What is the definition of a VOC in Europe and elsewhere ?
There are a number of different definitions of VOCs throughout the world, including those based upon vapour pressure, boiling points and reactivity of organic species. The most usual definition in Europe is the one stated in the Solvent Emissions Directive, which defines a VOC as ‘any organic compound having at 293.15K a vapour pressure of 0.01 kPa or more, or having a corresponding volatility under the particular conditions of use.’ A number of European countries, however, have developed their own definition in specific contexts, e.g. Austria (in the 1995 Solvent Ordinance, a VOC has a maximum boiling point of 200C) or Switzerland (Their “VOC Ordinance” defines a VOC as organic compounds with a maximum boiling point of 240C). Therefore the local legislation relative to a specific sector should always be consulted to ensure the appropriate definition is being used in the context of interest.
