| Sostanza | Gomma butilica | Lattice | Polietilene clorurato |
Uretano |
PVC |
Nitrile |
Neoprene |
Altro |
| Octachlorotoluene | 1 |
1 |
3 |
4 |
4 |
|||
| Octadecane | 1 |
1 |
3 |
1 |
2 |
|||
| Octane, N- | 4 |
1 |
1 |
3 |
1 |
2 |
||
| Octanol | 3 |
1 |
1 |
|||||
| Oleic Acid | 3 |
1 |
2 |
1 |
1 |
2 |
||
| Oleum Spirits | 4 | 1 |
3 |
1 |
2 |
3 |
||
| Oxalic Acid | 1 |
1 |
1 |
1 |
2 |
2 |
2 |
|
| Oxygen-200-400 F | 4 |
4 |
X |
4 |
4 |
|||
| Oxygen-Cold | 1 |
1 |
1 |
2 |
1 |
|||
| Ozone | 4 | 1 |
1 |
2 |
4 |
3 |