Everyone is talking about COVID-19 (coronavirus) at the moment. The beauty industry has postponed major conferences around the world and people are panic buying food, toilet paper and soaps in the supermarkets. You may also have noticed that the hand sanitiser shelves in your local stores are empty. Luckily we are formulators, so we can make our own! In this blog post, we’re going to show you how to make your own natural hand sanitiser.
Hand sanitisers generally come in the form of an alcohol-based gel. You use them by applying a coin-sized amount to the palm of one hand, rubbing your hands together covering the whole surface of your hands and fingers.
Disclaimer: this natural hand sanitiser blog will not provide adequate protection against a virus as a stand alone measure. The World Health Organization’s standard recommendations to prevent infection spread include regular hand washing, covering mouth and nose when coughing and sneezing, thoroughly cooking meat and eggs. Avoid close contact with anyone showing symptoms of respiratory illness such as coughing and sneezing.
How does a Natural Hand Sanitiser work?
Hand sanitisers work because they contain alcohol. The alcohol destroys the cells walls and membranes of bacterial cells and the envelope of viruses. If your natural hand sanitiser doesn’t contain alcohol, it may still kill bacteria but will be less effective against viruses. In other words, you need alcohol to make your natural hand sanitiser.
If a hand sanitiser contains over 60% alcohol, it can be effective at killing viruses and providing a degree of protection. However, if your hands are dirty, that will make harder for the sanitiser to be effective, so you need to pair your hand sanitiser with good hand washing. Make sure you wash your hands for at least 20 seconds – if you need an easy way of timing your hand wash, try to sing Happy Birthday at the same time!
Mainstream hand sanitisers also sometimes use chemicals such as chlorhexidine and benzalkonium chloride, but these chemicals would not be accepted in natural formulations.
The biggest struggle that you will face as a formulator is obtaining ethanol to use in your natural hand sanitiser. Ethanol is difficult to come by as you need to register with the authorities in your country to buy pure ethanol, which isn’t always achievable for indie formulators. An alternative option is isopropyl alcohol, which is not natural. You may read DIY blogs that tell you that you can use vodka, but keep in mind that vodka typically contains 40% alcohol, which would not be sufficient to kill or deactivate microorganisms.
20 Antiseptic Herbs for your Formulation
Once you start making your natural hand sanitiser, you may want to incorporate various plant extracts to provide additional antiseptic properties. Luckily, the plant kingdom is full of amazing herbs that contain active compounds such as phenolic compounds, tannins, terpenoids, alkaloids and flavonoids, which have been shown to have antimicrobial properties. Although these plants by themselves won’t be sufficient to make an effective natural hand sanitiser, they will however be able to give your sanitiser formulation an antimicrobial boost.
We’ve summarised 20 different antiseptic herbs and their active compounds in this table.
|PLANTS WITH ANTISEPTIC PROPERTIES||ACTIVE COMPOUNDS|
|Dill (Anethum graveolens)||Essential oils, Phellandrene, limonene, anithofuran|
|Eucalyptus (Eucalyptus globulus)||Tannins, Polyphenols, Terpenoids|
|Garlic (Allium sativum)||Allicin, Ajoene, Sulfoxide sulfated Terpenoids|
|German Chamomile (Matricaria recutita)||Terpenoids, Flavonoids, Coumarins|
|Gotu kola (Centella asiatica)||Terpenoids, Asiaticoside|
|Greater burdock (Arctium lappa)||Polyacetylene, Tannins, Terpenoids|
|Mangosteen (Garcinia mangostana)||Xanthone derivatives, Mangostins|
|Neem (Azadirachta indica)||Triterpenes, Azadirachtin|
|Onion (Allium cepa)||Allicin|
|Peppermint (Mentha piperita)||Terpenoids, Menthol|
|Peppers (Capsicum annuum)||Capsaicin, Terpenoids|
|Roman Chamomile (Anthemis nobilis)||Terpenoids, Flavonoids, Coumarins|
|Rosemary (Rosmarinus officinalis)||Essential oils, Terpenoids|
|Sacred Fig (Ficus religiosa)||Tannins, Saponins, Flavonoids, Terpenoids|
|St. John’s Wort (Hypericum perforatum)||Anthraquinones, Hyperecin|
|Tarragon (Artemisia dracunculus)||Caffeic acids, Tannins, Terpenoids|
|Tea (Camellia sinensis)||Flavonoids, Catechin|
|Thyme (Thymus vulgaris)||Caffeic acid, Terpenoid Thymol, Phenolic alcohol,Tannins, Polyphenols, Flavones|
|Valerian (Valeriana officinalis)||Essential oils, Terpenoids|
|White willow (Salix alba)||Salicin, Tannins, Phenolic glucosides|
Reference: Khanam, S. & Asfar, Z. 2013. Herbal Disinfectants: A Review.
Make your own Natural Hand Sanitiser Gel
A natural formulation without alcohol
We’ve created two different formulations for you: the first does not contain alcohol, so you need to be aware that this will not be as effective as a natural hand sanitiser formulation based on alcohol. The second formulation is alcohol-based, which will be most effective.
|A||Aloe vera Juice 1:1||51.40%|
|A||Chelator – Dermofeel PA3||0.10%|
|C||Sweet Orange essential oil||0.20%|
|C||Eucalyptus essential oil||0.15%|
|C||Tea tree essential oil||0.10%|
Method of Manufacture
- Blend Phase A together in a beaker.
- Blend the glycerine and gums to make a slurry in a separate beaker (Phase B).
- While stirring Phase A, slowly and gradually add Phase B. Stir well. If you have a magnetic stirrer, that will work well.
- In a third beaker, weigh the essential oils and preservative. Add the Cocamidopropyl betaine which will act as a solubiliser.
- Transfer Phase C now to the gel.
- Adjust your formulation’s pH to 5.
- Transfer the gel into a bottle with a flip top.
- Konjac and xanthan gums work well together but you can use one or the other. In that case, you may need to rework the ratios.
- The surfactant (Cocamidopropyl betaine) helps with dispersion of the essential oils
- The formulation contains no added alcohol although witch hazel sometimes contains a small amount of alcohol, so bear this in mind. We used witch hazel with 14% alcohol content. For this reason, we kept the ingredient at 40%.
- The gums will not work with a high alcohol content (they will not create a gel).
- You can try using rosemary, tea tree, manuka, eucalyptus hydrosols too for their antiseptic properties.
Make your own Hand Sanitiser Spray
A semi-natural formulation with alcohol
|B||Sweet Orange essential oil||0.20%|
|B||Eucalyptus essential oil||0.15%|
|B||Tea tree essential oil||0.10%|
|C||Isopropyl Alcohol 99%||65.00%|
Method of Manufacture
- Blend your Phase A ingredients in a clean beaker.
- Prepare Phase B: Weigh out the essential oils and add the cocamidopropyl betaine. It will create a paste.
- Add the alcohol (Phase C) to Phase A and blend together well.
- Add the solubilised Phase B to the combined Phases A & C.
- Adjust the pH to 5.
- Transfer into a clean spray bottle.
- The surfactant will act as a solubiliser of your essential oils.
- If you cannot find 99% isopropyl alcohol, you can try to replace the alcohol and the water (together) with 70% isopropyl alcohol. The issue may be that the remaining 30% of this blend may not be just water but may also contain some other additives. Keep in mind that isopropyl alcohol is not natural.
- Using vodka instead of alcohol will not create an effective sanitiser due to its low alcohol content.
- You can try using lavender, rosemary, thyme, sage, manuka essential oils too for their antiseptic properties.
Disclaimer: in some parts of the world, hand sanitisers are viewed as pharmaceutical / medicinal products. The formulation provided in this blog post is for home-use only and has not been tested for efficacy.
- Compound Chem, 2020. Coronavirus: Do hand sanitisers protect against infections?
- Kalaivani et al., 2018. A Study on Evaluation and Effectiveness of Herbal Hand Sanitizer and its Anti Bacterial Activity
- Khanam, S. & Asfar, Z. 2013. Herbal Disinfectants: A Review