Sulfur hexafluoride
Sulphur hexafluoride
CAS: 2551-62-4
Molecular Formula: F6S
Sulfur hexafluoride - Names and Identifiers
| Name | Sulphur hexafluoride |
| Synonyms | Elegas Esaflon OC-6-11 Sulfur hexafluoride Sulphurhexafluoride2 hexafluoruredesoufre Sulphur hexafluoride Hexafluorure de soufre (OC-6-11)-Sulfurfluoride hexafluoro-lambda~6~-sulfane hexafluoruredesoufre(french) (oc-6-11)-sulfurfluoride(sf6 sulfur(+2) dihydride cation difluoride sulfur hexafluoride cyl. with 4.75 kg (~net) |
| CAS | 2551-62-4 |
| EINECS | 219-854-2 |
| InChI | InChI=1/2FH.H2S/h2*1H;1H2/q;;+2/p-2 |
Sulfur hexafluoride - Physico-chemical Properties
| Molecular Formula | F6S |
| Molar Mass | 146.05 |
| Density | 6.602 |
| Melting Point | −50°C(lit.) |
| Boling Point | −64°C1mm Hg(lit.) |
| Water Solubility | slightly |
| Vapor Presure | 22 mm Hg ( 21.1 °C) |
| Vapor Density | 5.11 (vs air) |
| Appearance | colorless gas |
| Merck | 13,9063 |
| Stability | Stable. Non-flammable. Explodes on contact with disilane. Reacts with sodium. |
| Physical and Chemical Properties | Inert, non-combustion gas. Colorless, odorless, tasteless. melting point -50.5 ℃ relative density 6.602 solubility slightly soluble in water, alcohol and ether, soluble in potassium hydroxide. |
| Use | In the high-voltage switch used as arc-extinguishing, in large-capacity Transformers and high-voltage cable as insulating material, but also for the particle accelerator and lightning arrester, but also can be used as refrigerant |
Sulfur hexafluoride - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 37 - Irritating to the respiratory system |
| Safety Description | 38 - In case of insufficient ventilation, wear suitable respiratory equipment. |
| UN IDs | UN 1080 2.2 |
| WGK Germany | - |
| RTECS | WS4900000 |
| Hazard Note | Irritant |
| Hazard Class | 2.2 |
Sulfur hexafluoride - Upstream Downstream Industry
Sulfur hexafluoride - Nature
Open Data Verified Data
under normal temperature and pressure is a colorless, tasteless, odorless, non-toxic gas. Melting Point -50.8 ℃; Sublimation temperature -63.8 ℃; Critical temperature 45.6 ℃; Critical pressure 3. 37MPa; Relative density (liquid -50.8 ℃)1. 88. Gas is chemically inert, rarely soluble in water, slightly soluble in alcohol. It can be used as a special refrigerant in the temperature range of -45 to 0 °c. Sulfur hexafluoride has excellent heat resistance, chemical stability, pure state even in the above 500 deg C also does not decompose, is a stable high temperature heat carrier. And has good electrical insulation performance and excellent arc extinguishing performance. Its electrical strength is 2.5 times that of nitrogen under the same pressure, the breakdown voltage is 2.5 times that of air, and the breakdown voltage of the oil is the same at 0. 25MPa. Hexacyanide does not corrode all metals. Its decomposition products are corrosive, the presence of moisture or at high temperatures, this corrosion will increase.
Last Update：2024-01-02 23:10:35
Sulfur hexafluoride - Preparation Method
Open Data Verified Data
with industrial sulfur hexafluoride as raw material, high purity sulfur hexafluoride products can be prepared by adsorption drying, freezing and curing, vacuum degassing.
Last Update：2022-01-01 08:54:40
Sulfur hexafluoride - Use
Open Data Verified Data
A new generation of ultra-high voltage insulating dielectric materials. As a good gas insulator, it is widely used for gas insulation of electronic and electrical equipment. Electronic grade high purity sulfur hexafluoride is an ideal electronic etchant, which is widely used in the field of microelectronics technology. It is used as plasma etching and cleaning agent in the manufacture of large integrated circuits such as computer chips and LCD screens. It is used as a fluorine source for the production of fluorine-doped glass in the preparation of optical fibers and as a dopant for the isolation layer in the production of low-loss and high-quality single-mode optical fibers. It can also be used as a doping gas for a nitrogen excimer laser. Used as a tracer, standard gas or standard mixture in meteorological, environmental monitoring and other departments.
Last Update：2022-01-01 08:54:40
Sulfur hexafluoride - Safety
Open Data Verified Data
sulfur hexafluoride is a kind of suffocation agent, in high concentrations will be Dyspnea, wheezing, skin and mucous membrane Blue, generalized spasm. Inhalation of 80% sulfur hexafluoride + 20% oxygen gas mixture after a few minutes, the human body will appear limb numbness, and even suffocation death. China provides that the allowable concentration of sulfur hexafluoride gas in the air of the operating room is not greater than 6g/m3 or the oxygen content in the air should be greater than 18%; Short-term contact, the allowable concentration of sulfur hexafluoride in air is not more than 7.5g/m3. Store in a cool, ventilated warehouse. The temperature in the bin should not exceed 45. Keep away from fire and heat source. Protection from direct sunlight. Should be stored separately from flammable or combustible materials.
Last Update：2022-01-01 08:54:42
Sulfur hexafluoride - Introduction
Sulphur hexafluoride is a colorless gas with a pungent odor. Its chemical formula is SF6 and its molecular weight is 146.05g/mol. Sulphur hexafluoride has good chemical stability and does not react with other substances under most conditions. It is a very powerful oxidant and can react with many organic and inorganic substances.
Sulphur hexafluoride has several important applications. First of all, it is widely used as an insulator in power equipment, substations and power transmission systems because of its high electrical insulation capacity and thermal stability. Secondly, Sulphur hexafluoride can be used as a self-pressurized gas, which is used in the atmospheric environment in electronic equipment in specific fields to prevent arc breakdown. In addition, Sulphur hexafluoride also has applications in semiconductor manufacturing, fluorescent materials, medical imaging and other fields.
The method of preparing Sulphur hexafluoride is mainly through the reaction of sulfur and fluorine gas. The most common method is to pass sulfur through fluorine gas into a suitable catalyst, such as silicon difluoride, at high temperature (500-600 ° C.).
Pay attention to safety issues when using and storing Sulphur hexafluoride. Sulphur hexafluoride belongs to high-pressure gas, which has strong insulating ability, but also has the risk of suffocation. Avoid contact with skin and eyes during operation, and ensure that the working environment is well ventilated to avoid leakage into the environment. During storage, the Sulphur hexafluoride should be placed in a sealed container and stored in a dark, dry, well-ventilated place.
Generally speaking, Sulphur hexafluoride is an important chemical substance with good insulation ability and chemical stability, and is widely used in power equipment and electronic industries. However, when using and storing, it is necessary to strictly observe the relevant safety operation regulations.
Sulphur hexafluoride has several important applications. First of all, it is widely used as an insulator in power equipment, substations and power transmission systems because of its high electrical insulation capacity and thermal stability. Secondly, Sulphur hexafluoride can be used as a self-pressurized gas, which is used in the atmospheric environment in electronic equipment in specific fields to prevent arc breakdown. In addition, Sulphur hexafluoride also has applications in semiconductor manufacturing, fluorescent materials, medical imaging and other fields.
The method of preparing Sulphur hexafluoride is mainly through the reaction of sulfur and fluorine gas. The most common method is to pass sulfur through fluorine gas into a suitable catalyst, such as silicon difluoride, at high temperature (500-600 ° C.).
Pay attention to safety issues when using and storing Sulphur hexafluoride. Sulphur hexafluoride belongs to high-pressure gas, which has strong insulating ability, but also has the risk of suffocation. Avoid contact with skin and eyes during operation, and ensure that the working environment is well ventilated to avoid leakage into the environment. During storage, the Sulphur hexafluoride should be placed in a sealed container and stored in a dark, dry, well-ventilated place.
Generally speaking, Sulphur hexafluoride is an important chemical substance with good insulation ability and chemical stability, and is widely used in power equipment and electronic industries. However, when using and storing, it is necessary to strictly observe the relevant safety operation regulations.
Last Update：2024-04-10 22:29:15
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