Walking down the toiletries and disinfectants aisle of the store, you remember you need something. You see the alcohol section. Perfect! You were running out. But, wouldn’t you know it, you still have to decide between ethyl alcohol and isopropyl alcohol.
They are both alcohol. As you can see, each brand even offers both variations. Seeing them side to side, you might wonder which is more effective for you and your needs.
In this article, you’ll learn about the differences between ethyl and isopropyl alcohol. Though, let’s start with what ethyl or isopropyl alcohol is anyway?
Ethyl and Isopropyl Alcohol
You might already be familiar with ethyl or isopropyl alcohol. By randomly picking up a bottle, it’s always going to be either isopropyl or ethyl on the bottle. If you’re having trouble deciding, check the definitions below:
What is Ethyl Alcohol?
Ethyl alcohol is the alcohol that might already be in your liquor cabinet. Made from cereal and grains, it’s used in alcoholic beverages, like wine and beer. Though, don’t take out the whiskey to clean just yet.
The ethyl alcohol specifically for disinfecting is denatured. Alcohol is denatured by including additives so that it’s unfit for consumption anymore. They give ethanol a rather unpleasant taste, discouraging people from giving it a sip. It’s a good thing too, since drinking denatured ethyl alcohol will make you sick.
What is Isopropyl Alcohol?
Isopropyl alcohol is the alcohol commonly used in hand sanitizers, like methanol. It’s mixed in a lot of mass-produced disinfecting and cleaning products. It could also be found in aftershaves and other cosmetics. You can also use certain concentrations of this alcohol by itself as well.
As a rule, rubbing alcohol is unsafe to drink, much like ethyl alcohol once it’s denatured.
The Similarities Between Ethyl and Isopropyl Alcohol
After knowing about what ethyl or isopropyl alcohol is, you can see that they are alike in some ways already. Here are more of their similarities below:
- Both of these alcohols move similarly when breaking down bacteria.
- They are flammable and can evaporate quite easily.
- These two are colorless in nature and soluble in water.
- At room temperature, they do stay in liquid form.
- Ethyl or isopropyl alcohol can defeat most common bacteria like Staphylococcus Aureus, salmonella, and E. Coli.
- Other resistant bacteria they can protect you from are Staphylococcus aureus (MRSA) and Mycobacterium tuberculosis.
Ethyl or Isopropyl Alcohol?
Now that you’ve seen the definitions and similarities of both alcohols, it’s time to look over their differences. Hopefully, the following points will help you decide which is best for you and your family.
1. Chemical Structure
Isopropyl and ethyl alcohol are pretty similar, but they still show differences chemically. Their distinctions in chemical structures give you a deeper insight into how they work.
Denatured ethyl alcohol has the chemical formula of C2H6O. Due to its higher octane number, it’s commonly used in renewable gasoline. You can also call this type of alcohol by its other names, which are ethanol or grain alcohol.
Isopropyl alcohol is a bit different. Its chemical structure is C3H8O. As you can see, it has two more hydrogen atoms and one more carbon atom than ethyl alcohol. Other names for this particular alcohol are isopropanol, IPA, and just regular rubbing alcohol.
2. Physical Characteristics
Both variations of alcohol do look the same. You have to look at other aspects of each solution to know which works best in a given situation.
They do have some similarities, apart from their differences in melting points. The main difference between ethyl alcohol and isopropyl alcohol is whether or not you can drink them or not. Ethyl alcohol is the only one safe enough to drink. Granted that it didn’t go through the denaturing process yet.
In any form, you shouldn’t consume any amount of isopropyl alcohol. When it comes to a higher boiling and melting point, isopropyl alcohol takes the cake. Its scent is also a bit stronger than ethyl alcohol.
3. Contact Time on Skin
It’s safe to say that people have been using isopropyl and ethyl alcohol for a while now. You can see that it’s safe to use on the skin.
However, these alcohols do clash on their wet/contact time, or the time it takes for it to eliminate bacteria. A shorter wet time indicates that the disinfectant is more powerful because it can kill pathogens faster. Though, keep in mind, if it’s too fast, it won’t have enough time either.
Ethyl alcohol is shown to be the best bet for your skin in general. It promotes less skin damage, even when used frequently. It’s also a bit more viscous than isopropyl alcohol, making your skin dry up faster. It doesn’t necessarily give you the best feeling when it does that.
When it comes to unbroken skin, it’s best to use isopropyl alcohol. It’s safer since it’s less irritating on the skin in small amounts. If you do end up using a lot, the solution could make your skin itch, crack, and a little red.
Additionally, the slightly more-watery consistency of isopropyl alcohol. Because of this, the solution evaporates quickly on the skin.
4. Preferred Concentrations
For alcohols, certain concentrations have been proven to be the most effective. If the concentration is too low, it won’t be strong enough to do its job.
On the other hand, if the concentration is too high, it won’t be any good either. Instead of protecting your skin, it’ll end up protecting the germs themselves. For the best results, here are the preferred concentrations for either ethyl or isopropyl alcohol below:
Ethyl alcohol is more effective when in concentrations of at least 60% and above, as recommended by the CDC. With the best concentration possible, it can take out a variety of viruses covered in this lipid bilayer, or enveloped viruses.
While we do carry 99% ethanol, it’s mostly for industrial purposes. In this case, it’s not for personal everyday use. You won’t find them in regular first aid kits. It’s used mostly for sanitizing surfaces prior to application.
As for isopropyl alcohol, it’s best to have a 70% concentration, which we carry on our website. When the concentration goes to about 90%, the solution will give the bacteria a coagulated barrier. It’ll end up making the pathogens stronger and harder to kill.
5. Antimicrobial Capabilities
Now, for the meat of the debate. People buy ethyl or isopropyl alcohol as a disinfectant, after all. The following are the various pathogens each alcohol can protect you from. Let’s start with the tough-to-tackle viruses.
Ethyl alcohol, like what was stated in the previous point, is efficient against enveloped viruses. Well, it too can protect you from some nonenveloped viruses like:
- Adenovirus type 5
- Poliovirus type 1
- Murine norovirus
A 70% solution of ethyl alcohol has antifungal properties as well. It can eliminate fungi such as:
- Blastomyces dermatitidis
- Coccidiodes immitis
- Cryptococcus neoformans
- Histoplasma capsulatum
Much like ethyl alcohol, isopropyl alcohol can be used against enveloped viruses like the following:
- Herpes virus
- Hepatitis B virus
- Influenza virus
- Vaccinia virus
This alcohol does have a slight edge over ethyl alcohol with some bacteria. It’s a bit more effective against bacteria such as S. aureus and E. coli. Even a 20% solution of isopropyl alcohol can kill off Acanthamoeba culbertsoni.
How Does Alcohol Work as a Disinfectant and Antiseptic?
Ethyl and isopropyl alcohol can eliminate a variety of viruses and bacteria, based on a study conducted in 2020. Though, how they do that is quite fascinating.
It’s been recorded that ethyl and isopropyl alcohol do relatively the same thing. They clean up surfaces through the process of denaturation. These organic compounds disintegrate the lipids and proteins that make up most germs. In turn, these cells won’t be able to live for much longer.
Alternative Uses of Ethyl and Isopropyl Alcohol
Apart from disinfecting surfaces, you’ll be surprised about the diverse uses of both alcohols. Listed below are just a couple of the rather unique applications for ethyl and isopropyl alcohol. They are used for:
- Prepping skin for a tattoo or piercing
- Preparing cars for car wraps
- Cleaning electronics like contact pins
- Evaporating excess water from ears
- Detaching stubborn stickers and decals
- Being a quick-fix deodorant
- Sanitizing jewelry and makeup brushes
Either ethyl or isopropyl alcohol is a popular disinfectant. Both of them, actually. They break down bacteria in the same way. They’re soluble, colorless, flammable, and volatile. Even when they’re practically the same, appearance-wise, they do some things differently.
The difference in their chemical structures makes them used in other ways, like for aftershaves and gasoline. There are certain ethyl alcohols that you can drink. Before the denaturation process, they’re perfectly safe to consume. In terms of isopropyl alcohol, it’s dangerous in any form.
On your skin, each alcohol acts in its way. Ethyl alcohol won’t damage the skin that much if used often. Its viscosity makes it dry quicker though. If you want the safer option, isopropyl alcohol works well on unbroken sin.
For concentration measurements, it varies. Isopropyl alcohol is normally used at a 70% concentration. Ethyl alcohol concentrations should start at 60%. Each concentration is used for a specific range of germs, and even fungi.