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Chemical Name: 3-Methylheptane
Chemical Family: Aliphatic hydrocarbons
Synonyms: No widely used common synonyms, often referenced by its IUPAC name
Molecular Formula: C8H18
Appearance: Clear, colorless liquid with a typical gasoline-like odor
CAS Number: 589-81-1
Physical Hazards: Flammable, catches fire easily if there are open flames, sparks, or even hot surfaces around
Health Hazards: Breathing in vapors leads to dizziness or headache, and being in direct skin contact causes irritation
Environmental Hazards: Harmful to aquatic life if spilled, especially when large quantities reach natural water sources
Signal Words: Warning signs include flammability and risk of causing drowsiness or discomfort—even brief exposure matters
Component: 3-Methylheptane
Concentration: Pure substance or high-percentage mixture in hydrocarbon blends
Other Constituents: Impurities usually negligible, though commercial grades sometimes carry minor related alkanes
Inhalation: Take anyone affected straight to an area with fresh air; drowsiness or dizziness can creep up unexpectedly
Skin Contact: Wash exposed skin with soap and water immediately; prolonged skin contact causes dryness or irritation
Eye Contact: Rinse eyes carefully with clean water—hold eyelids open long enough to flush out all residue
Ingestion: Swallowing even a small amount calls for urgent medical advice—not every effect is visible right away
Suitable Extinguishing Media: Use foam, dry chemical, or carbon dioxide; never count on just water, as it spreads the liquid
Specific Hazards: Vapors become flammable at room temperature, so burning 3-Methylheptane creates dense fumes that might contain toxic decomposition products
Protective Equipment: Firefighters rely on full protective gear and self-contained breathing apparatus in these fires
Personal Precautions: Remove all ignition sources, ventilate the area, and keep people at a safe distance
Containment: Small spills mop up with sand or soil; for larger leaks, build dikes to block entry into drains and water
Cleanup Methods: Shovel absorbed material into sealable containers for proper treatment—never just wash it away
Handling: Only open containers in well-ventilated, spark-free places—plastic containers sometimes generate static, which turns risky
Storage Conditions: Store in tightly sealed drums or tanks away from heat, sunlight, and incompatible chemicals; always label storage areas clearly
Special Considerations: Static electricity builds up fast during pumping or pouring, so always ground the equipment and containers
Engineering Controls: Use local exhaust ventilation to remove vapors at their source; indoor work spaces should have working air exchange systems
Personal Protective Equipment: Wear nitrile gloves, safety goggles, and flame-resistant clothing; if vapor levels climb, rely on appropriate respiratory protection
Exposure Guidelines: Limits differ by country and region but always keep airborne concentrations below threshold values for hydrocarbons
Boiling Point: Roughly 118–122°C for 3-Methylheptane
Melting Point: Found below −100°C
Flash Point: Estimate ranges near 25°C, putting it in the hazard zone for common flammable liquids
Vapor Pressure: Moderate, leading to significant evaporation at room temperature
Solubility: Insoluble in water, mixes well with other hydrocarbons
Odor: Distinct, reminiscent of petroleum products, detected at low concentrations
Chemical Stability: Stable under normal conditions; left uncapped or heated, it degrades much faster
Reactivity: Can react violently with strong oxidizers
Hazardous Decomposition: Breaks down into carbon monoxide, carbon dioxide, and unidentified hydrocarbons in a fire
Routes of Exposure: Inhalation, skin absorption, accidental ingestion
Short-term Effects: Headaches, nausea, fatigue, dizziness after breathing high concentrations; direct skin exposure sometimes produces mild dermatitis
Chronic Effects: Prolonged handling carries potential for liver or kidney strain, though reports mostly focus on hydrocarbons as a class rather than this specific compound
Carcinogenicity: No direct evidence ties 3-Methylheptane to cancer, but caution carries over from broader hydrocarbon solvent risks
Aquatic Toxicity: Threatens aquatic environments even when spilled in small amounts, as oily layers block oxygen transfer
Persistence and Degradability: Begins breaking down slowly in soil or open air, yet most persists in water, sticking to solids
Bioaccumulation: Likely at higher trophic levels, though specific data for 3-Methylheptane is rare; similar alkanes do accumulate in aquatic organisms to some extent
Recommended Disposal: Collect waste in properly labeled hazardous-waste drums—never pour down land drains or into soil
Recovery Options: Professional recycling facilities sometimes accept hydrocarbon liquids; incineration remains the fallback in controlled conditions
Regulatory Requirements: Treat spent or unused 3-Methylheptane as hazardous waste according to regional laws
UN Number: Classified with similar hydrocarbons under UN 3295
Hazard Class: Flammable liquid, with shipping bans on personal vehicles or passenger aircraft
Packaging: Leak-proof, correctly labeled containers with proper hazard markings throughout the supply chain
Chemical Inventory Status: Listed on national and international chemical inventories including the US TSCA and the EU’s REACH system
Safety Regulation: Falls under OSHA, EPA, and global equivalents for workplace and environmental safety
Labeling: Includes flammable warnings, and advisories for proper ventilation and restricted use around food and open flames
