Mason Delacroix
Hand sanitiser is an essential item for many people, especially in the wake of the COVID-19 pandemic. However, it does have an expiration date, usually around three years after the manufacturing date, and its effectiveness decreases over time due to the evaporation of alcohol. While it is generally not recommended to use hand sanitiser after its expiration date, some people may consider adding alcohol to expired hand sanitiser to extend its life. This practice is generally not recommended by the FDA, but in emergency situations when no other options are available, some sources suggest adding rubbing alcohol or isopropyl alcohol to expired hand sanitiser to increase its alcohol content and potentially enhance its effectiveness. However, it is important to note that hand washing with soap and water is still the most effective method for killing viruses and bacteria.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Adding alcohol to expired hand sanitizer | Declared by the FDA as something consumers should not do |
| Alternative | Wash hands with soap and water |
| Adding alcohol to expired hand sanitizer in emergency situations | Possible, but with isopropanol alcohol or ethanol alcohol/USP grade isopropyl alcohol |
| Alcohol concentration in hand sanitizers | Should be between 60% to 70% |
| Alcohol-free hand sanitizers | Contain antiseptic benzalkonium chloride, water, and other skin moisturizers |
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What You'll Learn
Check the viscosity of the expired hand sanitizer
When adding alcohol to expired hand sanitizer, it is important to check the viscosity of the product. Viscosity refers to the thickness or consistency of a liquid. Checking the viscosity of the hand sanitizer ensures that it will be effective in reducing bacteria and killing germs.
To check the viscosity, you can perform a simple test by placing a small amount of the hand sanitizer on a surface and observing its behaviour. If the hand sanitizer is too runny or liquid, it may need more thickening agent. Common thickening agents used in hand sanitizers include hydroxyethyl cellulose (HEC) and carbomer. HEC is a natural and biodegradable option that is gentle on the skin, while carbomer is synthetic and requires additional chemicals. By adding a small amount of thickening agent at a time and mixing thoroughly, you can adjust the viscosity of the hand sanitizer to the desired consistency.
Another way to assess viscosity is by using a tool called a viscometer, which measures the resistance of a fluid to flow. This tool can provide a more precise measurement of viscosity and help you determine if the hand sanitizer needs further adjustment.
It is important to note that the viscosity of hand sanitizer can affect its effectiveness. A study found that hand sanitizer with lower viscosity can cover a larger surface area, allowing it to kill more bacteria with less product. Therefore, finding the right viscosity is crucial for ensuring the effectiveness of your hand sanitizer.
Additionally, it is essential to consider the alcohol content in your hand sanitizer. According to the Centers for Disease Control and Prevention (CDC), hand sanitizer should contain at least 60% alcohol to be effective in reducing microbes. This proportion can be maintained by following a 2:1 ratio of alcohol to aloe vera when creating your own hand sanitizer. However, it is always recommended to opt for handwashing with soap and water whenever possible, as it is the most effective way to prevent the spread of infectious diseases.
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Choose the right type of alcohol
Adding alcohol to expired hand sanitiser is generally not recommended, and you should always check the instruction labels. However, in an emergency, it can be done. The type of alcohol you choose is important, as the wrong type could be ineffective or even dangerous.
The alcohol used must be of a similar concentration to the alcohol that is usually added to hand sanitiser. The FDA suggests using ethanol alcohol or USP grade isopropyl alcohol (also known as isopropanol alcohol or rubbing alcohol). Isopropyl alcohol can be used as long as it has a concentration of 60 to 70%. This concentration is important because, if the alcohol content is lower than 60%, it will be less effective at protecting against viruses and bacteria.
The FDA also states that you should not alter the concentration levels of the other ingredients in the hand sanitiser. Other ingredients that can be added include hydrogen peroxide, glycerin, and sterilised water.
It is also important to note that hand sanitiser should be disposed of correctly as it is flammable and could cause harm to wildlife if consumed.
Finally, it is always more effective to simply wash your hands with soap and water, as this will cover all portions of the skin, even within the crevices, breaking down viruses.
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![McKesson Premium Hand Sanitizer with Aloe, 34 oz [Pack of 1] Refill Bag Dispenser, Bulk, Ethyl Alcohol Gel, Vitamin E](https://m.media-amazon.com/images/I/61xp8P571bL._AC_UL320_.jpg)
Measure the alcohol concentration
It is important to measure the alcohol concentration of your hand sanitizer to ensure that it is effective at killing germs and viruses. The recommended alcohol concentration for hand sanitizers is at least 60%. Diluting the alcohol concentration below 60% may result in the spreading of germs, so it is important to measure the ingredients carefully when making your own hand sanitizer.
To measure the alcohol concentration of your hand sanitizer, you will need to use a measuring cup or a similar tool to ensure the correct ratios of alcohol and other ingredients. You can also use a hydrometer to verify the alcohol concentration if needed. It is also important to work in a clean space free from bacteria or contaminants to avoid affecting the accuracy of your measurements.
If you are experiencing skin irritation from using your hand sanitizer, you can try reducing the alcohol concentration slightly and increasing the amount of glycerin to moisturize your skin. However, be careful not to dilute the alcohol concentration too much, as this will reduce the effectiveness of the hand sanitizer.
Additionally, it is recommended to store your hand sanitizer in a cool, dark place to maintain its potency. Exposure to heat or sunlight can affect the alcohol concentration and reduce the effectiveness of the hand sanitizer over time.
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Add the alcohol
Adding alcohol to expired hand sanitiser is not recommended by the FDA. However, in emergency situations, some people choose to revitalise their expired hand sanitiser by adding more alcohol.
If you decide to add alcohol to your expired hand sanitiser, it is important to be cautious and informed. Firstly, check the viscosity of the expired hand sanitiser. If it is still thick, adding alcohol may not be necessary. If the consistency is too liquid, you may proceed with adding alcohol.
When adding alcohol, use either ethanol alcohol or USP grade isopropyl alcohol, as suggested by the FDA. The Canadian government recommends a concentration of 60 to 70% isopropyl alcohol. Ensure that you do not alter the concentration levels of other ingredients in the hand sanitiser.
It is also important to note that adding alcohol to expired hand sanitiser may not restore its effectiveness completely. The best way to ensure optimal hand hygiene is to wash your hands with soap and water, which is more effective than using hand sanitiser, even when it is within its expiry date.
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Wash hands with soap and water
While it is possible to add alcohol to expired hand sanitizer, washing your hands with soap and water is the best way to get rid of germs and ensure your hands are clean.
To wash your hands effectively, follow these steps:
- Wet your hands with clean, running water (warm or cold).
- Apply soap to your hands.
- Lather the soap by rubbing your hands together. Be sure to lather the backs of your hands, between your fingers, and under your nails.
- Scrub your hands for at least 20 seconds. You can hum the "Happy Birthday" song twice to ensure you are scrubbing for long enough.
- Rinse your hands well under clean, running water. Make sure all the soap is gone. A thorough rinse will remove all the germs, chemicals, and dirt from your hands.
- Dry your hands using a clean towel or an air dryer. It is best to use a paper towel or hand towel to dry your hands, as research shows that it is easier for germs to spread on wet hands.
Washing your hands with soap and water is a simple and effective way to keep yourself and others healthy. It is important to wash your hands many times throughout the day, especially before preparing food and after using the bathroom.
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Frequently asked questions
Hand sanitizer usually has an expiry date on the bottle, which is typically 3 years after the manufacturing date. If the expiry date has passed, the alcohol concentration may have reduced, making it less effective.
Alcohol is a volatile product and will evaporate over time, especially if the bottle is left uncapped. This reduces the effectiveness of the hand sanitizer.
The FDA recommends using ethanol alcohol or USP grade isopropyl alcohol. A Canadian government agency suggests that isopropyl alcohol concentration should be between 60-70%.
You can add hydrogen peroxide, glycerin, or sterilized water to your expired hand sanitizer. However, do not alter the concentration level of the other ingredients.
![McKesson Hand Sanitizer with Aloe, 18 oz Pump Bottle [Pack of 3] - 70% Ethyl Alcohol, Spring Water Scent, No-Rinse Sanitizing Gel with Vitamin E and Moisturizers, Medical-Grade](https://m.media-amazon.com/images/I/71r1uS+Ep5L._AC_UL320_.jpg)
