Overview
Perfluorooctylethyl Mercaptan (PFOT) is a fluorinated thiol compound characterized by its perfluorinated carbon chain and terminal thiol (-SH) group. It is primarily utilized in industrial applications requiring extreme surface repellency and durability. The compound’s unique structure enables it to form self-assembled monolayers (SAMs) on metals and other substrates, making it valuable for advanced material engineering. As a specialty chemical, PFOT is produced in limited quantities due to stringent environmental regulations on perfluorinated compounds. Industrial buyers typically source it for high-performance coatings or precision surface modifications, where alternatives are ineffective.
Physical and Chemical Properties
PFOT exhibits exceptional chemical inertness and thermal stability, attributable to its strong C-F bonds. The thiol group allows covalent bonding with metals like gold and silver, facilitating applications in nanotechnology and electronics. Its density of ~1.7 g/cm³ reflects the heavy fluorine content, while its low surface energy (<15 mN/m) enables superior water and oil repellency. The compound decomposes at temperatures above 160°C, releasing hazardous fumes including hydrogen fluoride (HF). It is incompatible with strong oxidizers and bases, requiring careful handling. Solubility tests show miscibility with common organic solvents but negligible interaction with water, aligning with its role in hydrophobic coatings.
Main Applications
PFOT is a key ingredient in anti-fouling coatings for marine equipment, where it prevents biofilm adhesion. In textiles, it imparts stain-resistant properties to high-end fabrics. The electronics industry employs PFOT for hydrophobic treatments on circuit boards and sensors, enhancing moisture resistance. Another niche application is in lithography for semiconductor manufacturing, where its SAMs act as etch resists. Recent R&D explores its use in drug delivery systems, leveraging its ability to modify nanoparticle surfaces. However, environmental concerns have prompted shifts toward shorter-chain fluorinated alternatives in some regions.
Safety and Storage
PFOT is classified as corrosive (GHS Category 1B) and requires stringent safety measures. Direct contact can cause severe skin burns, and inhalation of vapors may lead to respiratory distress. Work areas must have fume hoods, and spills should be neutralized with inert absorbents like vermiculite. Storage mandates airtight containers made of fluoropolymer or stainless steel to prevent degradation. Shelf life is typically 1-2 years when stored below 25°C. Transport regulations often classify it as a hazardous material (UN 2920), necessitating proper labeling and documentation for cross-border shipments.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and expertise in fluorochemicals. Key procurement criteria include batch-to-batch consistency (verified via GC-MS analysis), packaging integrity (nitrogen-inerted drums), and compliance with regional regulations (e.g., EU PFAS restrictions). Negotiate bulk pricing for orders above 10 kg, but confirm lead times due to limited production capacity. Alternatives like perfluorohexyl ethanethiol may be considered for cost-sensitive projects, though performance trade-offs should be evaluated. Always audit the supplier’s waste disposal protocols to ensure environmental responsibility.
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