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Blood:air partition coefficient (PC) and permissible exposure level (PEL) data (given in parts per million) for C6-C8 hydrocarbons.
| Carbon number | Compound | PC | PEL |
|---|---|---|---|
| 6 | benzene | 7.8 | 1 |
| Cyclohexane | 1.3 | 300 | |
| 7 | toluene | 15.6 | 300 |
| n-heptane | 1.9 | 500 | |
| 8 | p-xylene | 28.4 | 100 |
| n-octane | 3.1 | 500 |
The aromatic compound is listed first in each carbon number pair.
PEL values are those used by OSHA (OSHA, 2014).
