sulfuryl fluoride
sulfuryl fluoride
CAS: 2699-79-8
Molecular Formula: F2O2S
sulfuryl fluoride - Names and Identifiers
| Name | sulfuryl fluoride |
| Synonyms | Difluoro sulfone fluorodesulfurilo sulfuryl fluoride SULFURYL FLUORIDE SULPHURYL FLUORIDE Sulphuryl fluoride fluoruredesulfuryle sulfuryl difluoride Sulfonyl difluoride Sulfuric oxyfluoride sulphuryl difluoride Fluorure de sulfuryle |
| CAS | 2699-79-8 |
| EINECS | 220-281-5 |
| InChI | InChI=1/F2O2S/c1-5(2,3)4 |
sulfuryl fluoride - Physico-chemical Properties
| Molecular Formula | F2O2S |
| Molar Mass | 102.06 |
| Density | gas: 4.55g/L; liq; 1.7 [CRC10] |
| Melting Point | -121,4°C |
| Boling Point | -55,2°C |
| Water Solubility | mL SO2F2/100mL solvent: 4–5, H2O; 24–27, alcohol; 210–220, toluene; 136–138, CCl4, [MER06] |
| Vapor Presure | 10700mmHg at 25°C |
| Appearance | colorless gas |
| Stability | Stable. Reacts with water. |
| Refractive Index | 1.293 |
| Use | Widely used in cotton, silk, chemical fiber fabric, leather, Chinese herbal medicine, tobacco, bamboo and wood, crafts, cultural relics archives and other warehouses |
sulfuryl fluoride - Risk and Safety
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R50 - Very Toxic to aquatic organisms R48/20 - R23 - Toxic by inhalation |
| Safety Description | S23 - Do not breathe vapour. S37/39 - Wear suitable gloves and eye/face protection S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S60 - This material and its container must be disposed of as hazardous waste. S63 - |
| UN IDs | 2191 |
| Hazard Note | Corrosive |
| Hazard Class | 2.3 |
sulfuryl fluoride - Upstream Downstream Industry
| Raw Materials | sulfur dioxide Hydrofluoric Acid Chlorine |
sulfuryl fluoride - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | sulfuryl fluoride has the chemical formula SO2F2 and is a colorless and odorless gas at room temperature. it is a commonly used fumigant in industry with a wide range of sources and extremely low price. Sulfuryl fluoride is the simplest and cheapest method to prepare fluorosulfonate compounds in the presence of alkali, but until recently, these related chemicals have attracted people's attention. |
| use | used for fumigation of buildings, vehicles and ships and wood products to prevent termites, cockroach, family beetles, rodents, etc. widely used in cotton, silk, chemical fiber fabrics, leather, traditional Chinese medicine, tobacco, bamboo and wood ware, handicrafts, cultural relics archives and other warehouses to kill insects |
| production method | 1. after barium chloride reacts with fluorosulfonic acid to generate barium fluorosulfonate, heating barium fluorosulfonate to decompose it to prepare thioyl fluoride: add 100g HSO3F into an iron container with a volume of about 500mL, and the container has a lid that can be screwed on and a gas outlet tube, in the case of cold, divide 100g BaCl2 into small parts and add it to the container. When all BaCl2 is added, screw the cover on. Heat at 100 ℃ to remove HCl generated by the reaction. When HCl is no longer released, connect the gas outlet pipe with the water flow pump and heat to 120~150 ℃ under vacuum to remove excess HSO3F and residual HCl. Then the gas outlet tube is connected with a cold trap immersed in liquid nitrogen, and the iron reactor is heated to solve Ba(SO3F)2. Ba(SO3F)2 starts to decompose at 400 ℃, and the decomposition reaction occurs violently at 450~500 ℃. SO2F2 generated by decomposition condenses into solid in cold trap. After the decomposition reaction is completed, the cold trap is warmed, the product in it is volatilized and passed through a washing cylinder filled with KMnO4 solution to remove SO2 in it, and then through a washing cylinder filled with concentrated sulfuric acid and a drying tube filled with phosphorus pentoxide Drying, and then condensed in a cold trap immersed in liquid nitrogen. Finally, it is distilled and purified, the beginning and end fractions are discarded, and the intermediate fractions are collected as products. 2. A stainless steel tube (also copper or nickel tube) is filled with about 400g AgF2. One end of the reaction tube is connected with a cylinder containing SO2 and N2 through a "T"-shaped tube, and its outlet end is connected with a cold trap with pistons at both ends. First, the whole system is purged with N2, and the cold trap is frozen with liquid nitrogen. Then the mixed gas of SO2 and N2 (containing SO2 about 80%) enters the reaction system at a flow rate of 0 3~0 8L/min. The heat is released during the reaction, and the process of the reaction can be understood according to the movement of the heating area in the reaction tube. When the heating zone reaches the end of the reaction tube, the reaction is basically completed. The SO2F2 produced by the reaction and the unreacted SO2 are solidified together in a cold trap. After the end of the reaction, the cold trap is disassembled from the system, and the product is vacuum distilled to another cold trap frozen with liquid nitrogen. In order to remove SO2 mixed in it, it can be further fractionated and purified by fractionating column, or washed with saturated KI solution and then fully dried to enter the storage cylinder frozen with liquid nitrogen. |
| category | compressed gas and liquefied gas |
| toxicity classification | highly toxic |
| acute toxicity | inhalation-rat LC50: 991 PPM/4 hours; Oral administration-rat LD50: 100 mg/kg |
| flammability hazard characteristics | non-combustible; sulfur oxides and fluoride gases released from the fire site |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food raw materials |
| fire extinguishing agent | chemical dry powder, carbon dioxide, water spray, polymer foam? I |
| occupational standard | TWA 20 mg/m3; STEL 40 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 200 ppm |
Last Update：2024-04-10 22:29:15
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Raw Materials for sulfuryl fluoride