Sulfur free odorants, also known as sulfur free odorants/S-free odorant , have the same function as conventional odorants. They are a substance that can serve as a warning and have strong mixing ability with natural gas. They are in a gaseous state in gas pipelines and have a more prominent “warning odor” compared to conventional odorants. They do not corrode natural gas pipelines and equipment, and do not pose a threat to human health and the environment during combustion.
| Ingredients | A mixture of over 95% acrylic esters |
| Purity | 99.72% |
| Melting point | -80 ℃ (atmospheric pressure) |
| Boiling point | 80 ℃ (760mmHg) |
| Water solubility | insoluble in water |
| Density | 0.933 (kg/L) |
| Appearance | Colorless and transparent liquid |
| Flash point | 5 ℃ |
| Application | Odorization of natural gas pipeline network |
| Hazard symbols | Class III |
| Hazard description | Flammable and toxic liquid |
| Product name | S-free Gas Odorant |
Basic properties of sulfur free odorants
Sulfur free odorant is a colorless and transparent liquid with a strong pungent odor. It is a mixture composed of C4H6O2 (methyl acrylate), C5H8O2 (ethyl acrylate), and C7H10N2 (3-ethyl-2-methylpyrazine), with mass fractions of 37.4%, 60.0%, and 2.5%, respectively. The relative molecular weight of sulfur free odorant is 95.543, with a boiling point of 80 ℃ and a melting point of -80 ℃ under normal pressure. The self ignition temperature is 395 ℃, and the explosion limit is 1.6% to 23.0%. It is insoluble in water but soluble in ethanol and ether. Sulfur free odorants do not contain sulfur, and the combustion products do not pollute the environment.
