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Name: Squalene
Chemical formula: C30H50
Common uses: Emollient in skincare, vaccine adjuvant, dietary supplement, and ingredient in food products.
CAS number: 111-02-4
Form: Colorless to pale yellow liquid with a slight odor that gets overlooked in formulations.
Classification: Not classified as dangerous under standard OSHA or GHS guidelines.
Main concerns: Eyes and skin may sting if exposed in raw form, but no long-term damage gets reported in regular occupational settings.
Fire hazard: Burns like most oils, and when exposed to flame, can produce typical hydrocarbon smoke and some unpleasant fumes.
Environmental impact: Not a major threat to land or aquatic life in standard amounts.
Target organs: None identified under typical exposure; inhalation not linked to toxicity.
Chemical name: Squalene
Purity: Often found at 98% or higher for commercial and lab-grade stocks.
Byproducts or Additives: Experienced lab workers recognize the occasional trace of related hydrocarbons, but these are minimal after refining.
Natural sources: Harvested commonly from olive oil, amaranth seed, and shark liver for food and pharmaceuticals.
Synonyms: 2,6,10,15,19,23-Hexamethyltetracosa-2,6,10,14,18,22-hexaene
Inhalation: No known problem, though moving to fresh air gets recommended if one experiences discomfort near fumes during a spill or fire.
Skin contact: Wipe off and wash well with soap and water. Rare for serious irritation to develop, but repeated, concentrated exposure dries out skin.
Eye contact: Flush eyes with water for many minutes, and keep the lids open if stinging persists.
Ingestion: Swallowing small amounts isn't a problem, and squalene is consumed in certain foods. Large accidental gulps might upset the stomach, so medical advice helps if discomfort lasts.
Long-term issues: Regular workplace exposure rarely causes chronic symptoms for workers in cosmetics, food, and pharmaceutical labs.
Suitable extinguishing media: Standard foam, dry chemical, or CO2 stops small oil fires.
Special hazards: Burning gives off carbon monoxide, carbon dioxide, and sometimes smelly organic smoke.
Protective equipment: Firefighters should wear self-contained breathing gear and gloves, as smoke can coat the skin uncomfortably.
Advice for firefighters: Stay away from direct plume; squalene-rich smog lingers if combustion hits drums or bulk stores.
Flash point: Above most room temperatures, with records settling around 210°C. That means it won’t flare up without an actual fire.
Personal precautions: Avoid slipping if squalene leaks on smooth floors, since it forms a slick layer quickly.
Cleanup methods: Wipe and mop with absorbent cloths, then use a detergent-based wash for greasy residues.
Protective gear: Gloves matter for heavy cleanup, especially if your skin is prone to dryness or eczema flareups.
Environmental precautions: Prevent entry into drains; even though squalene itself isn’t toxic, clogging is a nuisance and treatment plants aren’t set up to deal with oil loads.
Ventilation: Open windows or work in areas with extraction if large amounts have evaporated or spilled.
Storage temperature: Normal room conditions work well, provided bottles stay tightly capped and away from flame or heater elements.
Containers: Glass or high-grade plastic stands up to squalene, since metal drums have trouble with long-term exposure to unsaturated oils.
Handling tips: Pouring with care avoids slick spots. Spills left unaddressed attract dust and go rancid, so wiping up is a daily best practice.
Other precautions: Squalene breaks down slowly in sunlight, so storage in a dark place keeps it fresher.
Compatibility: Low reaction risk with other common lab and cosmetic ingredients, but don’t mix with acids or strong oxidizers unless trained for specific processes.
General ventilation: Good airflow reduces the chance of vapor build-up, especially in labs processing large volumes.
Personal protective equipment: Gloves help limit dryness during regular handling; goggles stop accidental eye splashes.
Respiratory protection: For regular work, wearing a mask isn’t needed. Masking only comes up during fire cleanup or if bulk vapors make breathing hard.
Limit values: Regulatory agencies in North America and Europe haven’t set strict exposure limits, reflecting squalene’s low acute toxicity.
Appearance: Clear to slightly yellow oily liquid with a faint, benign smell.
Boiling point: Around 285–290°C, much higher than water.
Melting point: Below zero, so even in cold rooms the bottles pour fine.
Solubility: Insoluble in water, mixes easily with other dietary oils and solvents like ether.
Viscosity: Free-flowing but leaves an oily film on skin and glassware.
Density: About 0.86 g/cm³, lighter than water.
Vapor pressure: Low, rarely an inhalation concern at room temperature.
Stability: Holds up under standard storage conditions and daily use.
Incompatibility: Strong oxidizers speed up squalene’s breakdown and produce sticky byproducts that gum up bottles.
Conditions to avoid: Excessive heat or direct sunlight for months at a time eventually spoils quality.
Hazardous byproducts: Burning or extreme heating creates typical hydrocarbon fumes, alongside some aldehydes.
Polymerization: Does not spontaneously polymerize during handling, one less thing for manufacturers to worry over.
Acute toxicity: Food and medical records show squalene is tolerated by the body, but big intake through unrefined supplements can upset digestion.
Chronic effects: People working with this oil every day show no notable chronic symptoms in health studies.
Eyes and skin: Some people get mild redness from repeated direct skin exposure; most see no effect.
Allergenic potential: Hypoallergenic for almost all users; allergy reports are rare.
Inhalation: As a non-volatile oil, squalene fumes only cause concern in large industrial fires, where smoke and reaction products trigger symptoms seen with any burning oil rather than squalene itself.
Aquatic toxicity: Squalene does not poison fish or aquatic insects in the concentrations seen during typical accidental releases.
Degradability: Microbes break it down steadily in soil or water, and it does not persist for years.
Bioaccumulation: Not a threat—doesn’t build up in the fat or muscles of wildlife the way some persistent chemicals do.
Mobility: Stays put in soil unless washed away with soaps or detergents.
Additional notes: Large-scale release can clog filters in municipal water treatment, interrupting oxygen transfer and processing.
Waste management: Small lab or household users pour leftover squalene onto absorbent material and place it in the trash, following any local rules.
Larger quantities: Oil collection bins and licensed waste contractors handle containers contaminated with residue.
Incineration: Commercial incinerators handle oily wastes safely—open burning releases clouds of unpleasant hydrocarbons.
Sewer disposal: Sending it down the drain clogs pipes and slow drains, so disposal in municipal waste makes most sense.
Shipping: Moves without special restrictions by road, rail, or air in properly capped containers.
Hazard classification: Does not carry a dangerous goods shipping number in most jurisdictions.
Packing considerations: Bottles and drums need tight seals to prevent leaking, just as with cooking oils.
Spill risk: High-volume shipments should use packing materials to absorb oil in the event of a break during transit.
Labeling: Not required to bear special hazard or toxicity warnings in the United States, Canada, or Europe.
Food and drug uses: Permitted as an ingredient in many regions, so long as purity remains high and source is safe.
Worker protections: Standard chemical safety training suffices in most countries, matching the low risk posed by squalene in manufacturing.
Environmental regulations: No restrictions on small or accidental releases, but bulk handlers follow oil spill prevention plans common to all vegetable and animal oils.
Registration: No need for licensing in labs or factories beyond those covering ordinary consumer-grade oils.
