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Chemical Name: Methanol
Common Names: Methyl alcohol, wood alcohol, wood spirits
Chemical Formula: CH3OH
Physical State: Colorless liquid
Odor: Slightly sweet, distinctive alcoholic smell
Uses: Solvent for industrial processes, antifreeze, fuel, laboratory reagent
Primary Hazard: Highly flammable liquid and vapor
Acute Hazards: Toxic if swallowed, inhaled, or absorbed through the skin
Chronic Effects: Prolonged or repeated exposure may damage the nervous system, liver, or eyes
Notable Symptoms: Headache, nausea, dizziness, vomiting, visual disturbances, blindness in severe cases
Labeling Requirements: Flammable, toxic symbol, warning against ingestion and inhalation, and instructions for immediate medical attention if exposed
Main Component: Methanol (greater than 99% concentration in pure form)
Impurities: Trace water, possible denaturants in industrial variants
CAS Number: 67-56-1
Natural Occurrence: Produced in small amounts during natural fermentation processes
Inhalation: Move the affected individual to fresh air; seek medical help if symptoms persist
Skin Contact: Remove contaminated clothing; thoroughly wash skin with soap and water
Eye Contact: Rinse eyes gently with water for a minimum of 15 minutes; obtain medical attention
Ingestion: Never attempt to induce vomiting; contact poison control or a medical professional immediately - ingesting even small amounts can be fatal
Special Note: Ethanol serves as an antidote for methanol poisoning in medical settings, so prompt emergency action matters
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical, carbon dioxide
Hazardous Combustion Products: Carbon monoxide, formaldehyde
Fire Hazards: Vapors can travel along surfaces and ignite from distant sparks; invisible flame in daylight can make fires difficult to detect
Personal Precautions: Firefighters should use self-contained breathing apparatus to prevent inhalation of noxious fumes
Emergency Actions: Evacuate the area and use water spray for cooling containers even if the fire itself cannot be seen
Cleanup Protocol: Increase ventilation; eliminate ignition sources
Spill Containment: Dike area to contain liquid; absorb with inert material like sand or vermiculite for disposal
Personal Protection: Use chemical-resistant gloves, splash goggles, and respirators as risks dictate
Environmental Precaution: Prevent liquid from entering drains, surface water, or soil due to potential toxicity to aquatic life
Handling Practices: Transfer using grounded, non-sparking equipment; avoid open flames and sources of static discharge
Storage Conditions: Store in tightly closed containers away from heat, open flames, or strong oxidizing agents; keep containers in a cool, well-ventilated area
Personal Hygiene: Wash hands thoroughly before eating, drinking, or smoking after any potential contact
Occupational Exposure Limit: OSHA PEL for methanol is 200 ppm (parts per million) as an 8-hour time-weighted average
Engineering Controls: Local exhaust ventilation at points of vapor generation
Personal Protective Equipment: Nitrile or butyl rubber gloves, chemical splash goggles, face shield
Respiratory Protection: Approved respirators when concentrations exceed exposure limits; never use air-purifying respirators in oxygen-deficient atmospheres
Appearance: Clear, colorless liquid
Odor: Mild, characteristic
Boiling Point: Roughly 65 °C (149 °F)
Melting Point: Around -98 °C (-144 °F)
Density: About 0.79 g/cm3 at room temperature
Solubility: Miscible with water in all proportions
Vapor Pressure: Significant at room temperature, can contribute to rapid evaporation
Stability: Stable under normal conditions, forms peroxides over long periods
Incompatibilities: Strong oxidizing agents, acids, alkali metals, and certain plastics
Hazardous Decomposition: Can generate toxic gases such as carbon monoxide or formaldehyde on combustion
Polymerization: Not known to polymerize under standard storage or use conditions
Routes of Exposure: Inhalation, ingestion, skin absorption
Acute Toxicity: As little as 10 mL can cause permanent blindness; 30 mL may prove fatal if untreated
Symptoms of Poisoning: Nausea, vomiting, headache, dizziness, confusion, visual impairment progressing to blindness, coma
Long-Term Exposure: Potential for damage to liver, kidneys, optic nerves
Carcinogenicity: No confirmed links to cancer from regulatory bodies, but repeat exposures increase other health risks
Aquatic Toxicity: Harmful to fish and aquatic organisms at low concentrations
Persistence and Degradability: Methanol breaks down fairly rapidly in air and water, but the short-term risks to aquatic life remain significant
Potential for Bioaccumulation: Low; methanol does not build up in the tissues of living organisms
Soil Mobility: High mobility in soil, increasing the chance of groundwater contamination during significant spills
Waste Management: Hazardous waste usually requires disposal at licensed facilities
Small Quantities: Dilution in water not recommended due to toxicity
Regulatory Requirements: Disposal practices often fall under local, national, or international chemical waste laws
Container Disposal: Containers must be triple-rinsed and punctured before recycling or discarding to prevent unauthorized use or environmental release
Shipping Classification: Flammable liquid, typically falls within Packing Group II for transport regulations
Hazard Labels: Flammable liquid designation required on packaging
Special Dispatch Instructions: Transport vehicles need grounding and proper ventilation
Accident Prevention: Drivers and handlers trained to recognize the signs of leaks or exposure; emergency kit recommended during shipment
Workplace Control: National safety codes dictate maximum allowable concentration in air
Environmental Protection: Surface water discharge restrictions exist due to potential harm to aquatic ecosystems
Hazard Communication: Methanol must appear on chemical inventory lists; hazard information must be provided to workers and first responders
Consumer Use Limitation: Many jurisdictions restrict the sale of methanol-containing products above certain concentrations to prevent accidental or intentional poisoning
