Can You Use Isopropyl Alcohol on Skin?

In today’s world, hygiene is more important than ever, and many of us rely on quick solutions, such as alcohol-based cleansers, to disinfect our hands and surfaces. But a common question arises, ‘Can isopropyl alcohol be used on the skin as rubbing alcohol? ’ Let’s break down the science, considerations, and why choosing the right product, such as Chear Beauty’s Liquid Hand Cleanser with Alcohol, makes all the difference for your skin.

What is Isopropyl Alcohol?

Isopropyl alcohol (IPA), also known as 2-propanol or isopropanol, is a type of alcohol commonly used for disinfecting and sanitising. With the chemical formula of C₃H₈O, it is a colourless, volatile liquid with a strong odour, widely available in concentrations ranging from 60% to 99% for commercial applications.

It is frequently used as:

1. An antiseptic
2. A surface disinfectant
3. A solvent in household and cosmetic products
4. A component in hand sanitisers

In medical and beauty circles, the terms isopropyl alcohol and rubbing alcohol are often used interchangeably, but it’s essential to understand their distinctions.

Is Rubbing Alcohol the Same as Isopropyl Alcohol?

While rubbing alcohol typically contains isopropyl alcohol, it is usually diluted with water and may include other ingredients, such as denaturants or moisturisers.

In most over-the-counter formulations:

1. Rubbing alcohol = around 70% isopropyl alcohol + water + additives.
2. Pure isopropyl alcohol = 99% concentration (undiluted).

According to the UK National Health Service (NHS) and Public Health England, alcohol-based hand rubs containing 60–80% isopropyl or ethyl alcohol are effective at killing most viruses and bacteria on the skin【source: NHS.uk】.

Can You Safely Use Isopropyl Alcohol on Skin?

Yes, but with limitations.

While isopropyl alcohol is an effective antiseptic, applying it directly to your skin in high concentrations (especially 90% or above) can cause dryness, irritation, and damage to the skin barrier. It strips the skin of natural oils, leading to cracking and increased susceptibility to infection.

The Centres for Disease Control and Prevention (CDC) and World Health Organisation (WHO) both recommend using sanitising products with 60–70% alcohol concentration for skin-safe applications【source: who.int】【source: cdc.gov】.

Ideal Use for Skin:

1. Spot disinfection (e.g., before injections)
2. Hand sanitising (in gel or liquid form with proper dilution)
3. Surface sanitation (but not recommended for prolonged skin contact)

Therefore, isopropyl alcohol can be used as rubbing alcohol on the skin when it is properly diluted, preferably in formulations designed for topical application, such as hand cleansers or sanitisers.

Why 70% Isopropyl Alcohol is More Effective Than 99%

It may sound counterintuitive, but 70% isopropyl alcohol is more effective at killing bacteria and viruses than higher concentrations like 99%.

Here’s why:

1. The presence of water facilitates the penetration of alcohol into microbial cell walls, enabling more effective denaturation of proteins.
2. 99% IPA evaporates too quickly, reducing its contact time with microbes.A 
3. 70% solution allows for slower evaporation and longer action.

According to research published in the Journal of Hospital Infection and the UK government guidance on disinfection in healthcare settings, the 70% concentration hits the sweet spot between effectiveness and safety【source: gov.uk】【source: sciencedirect.com】.