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Anonymous users2024-02-08They have different chemical formulas: methanol (CH3OH), ethanol (CH3CH2OH), isopropanol (C3H8O).
Methanol is a colorless and flammable liquid with an alcohol-like odor, a boiling point of 65, and miscible with water in any ratio. Methanol is toxic, drinking 10ml can blind the eyes, and more can poison people to deathMethanol is an excellent organic solvent, or a raw material for the manufacture of formaldehyde. Methanol can be blended into gasoline or diesel as fuel for internal combustion engines.
Since syngas is prepared with coke (a product of coal dry distillation), the use of methanol as fuel can save petroleum resources, and the methanol combustion products do not pollute the environment. ）
Ethanol is a colorless, transparent, special fragrance liquid (volatile), less dense than water, and can be miscible with water in any ratio (generally not used as an extractant). It is an important solvent that can dissolve a variety of organic and inorganic substances.
Isopropanol, commonly known as IPA, is a colorless transparent liquid with an odor similar to a mixture of ethanol and acetone.
Methanol is the main component of industrial alcohol, and ethanol is the main component of alcohol. Both are highly polar organic solvents.
Different uses: methanol is not the main component of industrial alcohol but the impurities in it, commonly known as "wood essence", is a more commonly used mobile phase in high-performance liquid chromatography, and is also one of the well-known degreasing agents. The most common applications are in organic synthesis, such as making Grignard reagents and so on.
Ethanol is the main ingredient in "liquor", not alcohol, because its common name is "alcohol".
Isopropanol is an important chemical product and raw material. It is mainly used as a dehydrating agent and cleaning agent in the pharmaceutical, cosmetic, plastic, spice, coating and electronic industries.
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Anonymous users2024-02-07Methanol, CH3OH, and methanol are widely used as basic organic chemical feedstocks and high-quality fuels. It is mainly used in fine chemicals, plastics and other fields, and is used to manufacture formaldehyde, acetic acid, chloromethane, methyl ammonia, dimethyl sulfate and other organic products, and is also one of the important raw materials for pesticides and medicines. Methanol can be used as a new type of clean fuel after deep processing, and it can also be mixed with gasoline.
Ethanol C2H5OH, 1 fuel.
2 Organic solvents.
3. Chemical raw materials.
4 drinks. 5 Medical disinfectants.
6.This product can penetrate into the body of bacteria, and at a certain concentration, it can coagulate and denature the protein and kill bacteria. The most suitable sterilization concentration is 75%, because in the case of a concentration of 75%, ethanol is isotonic with bacterial endocytosis, which is conducive to uniform distribution and sterilization, and at high concentrations (such as 95%), due to the rapid dehydration of the bacterial surface by ethanol, a protective film will be formed, which is not conducive to complete sterilization.
Because it cannot kill spores and viruses, it cannot be directly used for disinfection of surgical instruments. 50% dilute alcohol can be used to prevent bedding, and 25% 30% dilute alcohol can be used in scrub baths for patients with high fever to bring down body temperature.
Isopropanol C3H8O, a reagent for the determination of barium, calcium, magnesium, nickel, potassium, sodium and strontium. Chromatographic analysis of reference materials. For the electronics industry. Solvent.
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Anonymous users2024-02-06Isopropanol effects:
1. It has a wide range of uses as organic raw materials and solvents. As a chemical raw material, it can produce acetone, hydrogen peroxide, methyl isobutyl ketone, diisobutyl ketone, isopropylamine, isopropyl ether, isopropyl alcohol ether, isopropyl chloride, as well as isopropyl ester of fatty acids and isopropyl ester of chlorinated fatty acids. In terms of fine chemicals, it can be used to produce isopropyl nitrate, isopropyl xanthate, triisopropyl phosphite, aluminum triisopropanol, as well as pharmaceuticals and pesticides.
As a solvent, it can be used in the production of coatings, inks, extractants, aerosols, etc. It can also be used as antifreeze, detergent, additive for blending gasoline, dispersant for pigment production, fixative for printing and dyeing industry, anti-fogging agent for glass and transparent plastics, etc. It is used as a diluent for adhesives, and is also used in antifreeze, dehydrating agent, etc.
2. Reagents for the determination of barium, calcium, copper, magnesium, nickel, potassium, sodium, strontium, nitrite acid, cobalt, etc. Chromatographic analysis standards. As a chemical raw material, it can produce acetone, hydrogen peroxide, methyl isobutyl ketone, diisobutyl ketone, isopropylamine, isopropyl ether, isopropyl alcohol ether, isopropyl chloride, as well as isopropyl ester of fatty acids and isopropyl ester of chlorinated fatty acids.
In terms of fine chemicals, it can be used to produce isopropyl nitrate, isopropyl xanthate, triisopropyl phosphite, aluminum triisopropanol, as well as pharmaceuticals and pesticides. As a solvent, it can be used in the production of coatings, inks, extractants, aerosols, etc. It can also be used as antifreeze, detergent, additive for blending gasoline, dispersant for pigment production, fixative for printing and dyeing industry, anti-fogging agent for glass and transparent plastics, etc.
3. Used as a defoamer for water-based fracturing fluid in oil wells, the air forms a first-class mixture, which causes combustion in case of open flame and high heat energy. It can react strongly with oxidants. Its vapor is heavier than air, and can diffuse to a considerable distance at a low place, causing it to reignite when exposed to an ignition source.
In case of high heat, the internal pressure of the container increases, and there is a risk of cracking and **.
4. Isopropanol is used as a cleaning and degreasing agent, MOS grade is mainly used for discrete devices and medium and large-scale integrated circuits, and BV- grade is mainly used for VLSI process.
5. It is used in the electronics industry and can be used as a cleaning and degreasing agent.
6. Used as a diluent for adhesives, an extractant for cottonseed oil, and a solvent for nitrocellulose, rubber, coatings, shellac, alkaloids, oils, etc. It is also used in antifreeze, dehydrating agent, preservative, anti-fogging agent, medicine, pesticide, spice, cosmetics and organic synthesis.
7. It is a relatively cheap solvent in industry, with a wide range of uses, can be freely mixed with water, and has a stronger solubility than ethanol for lipophilic substances.
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