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Name: N-Hexyl Formate
Chemical Formula: C7H14O2
Synonyms: Formic acid hexyl ester
Physical appearance: Clear, colorless liquid with a fruity scent
Relevant use: Mainly used in flavors, fragrances, and sometimes as a solvent in laboratory settings. People running smaller labs or manufacturing setups have probably noticed it on supply orders, especially if working with fragrance formulations or specialty solvents.
Hazard statements: Highly flammable liquid and vapor. Skin and eye irritant. Harmful if swallowed or inhaled. Contact can trigger headaches, dizziness, and respiratory irritation.
Routes of exposure: Inhalation pretty common in lab settings. Skin absorption comes up if gloves aren’t worn. Accidental splashes in the eye sting severely.
Risk symbols: Flame, exclamation mark. Definitely not something to keep open near a heat source.
Main component: N-Hexyl Formate (typically over 98%).
Potential impurities: Lower esters, formic acid, water (in very small amounts). People in the lab sometimes ignore trace impurities, though these might spike irritation risk, especially with repeated contact.
Eye contact: Flush eyes for several minutes with plenty of clean water. Ironically, eyewash stations in smaller facilities often go unchecked, which is a shame because a fast rinse really reduces long-term harm.
Skin contact: Wash with soap and water right away. Remove clothing soaked with it. Quick action matters—a slow rinse often leads to local redness and burning.
Inhalation: Move into fresh air, loosen tight clothing. Don’t tough it out. Quick response helps, most people get over mild symptoms, but asthma or lung irritation can linger.
Ingestion: Rinse mouth with water, do not induce vomiting. Seek medical help. A doctor’s visit is critical because chemical pneumonia is a real risk.
Suitable extinguishing media: Use dry chemical, CO2, or foam. Water jet shouldn’t get used, as it spreads the liquid.
Typical fire hazards: Gives off toxic fumes—carbon monoxide and carbon dioxide—so proper ventilation keeps you safer.
Protective gear: Full protective suit, gloves, and breathing apparatus. Many small teams skip the full gear at their own peril.
Special notes: Keep containers cool with water spray if nearby fire. Vapors can ignite far from the source.
Personal precautions: Evacuate unnecessary people. Use gloves, splash-proof goggles, and chemical-resistant boots. Ventilate the area well.
Spill containment: Confine spill with sand or inert absorbent. Don’t let liquid into drains, as runoff harms aquatic systems.
Clean up: Shovel absorbed material into a clean, dry container for disposal. Routine checks and a spill kit on hand mean cleanup happens faster and safer.
Safe handling: Wear proper gear—nitrile gloves, safety goggles. Handle under a fume hood or with good ventilation. People sometimes get complacent and let open bottles linger, raising risk.
Storage tips: Store in a tightly closed, labeled container. Keep away from heat, sparks, and sunlight.
Incompatible substances: Strong oxidizing agents, acids, or bases. It often surprises beginners how quickly formate esters react with everyday lab chemicals.
Engineering controls: Use of fume hoods or local exhaust keeps exposure low. Good lab infrastructure matters as a weak point on ventilation often goes unnoticed until symptoms appear.
Personal protection: Nitrile gloves, chemical splash goggles, lab coats. In high concentrations, a respirator should be packed in. Skip open-toed shoes—closed shoes with chemical resistance work best.
Hygiene: Wash hands before breaks and at shift end. No food or drink in the lab. Eating near the compound always leads to trouble sooner or later.
Appearance: Clear to slightly yellowish liquid.
Odor: Fruity, pleasant but strong.
Boiling point: Around 158-160°C. Spills evaporate slower than acetone, so odors linger.
Melting point: Below 0°C.
Flash point: Quite low, roughly 47°C. Flammable vapor risk is real.
Solubility: Moderately soluble in organic solvents, not much in water.
Density: About 0.87 g/cm³. Thinner than water, floats on top during runoff.
Vapor pressure: Noticeable at room temp, especially if left uncapped.
Chemical stability: Stable under recommended storage. Degrades with strong acids and bases.
Reactivity: Reacts with oxidizing agents. Heat and sunlight hasten breakdown.
Hazardous decomposition: Yields carbon oxides and sometimes other toxic fumes on burning or strong reactions.
Real experience: Some users report surprising bottle bulging in old stocks, usually from minor decomposition or gas buildup.
Acute toxicity: Moderate. Large doses by ingestion cause nausea, vomiting, central nervous system depression.
Skin contact: Prolonged or repeated exposure dries out skin, cracking, and contact dermatitis. Nitrile gloves hold up better than latex.
Eye contact: Painful, causes redness and watering.
Inhalation risks: Dizziness, headaches, respiratory discomfort common at higher vapor concentrations. Ventilation curtails these effects for most lab personnel.
Chronic exposure: Over time, repeated skin exposure raises the risk for sensitization.
Aquatic risks: Toxic to aquatic life. Effluent from spills or cleaning runs off into storm drains, impacting local water sources. Users at riverside labs see impacts on fish when proper containment gets skipped.
Degradation: Breaks down over time, but slow in colder or acidic soils.
Bioaccumulation: Not considered likely, but aquatic organisms absorb it easily.
Other impacts: Extended spills harm local vegetation.
Disposal method: Incineration at an approved facility works best. Most facilities refuse it in standard trash due to flammability.
Contaminated packaging: Triple rinse then send for hazardous waste treatment. Skipping this step risks injury to workers down the chain.
Practices from experience: Grouping all solvent waste together looks easy but invites accidents. Segregate esters—safer for everyone.
UN number: UN1188
Proper shipping name: Hexyl Formate
Hazard class: 3 (flammable liquid)
Packing group: III
Handling advice: Use metal or chemically compatible drums with proper labels. Keep trucks cool—one local incident with a hot container led to a minor vapor fire and lots of lost time.
Hazard Communication: Subject to labeling as a flammable irritant under workplace safety rules.
Restrictions: Certain national and local governments set release limits based on toxicity and flammability.
Workplace safety: Exposure limits haven’t been widely established, though good safety practice limits it as if it carries moderate risk.
Community advice: Training workers about symptoms and safe handling lowers accidents dramatically. Regular drills and refresher sessions work better than handing out another stack of paperwork.
