What is the main use of sulfuryl fluoride?

Sulfuryl fluoride (sulfuryl fluoride) is a chemical substance with a wide range of main uses. In the past, this substance was often used in the following ends.

First, sulfuryl fluoride is a powerful tool in the prevention and control of storage pests. In storage, grains, dry goods and other substances are often infested by insects, resulting in damage to their quality and reduced quantity. Sulfuryl fluoride can permeate the storage space due to its efficient fumigation performance, penetrate into the gap between goods, and kill all the pests hidden in it, such as rice elephants and goats. Because it can achieve good insecticidal effect at a relatively low dose and has little impact on the goods, it is favored by warehousers.

Second, sulfuryl fluoride also has excellent performance in the prevention and control of termites in buildings. Termites are very harmful to wooden structures, often causing loose building foundations and structural damage. Sulfuryl fluoride can penetrate building materials through fumigation, reach termite nests, and deal a devastating blow to termite colonies, thus ensuring the safety and stability of buildings.

Third, in some museums, libraries and other places, sulfuryl fluoride also plays an important role in protecting precious cultural relics and classics from pest erosion. Such places are invaluable, and traditional control methods may cause damage to them. And sulfuryl fluoride can not only effectively remove insects, but also minimize damage to cultural relics and classics, which is an ideal choice. In addition, in the industrial field, sulfuryl fluoride is sometimes used in the treatment of certain special materials to remove possible harmful organisms and ensure that the quality of the material is not affected by biological contamination.

What are the physical properties of sulfuryl fluoride

Sulfuryl fluoride is a colorless, odorless gas that is extremely stable at room temperature and pressure. It has the following physical properties:

First of all, its color and taste state, pure sulfuryl fluoride is colorless and odorless, and it is difficult for ordinary people to detect it by smell. However, in practical applications, warning agents are often added so that people can perceive it. Its boiling point is quite low, about -55.2 ° C, which makes it easy to form a gaseous state at room temperature, which is easy to diffuse in space and achieve the purpose of fumigation. The melting point is -135.8 ° C, and it can be solid at low temperatures.

Furthermore, the density of sulfuryl fluoride is greater than that of air, which is about 3.7 times that of air. This is due to the large relative molecular mass. Therefore, when used, the gas is easily deposited in the lower part of the space, which can effectively contact with pests, pathogens, etc., and enhance the fumigation effect.

In terms of solubility, sulfuryl fluoride is slightly soluble in water, and at 25 ° C, only about 0.07 grams of sulfuryl fluoride can be dissolved per 100 grams of water. However, it can be soluble in most organic solvents, such as acetone, benzene, etc. This property is of great significance in the formulation and specific application scenarios.

In addition, sulfuryl fluoride has a low dielectric constant and is an excellent electrical insulator. It is widely used in the fumigation treatment of electrical equipment. With a critical temperature of 63.8 ° C and a critical pressure of 5.12 MPa, it can assume a supercritical fluid state under specific conditions, providing possibilities for special process applications.

What are the effects of sulfuryl fluoride on human health?

Sulfuryl fluoride is a kind of fumigant, which is quite useful in preventing insects and rodents. However, it also affects human health.

Inhalation of sulfuryl fluoride initially irritates the eyes, nasal cavity and throat, causing discomfort, or coughing and asthma. If inhaled too much, it can cause dizziness, headache, fatigue, and even nausea, vomiting, which affects the nervous system. Exposure to sulfuryl fluoride for a long time can damage the liver, kidneys and other organs.

Touch the skin, or cause allergies, redness, and itching. If it enters the eyes, it can irritate the eye mask, or cause vision impairment.

Furthermore, sulfuryl fluoride is potentially carcinogenic. Although it plays a significant role in the field of fumigation, it must be used with caution and strictly abide by the operating procedures to protect human health. Operators need to prepare protective equipment to ensure that the environment is well ventilated and reduce the harm to the human body. Do not neglect prevention because of its efficacy.

What to pay attention to when storing and transporting sulfuryl fluoride

Sulfuryl fluoride is a highly toxic fumigant. During storage and transportation, many matters must be paid attention to.

It is lively and requires strict storage conditions. It should be placed in a cool, ventilated and dry place, away from fires and heat sources. The temperature of the warehouse must not exceed 30 ° C, because it is easy to decompose when heated, resulting in toxic and corrosive gases, which threaten the safety of people and the environment. And the warehouse must have good lightning protection facilities to prevent package damage and leakage due to lightning strikes.

Packaging must be sturdy and tight. Use special pressure vessels to ensure that there is no risk of leakage. The packaging material should be resistant to sulfuryl fluoride corrosion, and the seal should be tight to prevent gas from escaping. Post a highly toxic logo in a prominent position outside the package to warn others.

When transporting, be sure to choose a professional hazardous chemical transportation vehicle. Vehicles should be equipped with complete emergency treatment equipment, such as fire extinguishers, leakage emergency treatment tools, etc. Transportation personnel need to be professionally trained and familiar with the characteristics of sulfuryl fluoride and emergency treatment methods. During transportation, the driving route should avoid sensitive areas such as water sources and densely populated areas to prevent large-scale hazards caused by leakage. The transportation process should be stable to avoid bumps and collisions that cause packaging damage.

Storage and transportation of sulfuryl fluoride should strictly follow relevant regulations and operating procedures to ensure the safety of personnel and the environment from pollution.

What are the production methods of sulfuryl fluoride

Sulfuryl fluoride is prepared by various methods. One method uses sulfur dioxide and fluorine gas as raw materials. The two interact in a specific reaction vessel under suitable temperature and pressure conditions. The activity of fluorine gas combines with sulfur dioxide to react and form sulfuryl fluoride. During this reaction process, precise temperature control is required. If the temperature is too high or too low, it can affect the purity and yield of the product. If the temperature is too high, it may cause side reactions to occur and produce impurities; if the temperature is too low, the reaction rate will be slow and take a long time. The pressure also needs to be adapted to help the reaction proceed smoothly.

The second method uses chlorosulfonic acid and hydrogen fluoride as the starting material. In a specific reaction environment, sulfuryl fluoride can be obtained through a series of chemical changes. In this process, the reaction medium is very critical, and different media have an impact on the rate and direction of the reaction. And the proportion of the reactants also needs to be carefully adjusted. If the proportion is not correct, it may cause waste of raw materials or impure products.

There are also those who use sulfuryl chloride and silver fluoride as raw materials. The two react in an appropriate solvent. The silver ion of the fluoride combines with the chloride ion of the sulfuryl chloride to form a silver chloride precipitation and sulfuryl fluoride at the same time. This reaction requires attention to the choice of solvent. The selected solvent needs to be able to dissolve the reactants and not react adversely with the reactants and products to ensure that the reaction proceeds smoothly and efficiently. Different preparation methods, each with its own advantages and disadvantages, should be based on actual needs, such as product purity requirements, cost considerations, etc., to choose the appropriate method.