آرشیو برچسب های: کلروفرم

Chloroform is a chemical substance found in nature and is also produced artificially. The biggest reason everyone knows chloroform is that it has been used for anesthesia throughout history. Although chloroform is not used for this purpose today, it still holds a place in our memory. Chloroform, also known as trichloromethane and methyl trichloride, is a chemical compound with the formula CHCl3. This compound is a colorless and volatile liquid at room temperature, but it is not flammable. This chemical compound is a highly effective solvent for various organic compounds used in scientific research and industrial processes. The article in KHC Dental provides further details on this, please join us. ?What is Chloroform Chloroform is a natural organic compound found in the air and coastal waters, lakes, and groundwater. However, most of the trichloromethane present in the environment is produced by humans. Higher levels of this chemical are found in industrial areas and the air above swimming pools where the water is disinfected with chlorine. Chloroform is a liquid with a sweet smell, similar to ether, and is 40 times sweeter than sugar in taste. Some people compare its smell to that of disinfectants, similar to the scent experienced in hospitals and treatment centers. Chemists describe the odor of chloroform as vaguely resembling that of acetone.This compound is used as a solvent for extracting fats, oils, greases, rubber, wax, resin, lacquer, producing synthetic silk, gum, and adhesives. It is also used as an industrial solvent in the extraction and purification of certain antibiotics, alkaloids, vitamins, and flavorings. This substance is also used as a solvent in organic chemistry, photography, and in the manufacture of paints, medicines, and pesticides. Its other applications include stain removal in dry cleaning, as a fumigant, and in fire extinguishers to reduce the freezing point of carbon tetrachloride.Chloroform formulated with other substances is used to control roundworms in animals. This compound is being continuously replaced with less toxic solvents and may no longer be used in some of these applications. Its use as an inhalation anesthetic during surgery has also largely ceased. History of the Discovery of Chloroform Moldenhauer, a German pharmacist, was the first to synthesize chloroform in 1830. Although he mistakenly named it chloric ether. His method involved combining chlorinated lime or calcium hypochlorite with ethanol. After experiments by Justus von Liebig and Eugene Soubeiran, this chemical compound was identified in 1834. The French chemist Jean-Baptiste Dumas discovered its empirical formula and named it chloroform. The potent effect of this compound as an anesthetic was demonstrated in 1842 by Robert Mortimer Glover through experiments on laboratory animals. James Simpson was the first person to use this compound on humans during surgery in 1847, which led to chloroform being recognized as the best anesthetic in the world. Formula and Chemical Structure of Chloroform Chloroform is a relatively simple organic compound with the formula CHCl3, consisting of a central carbon atom along with three chlorine atoms and one hydrogen atom. In the chloroform molecule, the repulsive forces between the hydrogen and chlorine atoms shape this molecule into a perfect quadrilateral. These forces push the surrounding atoms as far apart as possible, leading to geometric symmetry and specific angles in the molecule. The covalent bonds within this molecule make it slightly polar, which causes chloroform to dissolve in water. The structure of a molecule determines how it reacts with other chemical substances and how it interacts with biological functions such as neurotransmitters. Organic compounds that include two or more halogen atoms are generally known as polyhalogenated compounds. The high reactivity of these compounds has made them a very important category of chemical materials. Chloroform also falls into this category of compounds. Despite evidence that these compounds have negative impacts on the environment and human health, industries continue to use them due to their numerous applications and high diversity of uses. Chemical and Physical Properties of Chloroform Appearance and physical characteristics: colorless liquidMolecular weight: 119.38 grams per moleMelting point: -63.41 degrees Celsius (-82.14 degrees Fahrenheit)Boiling point: 61.17 degrees Celsius (142.1 degrees Fahrenheit)Solubility: slightly soluble in water, and well soluble in ethyl alcohol, ether, acetone, benzene, and other organic solventsFlash point: 60.5-61.5 degrees CelsiusStorage temperature: 2-8 degrees Celsius ?What are the Applications of Chloroform Chloroform is used as a solvent for iodine, alkaloids, fats, and some other substances. This compound is mainly used in the production of the refrigerant Freon R-22. The use of R-22 as a refrigerant in developed countries has been discontinued due to issues related to global warming, but it still has a high demand in developing countries due to its ease of access and production.Once the effects of this compound were identified, it was used as an important anesthetic in medical surgeries. Even some criminals use it to incapacitate their victims.It is said that inhaling air containing 900 ppm of chloroform can lead to dizziness, headaches, and fatigue. With the discovery of the toxicity of this compound and its harmful effects on the liver, kidneys, and central nervous system, its use as an anesthetic was replaced by safer products.The toxicity of this substance is attributed to phosgene. The oxidation of chloroform under light can produce a highly toxic gas known as phosgene. For this reason, chloroform is stored in dark bottles with narrow openings that are completely full to prevent any contact with air. ?What Is the Application of Chloroform In Dentistry Dental chloroform is one of the materials used for local anesthesia in root canal treatment and tooth nerve extraction. Production of Chloroform This compound is produced by heating a mixture of chlorine and methane. At temperatures of 400-500 degrees Celsius, halogenation occurs through a radical chain reaction, leading to the conversion of methane or chloromethane into chlorinated compounds. CH 4 + Cl 2 → CH 3 Cl + HCl CH 3 Cl + Cl 2 → CH 2 Cl 2 + HCl CH 2 Cl 2 + Cl 2 → CHCl 3 + HCl When chloroform is exposed to more chlorine, it […]