| CHEMICAL BASE | ISOBUTANE |
| PURITY (w/w %) | min. 95 |
| ETHANE (w/w %) | max. 0,02 |
| N-BUTANE (w/w %) | max. 3,0 |
| PROPANE (w/w %) | max. 2,0 |
| PENTANE (w/w %) | max. 0,02 |
| SULPHUR (ppm) | max. 1,0 |
| ODOUR | not detected |
| CHEMICAL BASE | ISOBUTANE |
| PURITY (w/w %) | min. 95 |
| ETHANE (w/w %) | max. 0,02 |
| N-BUTANE (w/w %) | max. 3,0 |
| PROPANE (w/w %) | max. 2,0 |
| PENTANE (w/w %) | max. 0,02 |
| SULPHUR (ppm) | max. 1,0 |
| ODOUR | not detected |