How to prepare medical alcohol

So it can be used to make medical alcohol? Isn’t that too casual? I think there should be requirements as well for other toxic substances.

One thing is for sure: the control standards for anhydrous ethanol are definitely stricter than those for medical alcohol!

Anhydrous alcohol should be fine; there’s a 95% chance that the 95% version has an issue

Laboratory-grade analytical alcohol has absolutely higher requirements than medical alcohol, whether it is anhydrous alcohol or 95% alcohol!

It cannot be prepared using anhydrous alcohol from the laboratory, as the alcohol available there contains methanol and other higher molecular weight alcohols, all of which are harmful to the human body

95% food-grade alcohol available today can be used to produce medical alcohol, and the quality of such alcohol is very good. Its quality is controlled in terms of ppm levels. To convert 95% food-grade alcohol into anhydrous alcohol, distillation is not necessarily the only method used

Some people say it’s possible, while others say it’s not. Are there any authoritative reports or statements on this? Are there any differences in the preparation methods for the 95% for consumption and the 95% for laboratory use? Are there any documents that explain this in detail?

Is there edible alcohol with a concentration as high as 95%? I’ve heard of it for the first time!

Edible alcohol, so to speak, is produced through brewing; distillation technology can be used for this purpose. There are books on wine manufacturing and testing in the pinned post; take a look. Industrial alcohol is used in the laboratory, and the production process is different.

Does that mean I can’t use anhydrous ethanol or 95% ethanol from the laboratory to prepare 75% medical alcohol?

Additional note: The differences between industrial alcohol and medical alcohol. 1. The raw materials used and the production processes are different. Industrial alcohol is produced from raw coal or petroleum cracking, and it contains large amounts of impurities such as methanol and formaldehyde, which are difficult to separate out ； Medical and pharmaceutical alcohol is now produced by fermenting corn or other grains using glucoamylase, resulting in very few impurities. 2. Different uses. Industrial alcohol contains harmful substances to the human body such as methanol, and must never be consumed; it can only be used as a raw material in non-food industrial applications or as fuel ； At present, both medical and pharmaceutical alcohol are products that meet the standards for edible alcohol; there is no dedicated type of such alcohol, and it can be used in drug production or diluted to 75% concentration to serve as medical disinfectant alcohol.

I agree with the view above; many food and pharmaceutical products do not require high purity, but rather have strict requirements regarding trace harmful substances. Ethanol, which is used as a reagent, contains aldehydes, and when laboratories need aldehyde-free ethanol, it must be refined again. This post was last edited by flks224086 on 2009-4-1 19:49.]

Laboratory-grade analytical alcohol has absolutely higher requirements than medical alcohol, whether it is anhydrous alcohol or 95% alcohol!

Medical alcohol has a concentration of 75%; to prepare it using 95% medical alcohol (note: not industrial alcohol), the following formula can be used: 0.75*Volume A = 0.95*Volume B. Once the volume of Volume A required for preparation is determined, the amount of raw alcohol needed, That is, Volume B, can be calculated. The amount of sterile distilled water to be added is Volume A minus Volume B. When diluting alcohol, its volume is slightly less than the calculated value, but this effect is minimal.