Verdampbare

Verdampbare is a term used in chemistry and related fields to describe substances that can transition to the vapor phase under given conditions. In German technical usage, it denotes components with an appreciable tendency to evaporate, as opposed to non-volatile residues. It can function as an adjective (verdampfbar) or as a nominal form used to refer collectively to volatile components in a mixture.

Key properties include vapor pressure, boiling point, and temperature-dependent volatility. Substances with high vapor pressure at room temperature or moderate heating are considered verdampfbar. Their rate of evaporation depends on ambient temperature, pressure, surface area, and interactions with solvents or matrices.

Applications of verdampfbare substances span solvents in paints and coatings, cleaners, pharmaceuticals, and manufacturing processes where removal by evaporation is required. In microelectronics and materials science, verdampfbare solvents enable drying and degreasing. They are also important from environmental and safety perspectives due to inhalation hazards and emissions of volatile organic compounds (VOCs).

Measurement and analysis focus on assessing verdampfbare characteristics through vapor pressure data, boiling points, and activity in mixtures. Techniques include gravimetric loss studies, vapor pressure correlations such as the Antoine equation, and headspace gas chromatography for volatile components.

See also: volatility, volatile organic compounds, headspace analysis, evaporation.