What is the Difference Between Rubbing Alcohol and Isopropyl Alcohol

Rubbing alcohol and isopropyl alcohol are two common terms that refer to alcohol-based antiseptic solutions used for various purposes. They are both used as disinfectants and cleaning agents. However, there is a distinct difference between rubbing alcohol and isopropyl alcohol.

What is the difference between rubbing alcohol and isopropyl alcohol? The concentration of isopropyl alcohol is 100%, whereas the concentration of rubbing alcohol is less because of the addition of water.

Key Areas Covered

1. What is Rubbing Alcohol  
      – Definition, Features 
2. What is Isopropyl Alcohol
      – Definition, Features 
3. Similarities Between Rubbing Alcohol and Isopropyl Alcohol
      – Outline of Common Features
4. Difference Between Rubbing Alcohol and Isopropyl Alcohol
      – Comparison of Key Differences
5. FAQ: Rubbing Alcohol and Isopropyl Alcohol
      – Answers to Frequently Asked Questions

Key Terms

Rubbing Alcohol, Isopropyl Alcohol

What is Isopropyl Alcohol

Isopropyl alcohol is a colorless, flammable organic compound with the molecular formula C₃H₈O. It has a pungent alcoholic odor. It can be synthesized by the reaction between propylene and sulfuric acid followed by hydrolysis. Isopropyl alcohol is mixed with water for use as rubbing alcohol. Moreover, it is easily oxidized to acetone, which is a solvent.

Isopropyl alcohol is considered as a good solvent. It has the ability to dissolve a variety of substances like oil, grease, and resins. This property is useful in cleaning tools and machinery, thinning paints, and removing nail polish. It is also used in the manufacture of antifreeze, cosmetics, and pharmaceuticals. In addition, it is useful in cleaning electronic components and circuits because of its fast evaporation rate. Its function as a disinfectant is another use of isopropyl alcohol. When it is a 70% solution with water, it is proven effective in killing germs and bacteria on surfaces.

Though there are many uses for isopropyl alcohol, it should be handled with care as it is an inflammable liquid which also can irritate the eyes and skin. Hence, it should be used in ventilated areas and kept away from sources of heat. It is also advised to store the compound out of reach of children and pets because it is not safe to drink.

What is Rubbing Alcohol

Rubbing alcohol is a readily available liquid, usually containing 70% isopropyl alcohol. Its main function is to serve as a disinfectant. The 70% solution is ideal for killing germs and bacteria on surfaces. It is also used to clean minor cuts and scrapes, prep injection sites, and disinfect countertops.

Beyond its disinfectant properties, it also acts as a good cleaning agent due to its solvent properties, which help remove stains like permanent marker stains. However, it should be tested on a separate area first as it can be slightly abrasive or drying on certain types of surfaces.

Rubbing alcohol’s fast-drying nature makes it perfect for electronics. A damp cotton swab dipped in rubbing alcohol can clean dust and grime from keyboards, phone screens, and other electronic surfaces (avoiding ports and sensitive areas).

Rubbing alcohol also has the potential to irritate skin and eyes and catch fire. Use it in well-ventilated areas, away from open flames. Due to its poisonous nature, if ingested, always store it securely and out of reach of children and pets. 

Similarities Between Rubbing Alcohol and Isopropyl Alcohol

1. Both isopropyl alcohol and rubbing alcohol are effective at killing germs and bacteria.
2. Both liquids act as solvents.
3. They are not safe for drinking.

Difference Between Rubbing Alcohol and Isopropyl Alcohol

Definition

• Isopropyl alcohol is a colorless, flammable organic compound with the molecular formula C₃H₈O, whereas rubbing alcohol is a readily available liquid usually containing 70% isopropyl alcohol.

Concentration

• Isopropyl alcohol comes in various concentrations, ranging from almost 100% pure to diluted solutions. Rubbing alcohol, on the other hand, is typically a pre-mixed solution containing around 70% isopropyl alcohol and 30% water.

Additives

• Pure isopropyl alcohol doesn’t contain any additives. Rubbing alcohol, however, sometimes includes extra ingredients like bittering agents to discourage accidental ingestion or scents for a more pleasant smell.

Evaporation

• Pure isopropyl alcohol evaporates faster than rubbing alcohol.

Density

• Isopropyl alcohol has a higher density than rubbing alcohol.

Conclusion

While both isopropyl alcohol and rubbing alcohol are effective disinfectants with solvent properties, there is a difference between rubbing alcohol and isopropyl alcohol in terms of concentration, composition, and specific uses. Isopropyl alcohol is typically found in various concentrations while rubbing alcohol is a pre-mixed solution containing 70% isopropyl alcohol and water.

FAQ: Rubbing Alcohol and Isopropyl Alcohol

1. Is rubbing alcohol 99% isopropyl?

You can buy rubbing alcohol with a concentration of 70% or 99% isopropyl alcohol.

2. Can you use 70% isopropyl alcohol to clean skin?

As a general rule, 70 percent rubbing alcohol is more friendly for use on your skin. Alcohol is a natural astringent that can help to tighten pores and leave your skin feeling refreshed.

3. Is isopropyl alcohol safe for human skin?

Frequent contact with isopropyl alcohol can cause skin issues such as a rash, itching, dryness, and redness. Inhaling isopropyl alcohol may irritate the nose and throat. Prolonged exposure at high levels can lead to headaches, dizziness, confusion, loss of coordination, unconsciousness, and even death in extreme cases.

4. How can glycerin benefit your skin?

Glycerin is great for the skin because it acts as a humectant, which is a substance that allows the skin to retain moisture.

5. Is it OK to use rubbing alcohol on armpits?

Rubbing alcohol can help kill odor-causing bacteria. A person can apply rubbing alcohol under the armpits to help eliminate body odors.

Reference:

1. “Isopropyl Alcohol.” Encyclopedia Britannica.
2. “Rubbing Alcohol Uses.” Web MD.

Image Courtesy:

1. “Isopropanol by Danny S” By Danny S. – Own work (CC BY-SA 3.0) via Commons Wikimedia
2. “Rubbing alcohol” By Craig Spurrier – Own work (CC BY 2.5) via Commons Wikimedia