This Digest describes sources of VOCs in indoor environments, methods to control the amount of emissions from building products, and the available VOC guideline values for assessing indoor air quality in buildings. Part 1 of this Digest summarises the VOCs and the range of TVOC emission rates from some typical wall and flooring materials used in buildings. Environmental chamber test methods for measuring VOC emissions from building materials were briefly described. Part 2 (this part) describes the air quality guidelines and the emission databases used for assessing the impact of VOC emissions in the indoor environment; also labelling schemes for controlling VOC emissions from building materials. 8 pages.