| Subject | English | French |
| environ. | non-volatile substance | substance non volatile |
| environ. | non-volatile substance Substance that is not capable of changing from a solid or liquid form to a vapour | substance non volatile |
| health. | volatile substance | matière volatile |
| environ. | volatile substance A substance capable of readily changing from a solid or liquid form to a vapour; having a high vapour pressure and a low boiling point | substance volatile |
| chem. | volatile substance | substance volatile |
| chem. | volatile substance | substance chimique volatile |