Properties of Fluorine (F2)

Fluorine is a chemical element with the symbol (F) and atomic number 9. It is a highly reactive, pale yellow-green gas at room temperature and is the most electronegative element on the periodic table. Fluorine is commonly used in industries like electronics, pharmaceuticals, and the production of Teflon and various fluorinated chemicals.

The following table provides a comprehensive list of fluorine properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Click on the icon to switch between Metric and Imperial units.

Table of Fluorine Properties
Physical Properties
Metric
Molar Mass37.997 g/mol
Density (0°C)1.696 kg/m3
Dynamic Viscosity (25°C)23.2 µPa·s
Thermal PropertiesMetric
Melting Point-219.6 °C
Boiling Point-188.1 °C
Thermal Conductivity (25°C)0.027 W/m·K
Specific Heat Capacity (Cp)825 J/kg·K
Critical ConstantsMetric
Critical Temperature (Tc)-129 °C
Critical Pressure (Pc)5.21 MPa
Critical Density (ρc)574 kg/m3
Optical PropertiesMetric
Refractive Index (589 nm)1.000195
Hazardous DataMetric
NFPA Rating (Health)4
NFPA Rating (Fire)0
NFPA Rating (Reactivity)4

Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.