How much alcohol should a hand sanitizer have?
An effective hand sanitizer contains at least 60% ethanol or at least 70% isopropyl alcohol by volume. The two WHO-recommended formulations use 80% ethanol or 75% isopropyl alcohol. More than about 95% is not better, because a little water helps alcohol kill germs and stops it from evaporating before it has worked.
Last reviewed by the SANITIZER.PK team
Quick answer
- Minimum: 60% ethanol or 70% isopropyl alcohol by volume (v/v).
- WHO formulations: 80% v/v ethanol, or 75% v/v isopropyl alcohol, with glycerol and hydrogen peroxide.
- Too strong is not better: pure alcohol evaporates too fast and works less well than alcohol with some water.
- Methanol is toxic and must never be in a hand sanitizer.
Ethanol or isopropyl alcohol: which is better?
| Ethanol (ethyl alcohol) | Isopropyl alcohol (isopropanol) | |
|---|---|---|
| Minimum effective level | 60% v/v | 70% v/v |
| WHO formulation | 80% v/v | 75% v/v |
| Smell | Mild | Sharper, medicinal |
| Skin feel | Generally gentler | Can feel more drying |
| Notes | Most common in hand sanitizers | Common in clinical and surface products |
Why does a percentage on the label matter?
Alcohol is the expensive ingredient, so it is the one most likely to be reduced in a cheap or counterfeit product. A sanitizer that only says "contains alcohol" or "kills 99.9% of germs" without a percentage gives you no way to check. Under Pakistan's PS 5453 standard, PSQCA requires the contents to be labelled with their percentages.
Why is 99% alcohol not better?
Alcohol kills germs by breaking down their proteins and outer membranes, and that process needs some water. Very strong alcohol also evaporates in a few seconds, before it has had time to work. That is why effective sanitizers sit roughly between 60% and 95%, and the WHO formulas at 75 to 80%.
What do v/v and w/w mean?
v/v means volume of alcohol per volume of product. w/w means weight per weight. Because alcohol is lighter than water, the same product shows a lower number in w/w than in v/v. For example, 70% w/w ethanol is roughly 77% v/v. When comparing products, compare like with like.
Ingredients that should never be there
- Methanol (methyl alcohol, "wood alcohol"): toxic when absorbed through the skin and potentially fatal if swallowed. Health regulators have recalled hand sanitizers found to contain it.
- 1-propanol (n-propanol) in a product labelled as ethanol-based: a sign of contamination or substitution.
- Any sanitizer with a strong unfamiliar smell, cloudy liquid when it should be clear, or no ingredient list at all.
What about alcohol-free sanitizers?
Alcohol-free products usually rely on ingredients such as benzalkonium chloride. They are not covered by Pakistan's PS 5453 standard, which applies to alcohol-based sanitizers, and health agencies generally recommend alcohol-based products for hand hygiene. If you choose an alcohol-free product, check what evidence the manufacturer provides.
Sources and standards referred to
- World Health Organization, Guide to Local Production: WHO-recommended Handrub Formulations.
- US Centers for Disease Control and Prevention (CDC), guidance on hand sanitizer use.
- US Food and Drug Administration (FDA), consumer warnings on methanol-contaminated hand sanitizers.
- Pakistan Standards and Quality Control Authority (PSQCA), PS 5453/2020 Pakistan Standard for Hand Sanitizer and Disinfectants.
This guide is general information about hygiene products, not medical advice. For a health condition, speak to a doctor or pharmacist.
Frequently asked questions
Is 70% alcohol sanitizer good?
Yes. 70% ethanol or 70% isopropyl alcohol by volume is effective. 70% is above the 60% minimum for ethanol and meets the 70% minimum for isopropyl alcohol.
Is 62% alcohol enough?
62% ethanol is above the 60% minimum recommended by US health agencies. It must be ethanol; isopropyl alcohol needs at least 70%.
Can I make sanitizer at home from rubbing alcohol?
Home mixing often ends up too weak, and the WHO formula is meant for trained producers measuring alcohol strength. Buying a labelled product is safer. Never use methanol or industrial spirit of unknown content.
Need supplies today?
Tell us what you need and where. We confirm stock, price and delivery time before anything is sent. Same-day delivery is available in Karachi, Lahore and Islamabad.