in soil and water Bioaccumulation Potential: Low to moderate based on partition coefficient Mobility in Soil: Moderate, Potential to leach into groundwater Other Effects: Avoid uncontrolled release to the environment
Waste Disposal: Dispose as hazardous waste conforming to local, state, and federal regulations Container Disposal: Empty containers should be tripled rinsed and offered for recycling, If not possible, dispose as hazardous waste Precautions: Prevent release to water bodies and soil, Use certified chemical disposal services
UN Number: 1993 Transport Hazard Class: 3 (Flammable Liquid) Packing Group: III Proper Shipping Name: Flammable liquid, n.o.s. (includes methylcyclohexenone) Labels: Flammable liquid Special Precautions: Keep away from heat, sparks, No smoking during transport
TSCA Inventory: Listed REACH Status (EU): May require registration depending on annual import volume GHS Compliance: Labels consistent with OSHA Hazard Communication Standard WHMIS (Canada): Classification: Flammable liquid, Irritant SARA Title III: Not listed under Extremely Hazardous Substances Other Relevant Regulations: Follow all applicable national and local regulations regarding transport, storage, usage, and disposal
