It is almost impossible to make 100% Pure ethanol because ethanol is an Azeotrope. Under any circumstances the steam that is used to distill the water, alcohol mixture will not contain more than 95% – 96% alcohol.The purest ethanol is anywhere from 99.5% ABV to just a few parts-per-million water.Ethanol is harmful by ingestion, inhalation or by skin absorption. Repeated contact can dry the skin resulting in the skin cracking, peeling and itching. Ethanol can depress the central nervous system, the eyes and upper respiratory tract (nose and throat).

What are the four types of ethanol : The different types of ethanol's are described below:

• Pure Ethanol: These products contain only ethyl alcohol and water with other intentionally added additives or components.
• Specially Denatured Alcohols (SDA):
• Completely Denatured Alcohols (CDA):
• Special Industrial Solvents (SIS):
• Reagent Alcohol:

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].

Can 100% alcohol be consumed : It is dangerous as 100% ethanol (commonly known as alcohol) kills biological cells by absorbing the water associated with them. Pure ethanol effectively dessicates cells as the equilibrium state of ethanol in the atmosphere is 95% ethanol and 5% water.

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%.

No, you should not drink 70% ethanol or any concentrated ethanol solution. Ethanol, also known as ethyl alcohol, is the type of alcohol found in alcoholic beverages, but consuming ethanol in high concentrations, such as 70% ethanol, is extremely dangerous and can be life-threatening.

Can you make 100% ethanol

This lets the toluene. Water to be boiled off azeotropically leaving behind 100 ethanol.Actually 100 percent ethanol means it contains only C2H5OH molecule.However it is usually not available because of two reasons.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.

Ethanol (75%) is a widely used medium-effect disinfectant. It has a good sterilizing effect on most bacteria and viruses, but it has no obvious sterilizing effect on bacterial spores (Xue 2010).

What is 100% alcohol used for : 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 is 70 ethanol used : 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].

Is 100% ethanol hazardous

Ingestion Toxic if swallowed. Short term overexposure can cause drunkenness, depression of the central nervous system, nausea, vomiting, diarrhea, liver damage, and death. Inhalation Toxic if inhaled, Upper respiratory tract irritation, drowsiness and dizziness may occur. Skin Toxic if absorbed through skin.

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.100 % ethanol would evaporate very rapidly and therefore would not be able to kill the bacteria. However, if it is 70% or 80% ethanol and 20% or 30% water, the ethanol would not evaporate very rapidly. Since the ethanol is not evaporating rapidly, it will enter the cell and denature proteins inside the cell.

Is 100% ethanol flammable : Pure ethanol has a flash point of only 55 degrees F. Add 15 percent water and the flashpoint rises to 68 degrees F. Ethanol is still flammable mixed with water. That means that if you had a spill involving a 100,000 gallon tanker you could dilute it with as much as 900,000 gallons of water and still have a fire hazard.