95% reagent ethanol is mainly used as analytical solvent. It is also used as disinfectant in many lab applications when diluted to 70%. Note: AR: Analitycal Reagent Grade: Reagents for analytical purpose or research work that need high purity.Alcohol intoxication results in CNS depression by enhancing the effect of GABA, an inhibitory neurotransmitter, on its receptors. It also inhibits the actions of 'glutamate' on the NMDA receptors, resulting in an incautious and dull state of mind.Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria.

Why use 95 ethanol instead of 100 : Denatured ethanol (either 95% or absolute) contains additives (such as methanol and isopropanol) that render it unsafe to drink and therefore exempt from certain beverage taxes. This makes it cheaper than pure ethanol. Of all the ethanol grades, this is the one you're most likely to use for disinfection in your lab.

What is the mechanism of action of 70% alcohol

70% IPA solutions penetrate the cell wall more completely which permeates the entire cell, coagulates all proteins, and therefore the microorganism dies. Extra water content slows evaporation, therefore increasing surface contact time and enhancing effectiveness.

What type of alcohol is used for consumption : ethanol

Ethyl alcohol or ethanol is the chemical name of the essence found in all alcoholic beverages. It is the only type of alcohol that is safe for consumption.

Stronger Isn't Always Better

It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria. The disinfecting power of rubbing alcohol drops at concentrations higher than 80%-85%.

Therefore, the ethanol has to pass the bacterial membrane/wall to get into the bacteria – if you use 100% ethanol instead, the bacteria get 'sealed' and they will survive… Another mechanism is the high osmotic pressure of ethanol/water-mixtures; and the 70% has the highest one.

Why is 70% ethanol used not 100%

At a 70% concentration, however, the ethanol takes longer to evaporate and this longer contact time means that it is able to penetrate cells more effectively. The water in a 70% grade is also important in denaturing proteins. And 70% ethanol also tends to be cheaper and is less flammable [1].Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria.70% denatured alcohol penetrate the cell wall more completely which permeates the entire cell, coagulates all proteins, and therefore the microorganism dies. Extra water content slows evaporation, therefore increasing surface contact time and enhancing effectiveness.

Surface disinfectant.

You can use alcohol as a disinfectant for items like scissors, thermometers, and other surfaces. However, alcohol isn't always reliable enough as a hospital-grade disinfectant. It can also damage the protective coating on some items, such as plastic tiles or glasses lenses.

Why don’t we use 100% alcohol : If we use 100% alcohol it will evaporate quickly so the time required for alcohol to show its effect will be reduced, similarly for diluted one the contact time will be increased but the minimum toxic concentration which is required for cell death will not be achieved. hence at 70% we get the best results.

Why is 70 ethanol better than 95 : Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria. The disinfecting power of rubbing alcohol drops at concentrations higher than 80%-85%.

Why is 70% ethanol more effective than 95%

You can buy rubbing alcohol with a concentration of 70% or 99% isopropyl alcohol. Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria.

100% (pure) alcohol has a high rate of evaporation. Thus, it will only dehydrate the cell; it will not denature the proteins. This is why 95% alcohol is a better disinfectant than absolute alcohol. This is a chemical method of microbial control.Even though you may think the higher concentration is more effective, experts say 70% is actually better for disinfecting. It has more water, which helps it to dissolve more slowly, penetrate cells, and kill bacteria.

What is 90% alcohol used for : Using a 90 percent or greater rubbing alcohol can make for a quickly evaporating cleaner for your electronics. Use an alcohol-soaked cotton swab or damp alcohol-soaked microfiber cloth to clean your computer's keyboard and mouse. Disinfecting mobile phone.