Given that the interior of the vehicle is also part of the living space, grasping the concentration of VOC in the air in the passenger compartment is extremely important as part of the exposure assessment. Therefore, in the summer of 2005 – 2006, we conducted a VOC survey in the car room on 44 substances including 8 substances with guideline values set for 37 passenger cars.
Inside the interior of the automobile, some chemical substances such as paints and adhesives are used and the confidentiality is also high, so it is possible that VOC, which is said to be one of the causes of sick houses, may occur.
Although toluene showed a tendency to decrease in concentration when the use period of the car was long, formaldehyde occurred over a long period. Formaldehyde tends to occur more frequently when the room temperature is high, and various chemical substances are emitted from the adhesive used in the interior of the car and the inside of the seat during the daytime when the temperature is high, temporarily very high It became clear that it became concentration, and it turned out that it was necessary to pay particular attention to ventilation especially during the daytime in summer when the temperature was high. Currently, the automobile itself is being replaced by “Independent Initiatives to Reduce VOC by the Automobile Manufacturers Association” *), which is being replaced with indoor environment-friendly products, but consideration must also be given to products brought into the car.