Indoor Air sciences CSMI Practice Exam

Which VOC can commonly originate from paints and solvents in indoor environments?

1. Benzene

2. Formaldehyde

3. Methylene chloride

4. Toluene

The correct answer is: Toluene

Toluene is commonly found in many paints and solvents due to its use as a solvent and an industrial chemical. Its presence is particularly significant in indoor environments where these products are used, as it can evaporate into the air, contributing to indoor air pollution. Toluene has a distinct odor and can have various health effects, making it critical to be aware of its sources in indoor settings. While benzene, formaldehyde, and methylene chloride can also be present in indoor air from various sources, they are less directly associated with paints and solvents compared to toluene. Benzene is often linked more to gasoline and tobacco smoke, whereas formaldehyde is frequently released from building materials and furniture. Methylene chloride is primarily used in paint strippers and solvents, but it is less prevalent in standard household painting products compared to toluene. Understanding the common sources of VOCs like toluene is essential for maintaining healthy indoor air quality.