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N-Ethyl-N-(2-Hydroxyethyl)Perfluorooctanesulfonamide stands out as a specialist chemical in the perfluorinated family, often abbreviated as N-EtFOSE. People in the industry know it for its significant role in manufacturing fluorosurfactants, performance coatings, and specialty polymers. On paper, its molecular formula reads as C12H8F17NO3S. The backbone carries a straight perfluorooctyl chain, joined up with an N-ethyl and a N-(2-hydroxyethyl) group attached to a sulfonamide. This formula speaks a lot about its chemical behavior and why so many manufacturers keep it stocked in their chemical line-up. N-EtFOSE can act as both a surfactant and a building block for larger molecules, particularly those aiming for extreme stain and water repellency. Its unique brand of chemical resistance and low reactivity makes it a go-to for environments that demand performance in harsh settings, such as protective coatings and specialty electronics.
This compound doesn’t fit into a single box. Depending on temperature and purity, you’ll find it shipped out as colorless to pale yellow liquid, fine powder, waxy solid, small white flakes, beads, or, in some pure forms, as crystalline material. Each form brings something different to storage and handling: flakes or powder store easily, liquids mix well in solutions. The density sits on the higher end, ranging roughly between 1.7 and 1.8 g/cm³ at 25°C, something that stands out for a molecule of this size. A lot of this mass comes from those tightly packed fluorine atoms. Its solubility flips the script: dissolves well in polar organic solvents, almost not at all in water, which points back to its heavily fluorinated structure. The molecular weight hovers at 595.23 g/mol, and the overall stability spares users many of the headaches that come from less robust surfactants.
Trade regulations classify N-Ethyl-N-(2-Hydroxyethyl)Perfluorooctanesulfonamide under HS Code 2924.29, aligning it closely with other organic compounds carrying sulfonamide functional groups. Stockists typically quote purities above 95%, a necessity for consistent industrial results. The product’s appearance—whether liquid or flakes—relies on supplier processing, but specifications demand an assay above 95%, a controlled moisture level below 1%, and minimal inorganic impurities. Routine certificates of analysis cover melting point (28-32°C for most solids), detailed chromatographic purity, and density checks. Those numbers don’t just justify a price—they save downtime and ensure compatibility with downstream syntheses like acrylates and urethane prepolymers.
Industry insiders value N-EtFOSE’s ability to boost performance in tough chemical environments. Manufacturers blend it into firefighting foams (AFFF), textiles that shrug off stain, wax coatings for packaging, and certain photoresist agents in microelectronics. Its chemical stability and surface-active properties give coatings long life and consistent protection against moisture and oil. Raw material suppliers often route it towards producing phosphate and acrylate derivatives that give new compounds low surface tension and resistance—properties tough to mimic with non-fluorinated chemistry. Its role as a precursor carries through to fluoropolymer synthesis, making it key for users who want flexibility and consistency from base to finished material.
Responsibility around N-Ethyl-N-(2-Hydroxyethyl)Perfluorooctanesulfonamide comes from the knowledge of perfluorinated chemicals’ persistence and health risks. It stands as a hazardous chemical under GHS, with potential to irritate eyes, skin, and respiratory tract. Some research links exposure and environmental accumulation to bioaccumulation in wildlife, which underlines the importance of careful spill management and waste treatment. Plant operators outfit workspaces with good ventilation, use chemical-resistant gloves, and keep eyewash stations nearby. Safe handling instructions always point toward storing it in sealed containers, out of direct sunlight, and away from oxidizing agents. Industry moves towards greener alternatives, but as long as this compound plays its role, safety data sheets and employee training anchor every shipment and batch. Local regulations often require detailed transport records and specialized labeling, especially for bulk transport.
Chemical Name: N-Ethyl-N-(2-Hydroxyethyl)Perfluorooctanesulfonamide
Formula: C12H8F17NO3S
Molecular Weight: 595.23 g/mol
HS Code: 2924.29
Density: 1.7–1.8 g/cm³ at 25°C
Appearance: Colorless to pale yellow liquid, fine powder, waxy solid, flakes, crystals, pearls
Melting Point: 28–32°C (solid forms)
Solubility: Organic solvents, not water
Use: Surfactant precursor, coatings, firefighting foams, specialty polymers
Hazard: Harmful on contact, environmental concern, proper disposal required
Many folks in manufacturing have started weighing the downsides of persistent chemicals against their performance. There’s a push coming from regulators, researchers, and end-users alike for alternatives that bring water and oil resistance, but break down safely in the environment. Some companies have made the move to short-chain fluorinated chemicals, which show lower bioaccumulation. Others try silicon, phosphorus, or hydrocarbon-based substitutes, but the truth is, none punch quite like perfluorinated chains in tough technical applications. Until those gaps get filled, users of N-Ethyl-N-(2-Hydroxyethyl)Perfluorooctanesulfonamide owe it to workers and the community to keep safety and environmental stewardship at the center of operations. Reuse, careful recovery, and transparent reporting will serve both business and public trust as regulations tighten up on these compounds.
