Very Volatile Organic Compounds (VVOCs)

High volatility organic compounds (or very volatile organic compounds, VVOCs) are an important category of indoor air pollutants, and the mostknown VVOC is formaldehyde. Formaldehyde is ubiquitous in indoor environment and mainly originates from the emissions of indoor materials and furniture. The existence of formaldehyde poses severe adverse health effect on people. This chapter introduces the formaldehyde properties and hazards, usages and pollution levels, determination methods, as well as the short-term and longterm emission models, the measurement of key emission parameters in the models, and the impact of environment factors on the key emission parameters and emission rate. This chapter attempts to provide a screen-level impression for the readers, to understand the formaldehyde, which should be helpful for the source characterization and control of formaldehyde in the indoor environment.