Posted By Paul Leadbetter Joe What the ASL is saying, I think, is that for liquid formulations containing >12.5% of toluene, the formulation must be marked as harmful by inhalation, as high concentrations of toluene in air will affect the central nervous system. What R63 is saying, I think, is that any exposure to toluene, whether by skin contact (as toluene has a 'skin' notation in EH40) or inhalation, carries a risk of harm to the unborn child; the greater the exposure, the greater the risk. Given the understandably emotive nature of the risk, you would surely want to keep exposures very low. Paul