Perfluorodecalin: A Clear Look at What Matters for Safety and Use

Identification

Substance Name: Perfluorodecalin
Chemical Formula: C₁₀F₁₈
Other Names: Perfluorodecahydronaphthalene
CAS Number: 306-94-5
Appearance: Transparent, colorless liquid with a faint odor
Common Use: Used in medicine as a carrier for oxygen, biological research, ophthalmology, and in some cosmetic or skin-care applications due to its unique gas-dissolving properties

Hazard Identification

GHS Classification: Not classified as hazardous according to most globally recognized chemical safety standards
Key Hazards: Material shows low toxicity for skin and eyes, but inhaling vapors or handling in poorly ventilated areas can cause mild irritation, especially for sensitive individuals or with prolonged exposure
Environmental Risks: Persistent in nature, resisting breakdown in water and soil environments
Fire and Explosion: Material typically does not burn, but high heat can produce toxic fumes such as hydrogen fluoride or carbonyl fluoride if decomposition occurs
Emergency Risks: Spillage could create slip hazards on hard surfaces due to its slick, oily texture

Composition / Information on Ingredients

Main Ingredient: Perfluorodecalin, typically >99% purity in medical or laboratory usage
Impurities: Trace residuals from manufacturing, but reputable sources purify it for specialty uses
Additives: Not generally present in unblended product; additives might appear in mixtures or end-use formulations depending on the application

First Aid Measures

Inhalation: Move to fresh air if breathing becomes uncomfortable; seek medical attention for persistent symptoms
Skin Contact: Wash with warm water and soap; not known to cause lasting effects for most people
Eye Contact: Rinse with water for several minutes; remove contact lenses if present and easy to do
Ingestion: Rinse mouth; medical attention unlikely to be needed due to low acute toxicity, but vulnerable individuals should seek advice
Note: The likelihood of requiring aggressive medical intervention stays very low unless there’s repeated or intentional exposure

Fire-Fighting Measures

Flammability: Not a flammable substance under normal atmospheric conditions
Combustion Products: At very high temperatures, can produce hydrogen fluoride and carbonyl fluoride – both toxic gases needing specialized protection
Suitable Extinguishing Media: Use water spray, carbon dioxide, dry powder, or foam depending on what’s burning nearby, not for the liquid itself
Special Protective Equipment: Standard firefighting gear with respiratory protection for possible toxic off-gassing above 300°C
Firefighting Challenges: Slick surfaces can lead to slips in emergency response, so feet need careful placement

Accidental Release Measures

Personal Precautions: Avoid contact with skin and eyes if possible, ventilate space to avoid vapor buildup
Spill Response: Absorb with sand, soil, or commercial absorbents; collect and dispose according to local regulations
Environmental Protection: Prevent entry into waterways or drains—persistent chemicals can travel and survive for decades
Cleanup Methods: Wipe hard surfaces thoroughly to avoid slippery conditions; do not wash into sewage or municipal waste systems

Handling and Storage

Safe Handling: Work in well-ventilated areas, store in sealed containers out of direct sunlight and away from heat sources
Storage Temperature: Keep at room temperature; material does not require refrigeration under normal institutional storage
Material Compatibility: Store away from strong acids, bases, and open flame despite low flammability
Container Recommendation: Use glass or fluoropolymer-lined vessels to avoid any potential reaction or leaching

Exposure Controls and Personal Protection

Occupational Limits: No explicit workplace exposure limit set in most countries due to low measured toxicity
Engineering Controls: Adequate ventilation, closed systems, and fume hoods recommended for bulk handling
Personal Protective Equipment: Gloves and eye protection suggested in laboratory settings; routine handling usually calls for minimal PPE
Respiratory Protection: Only required if mist or vapor forms; use of respirator in high-concentration areas recommended for added peace of mind
Hygiene: Wash hands after use, avoid eating or drinking near the workspace

Physical and Chemical Properties

Physical State: Liquid at room temperature
Melting Point: Ranges around -3°C
Boiling Point: Ranges near 142°C
Density: About 1.92 g/cm³
Solubility in Water: Almost negligible
Vapor Pressure: Very low under ambient conditions
Odor: Practically odorless
Viscosity: Somewhat higher than water
Other Traits: Does not react with most common solvents, dissolves gases like oxygen and carbon dioxide efficiently

Stability and Reactivity

Chemical Stability: Very stable under normal conditions; does not degrade easily
Reactive Hazards: Only reactive under extreme heat or with certain highly reactive chemicals such as sodium or molten alkali metals
Decomposition: Prolonged heating above 300°C leads to hazardous decomposition products, including fluorinated gases
Corrosivity: Not corrosive to standard laboratory or storage materials

Toxicological Information

Acute Toxicity: Studies in animals and real-world experience show minimal acute toxicity by oral, dermal, or inhalation routes
Chronic Exposure: No evidence suggests cumulative toxicity or carcinogenicity from proper use
Skin and Eye Contact: May cause mild, temporary irritation—usually only after prolonged or repeated exposure
Inhalation: High concentrations of vapor might irritate airways, but standard ventilation can prevent this
Sensitization: No sensitizing effects documented in medical or occupational reports
Systemic Effects: Not known to cause organ damage or reproductive toxicity

Ecological Information

Persistence: Highly resistant to biological and chemical breakdown in soil or water
Bioaccumulation: Unlikely to build up in the tissues of living organisms due to low bioavailability
Mobility: Moves through soil and water due to low partition coefficient, but doesn’t readily bind to particles
Aquatic Toxicity: Evidence points to very low toxicity for fish, invertebrates, and other aquatic life, yet its resistance to environmental breakdown means any release sticks around for a long time
Environmental Caution: Avoid routine discharge, as even low-toxicity substances need watching when they persist

Disposal Considerations

Waste Treatment: Incineration at high temperatures safest for large quantities, following local environmental compliance
Regulatory Approach: Dispose in accordance with local or national environmental regulations—not suitable for sink or municipal landfill disposal
Reuse and Recycling: Small amounts often recycled or re-purified in research labs to cut waste
Waste Collectors: Only certified hazardous material handlers should deal with substantial volumes due to persistence in sewer and soil

Transport Information

UN Number: Not regulated for transport under major international conventions due to low hazard profile
Shipping Name: Generally shipped as a non-hazardous, non-flammable liquid
Packing Group: Not assigned
Precaution in Transit: Store upright, protect packaging from leaks, and avoid stack collapse; persistent slicks form on floors or roadways if containers leak
Labeling: No special labeling necessary apart from standard chemical identification

Regulatory Information

Global Restrictions: Few direct regulations for use, but broader fluorinated chemical rules may govern environmental discharge
Occupational Standards: No established exposure limits in most health and safety codes
Hazard Communication: OSHA and GHS labeling still recommended in workplaces for transparency
Environmental Protections: Expect local governments to monitor for persistence and discharge risks even when toxicity stays low