This standard specifies a method of measuring the concentration of volatile organic compounds (VOC) emitted from auto parts in order to reduce in-cabin VOC. Of substances listed as interior air contaminants in the guideline designated by Ministry of Health@ Labor and Welfare@ subject to this standard are TVOC and eight substances: formaldehyde@ acetaldehyde@ toluene@ xylene@ ethyl benzene@ styrene@ tetradecan and p-dichlorobenzene.