1. Alcohol disinfectant
The most commonly used alcohol disinfectants are ethanol and isopropanol, which can coagulate proteins and cause the death of microorganisms. It is a medium-efficiency disinfectant that can kill bacterial reproduction and damage most lipophilic viruses, such as herpes simplex virus, B Hepatitis virus, human immunodeficiency virus, etc.
Alcohol microbicide effect will be affected by organic matter, and because it is volatile, soak disinfection or repeated scrubbing should be used to ensure its action time. Alcohols are often used as solvents for certain disinfectants and have a synergistic effect. The usual concentration is 75%. According to foreign reports: 80% ethanol has an excellent inactivation effect on the virus. In recent years, there are many compound alcohol disinfectants at home and abroad, these products are mostly used for hand skin disinfection.
2. Physical and chemical properties
Alcohol is also ethanol. The concentration of medical ethanol is not less than 94.58%W/ml. It is a colorless and transparent liquid. It is volatile, has a spicy taste, is easy to burn, and can be mixed with water in any proportion.
Denatured alcohol adds toxic substances to ethanol, such as methanol, formaldehyde, mercury, etc. It is not drinkable, but it can be used for disinfection, and its role is the same as ethanol.
Isopropyl alcohol, a colorless, volatile liquid, is the isomer of n-propanol CH3-CH3-CH2-CH2OH. The concentration is not less than 98.5%. It is a colorless and bright flammable liquid. It has a smell similar to that of acetone and ethanol. It has a slightly bitter taste and can be mixed with water and ethanol.
3. How to use
75% ethanol solution is used for immersion, scrubbing and disinfection, mainly for hand skin disinfection.
70% isopropyl alcohol solution is used for soaking, scrubbing and disinfection.
4. Bactericidal effect
Ethanol has a killing effect on bacterial multiplications, viruses and fungal spores. Gram-positive bacteria are slightly more resistant than Gram-negative bacteria and are not effective against bacterial spores.
Isopropyl alcohol can kill bacterial reproduction, some viruses and fungal spores, but not bacterial spores.
5. Disinfection efficacy
Alcohol and isopropyl alcohol are commonly used medium-efficiency disinfectants. The difference in disinfection effect is not very large. If you really need a higher or lower level, isopropyl alcohol has better disinfection effect than alcohol, because the formal component of isopropyl alcohol is dimethyl Methanol, which contains two groups of methyl groups, greatly enhances its lipophilicity, which is attributed to the outstanding hydrophilic lipophilic amphoteric alcohols. Because of its strong permeability, its contact ability against bacteria and mold has also been enhanced accordingly. Alcohol generally refers to a 75% ethanol medical aqueous solution, which has a set of ethyl groups. The penetration of ethyl groups is weaker than that of methyl groups. It also causes the functional gap between the two to be further widened. The composition of many medical disinfection tablets on the market is actually Composed of 70% isopropyl alcohol and non-woven fabric.