Understanding the Risks and Precautions for Perfluorooctyltriethoxysilane

Identification

Chemical name: Perfluorooctyltriethoxysilane
Appearance: Typically colorless to pale yellow liquid
Odor: Faintly musty or organic
Common uses: Repellent surface treatments, coatings, primers in electronics and fabrics, glass protection.

Hazard Identification

Health risks: Eye and skin irritation with possible redness or dryness during direct contact. Prolonged inhalation brings headaches, dizziness, and lightheadedness.
Environmental hazard: Persistent, bioaccumulative, and toxic to aquatic life due to fluorinated chain structure.
Flammability: Combustible; releases irritating or toxic fumes when decomposed by fire.
Chronic exposure: Insufficient long-term data, but fluorinated solvents are linked to damage in certain organs with repeated exposure.

Composition / Information on Ingredients

Main constituents: Perfluorooctyltriethoxysilane forms the bulk of the mixture.
Impurities: Byproducts from synthesis, unreacted silanes, or residual solvents may linger in small amounts.
CAS number: 51851-37-7

First Aid Measures

Eye contact: Flush immediately with gentle, steady water for about 15 minutes. Remove contacts if present.
Skin contact: Wash with soap and water thoroughly. Remove contaminated clothing.
Inhalation: Get to fresh air; monitor for headache or drowsiness.
Ingestion: Rinse mouth and seek medical advice. Avoid inducing vomiting except by doctor’s recommendation.

Fire-Fighting Measures

Suitable extinguishing agents: Foam, dry chemical, carbon dioxide. Do not use water jets at close range.
Special risks: In combustion, hydrogen fluoride and silicon oxides may form. Toxic vapors can spread.
Protection for firefighters: Use full protective gear and self-contained breathing apparatus.

Accidental Release Measures

Spill control: Isolate area and ventilate. Avoid breathing vapors.
Cleaning method: Absorb with inert material such as sand. Scoop residue into a chemical waste container.
Precautions: Prevent runoff entering waterways. Wear gloves, protective goggles, and chemical splash suit.

Handling and Storage

Handling tips: Keep containers tightly closed. Work in a well-ventilated area.
Storage conditions: Store in a cool, dry, and well-ventilated spot. Shield from sources of ignition and strong acids or bases.
Hygiene: Wash hands after use. Do not eat or smoke near work area.

Exposure Controls and Personal Protection

Engineering controls: Use local exhaust. Maintain good workplace air quality.
Respiratory protection: Wear approved organic vapor respirators if ventilation is lacking.
Eye protection: Use chemical splash goggles.
Glove material: Nitrile or neoprene recommended.
Clothing: Wear chemical-resistant outerwear for extended contact.

Physical and Chemical Properties

Physical state: Liquid
Color: Colorless to pale yellow
Boiling point: Over 150°C
Vapor pressure: Low at room temperature
Solubility: Not readily soluble in water
Density: Approx. 1.4-1.5 g/cm³
Odor threshold: No reliable data available

Stability and Reactivity

Chemical stability: Usually stable when stored correctly
Hazardous reactions: Strong oxidizers, acids, or alkalines may trigger decomposition
Decomposition products: Hydrogen fluoride, silicon dioxide, and perfluorinated byproducts on burning

Toxicological Information

Acute effects: Skin and eye irritation
Inhalation: Upper respiratory tract irritation, headache, fatigue
Long-term risk: Accumulation in the body with frequent exposure has not been fully studied, but structural relatives can impact the liver or kidneys
Carcinogenicity: Data on this specific compound is limited; perfluorinated chemicals in general have drawn regulatory scrutiny

Ecological Information

Persistence: Slow breakdown in natural environments due to strong fluorinated bond
Bioaccumulation: Tends to build up in aquatic food chains
Aquatic toxicity: Toxic to fish, invertebrates, and algae
Mobility: Low, but persistent in sediments and water

Disposal Considerations

Recommended method: Incinerate at high temperature in a licensed chemical disposal facility
Avoid: Pouring down the drain, landfill burial without treatment, or releasing into natural water systems
Container disposal: Rinse thoroughly and send to hazardous waste collector

Transport Information

UN classification: Not universally regulated, but may require labeling for hazardous chemicals in some countries
Packing group: Subject to local and international guidelines due to potential environmental hazard
Special precautions: Protect against physical damage; transport upright and avoid contact with oxidizers

Regulatory Information

Global regulations: Environmental Protection Agencies in multiple regions monitor and restrict perfluoroalkyl substances
Restrictions: Inclusion in lists of substances of very high concern or candidate lists within government chemical frameworks
Labeling requirements: Hazard warning for skin, eye irritation, and possible aquatic harm