| industrial grade | | |
| Purity | Not less than 99%(Mol/Mol) | |
| H2O | Not more than 0.4*10-2(μMol/Mol) | |
| Unbound water | Not detectable | |
| Smell | Tasteless | |
| Oil | Not detectable | |
| food grade | | | | |||
| Total volatile Hydrocarbon | ≤0.01 | Purity | 99.995 | |||
| Benzene | ≤0.003 | H2O | 6.0 | |||
| Acetaldehyde | ≤0.01 | Oil | ≤0.5 | |||
| Total sulfur | ≤0.005 | Oxygen | 3.4 | |||
| Sulfide dioxide | ≤0.005 | Odourtaste&facade | / | |||
| Carbon Monoxide | ≤2.0 | Smell | / | |||
| Nitric oxide & nitrogen diode | ≤1.0 | Non-volatile residue | ≤0.5 | |||
