Hydrogen fluoride is a gaseous pollutant with the chemical formula HF. It has no colour and a strong, irritating odour. It is non-flammable.. 

Hydrogen fluoride is a gaseous form of fluoride and can be generated by the combustion of fluorine-containing substances such as PTFE and coal. HF can also be produced in manufacturing processes where fluorine or fluorine containing compounds are used. 

Hydrogen fluoride is a temporary atmospheric pollutant commonly found in urban areas. Inhalation of high concentrations of hydrogen fluoride can be fatal to humans. The capability of HF reacting with the atmosphere is diminished when it is in low concentrations. 

Emissions of hydrogen fluoride can be controlled using gas scrubbers. Often sodiium hydroxide is used to react and produce sodium fluoride solution. 

Alkali Environmental perform periodic measurements of hydrogen fluoride in gaseous streams from stationary sources in line with the standard reference method PD CEN/TS 17340:2020 We are currently working towards accreditation for this method whereby the reported results will carry UKAS and MCERTS accreditation where the method can be performed to the standard. 

These measurements are taken using a manual sampling train whereby a single result is obtained for a gas sample taken from the duct.