© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Tetrafluoromethane stands as a colorless, non-flammable gas at room temperature. Most people in the chemical industry know it by its formula CF4. While often found as a gas, Tetrafluoromethane transitions to a liquid at -128°C under atmospheric pressure and drops further down to a solid below -183°C. The molecular weight clocks in at 88.0043 g/mol, and this gas issues no distinct odor or taste, so its presence often goes unnoticed without proper detection tools. It draws attention not only as a stable compound but also because its persistence in the atmosphere brings environmental discussion to the fore. The HS Code for trade and regulatory purposes is 29033990, making product classification easier for customs and international markets.
CF4 features one carbon atom at the core with four fluorine atoms attached in a symmetrical tetrahedral shape. This geometry makes the molecule highly stable, both chemically and thermally, leading to an inert profile in most conditions. The density of gaseous Tetrafluoromethane settles around 3.72 kg/m3 at 25°C and 1 atm. When shifted into its liquid or solid states, density notably increases, reaching approximately 1.6 g/cm3 as a solid. Looking at phase transitions, Tetrafluoromethane moves from liquid to solid seamlessly under cooling, forming a crystalline solid that often gets described as flakes or pearls depending on processing. The boiling point sits at -128°C, the melting point at -183°C, both much lower than that of water or many hydrocarbon gases.
Industrial and electronics applications require high-purity Tetrafluoromethane, typically at 99.99% or even higher. In gas supply chains, purity stands as a direct factor for process reliability, especially in semiconductor etching or as a refrigerant gas. Contaminants such as moisture, oxygen, and hydrocarbons must cling to very low ppm levels or less, because even small impurities can dramatically affect results in sensitive applications. Suppliers often fill and distribute Tetrafluoromethane in specialty gas cylinders, sized from small laboratory bottles to ton-sized tanks for large users. Solutions for bulk storage and transport use cryogenic tankers to handle the product in liquid form, keeping it deeply chilled and under pressure.
In electronics, Tetrafluoromethane plays a crucial role as an etching gas for silicon and silicon dioxide. Cleanroom environments run reactors using this compound for controlled removal of wafer layers, enabling microchip production at the nanometer scale. Metal industries lean on the gas for plasma processing and surface treatments, turning to its stability and reactivity under high energy. In refrigeration, it joins as a raw material for specialty blends or as a calibration gas due to its consistent behavior. Medical and research fields, while using only select quantities, still value the unique properties for analytical standards and instrument calibration.
Tetrafluoromethane resists reaction under normal storage or atmospheric conditions, largely due to the strength of its carbon-fluorine bonds. Only exposure to high-energy sources like plasma or electrical discharges gets the molecule moving toward decomposition. In those situations, hazardous byproducts including fluorine and other trifluoromethyl compounds may rise. Safe handling means using well-ventilated spaces, proper leak detection, and strict avoidance of open flames or arcs. Spills in open air will dissipate due to the gas’s low boiling point, but closed areas risk rapid oxygen displacement. Even in its apparently benign, colorless gas state, Tetrafluoromethane’s asphyxiation dangers loom large during cylinder storage or line purging activities.
Inhalation of high concentrations of CF4 can cause dizziness, nausea, or suffocation, with the effects tied to oxygen displacement. It falls into the group of greenhouse gases with a global warming potential over 6,500 times that of CO2 over a century, and an atmospheric lifetime estimated at 50,000 years. So, even marginal releases during manufacturing, use, or disposal leave a long shadow in environmental terms. Mitigation strategies push users to adopt leak-prevention equipment, gas recycling, and destruction systems if feasible. Industry trends also encourage swapping CF4 for alternatives carrying lower climate impacts whenever technical standards allow, though in some microelectronics applications, no perfect substitute matches its precision and results.
Production draws from carbon sources reacting with fluorine or other fluorinating agents, a process that raises hazards of its own. Raw material supply integrity carries weight for reliability, as interruptions can impact semiconductor yields or delay research timelines. This upstream context spotlights the importance of international trade flows, especially as demand rides on the backs of technology and energy sectors. Safety, sustainability, and efficiency in the supply chain give users peace of mind that the Tetrafluoromethane they rely on neither puts workers at risk nor unduly contributes to global environmental problems.
