Lena Savoie
Hand sanitizers have become increasingly popular since the COVID-19 pandemic, with many people using them as an alternative to handwashing with soap and water. While handwashing is often considered more effective, hand sanitizers are a convenient option when access to soap and water is limited. To be effective, hand sanitizers should contain a minimum of 60% alcohol, as recommended by the CDC and other health organizations. This concentration is sufficient to kill most germs and bacteria, making it an important component of hand sanitizers.
| Characteristics | Values |
|---|---|
| Minimum alcohol content | 60% |
| Maximum alcohol content | 95% |
| Active ingredient | Alcohol |
| Acceptable types of alcohol | Ethanol (ethyl alcohol), isopropyl alcohol (2-propanol) |
| Effectiveness | Kills most germs, but not all |
| Safety | Safe when used as directed, but can cause alcohol poisoning if swallowed |
| Disposal | Should not be disposed of down the drain or in the trash |
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What You'll Learn
- The CDC recommends hand sanitizers with at least 60% alcohol
- Alcohol-based hand sanitizers are safe but can cause alcohol poisoning if swallowed
- Alcohol-based hand sanitizers are ignitable hazardous waste
- Ethyl alcohol (ethanol) and isopropyl alcohol are acceptable alcohols in hand sanitizers
- Alcohol denatures proteins, destroying bacteria and viruses
The CDC recommends hand sanitizers with at least 60% alcohol
The CDC recommends using hand sanitizers with at least 60% alcohol to effectively kill germs. While handwashing with soap and water is always preferable, as it reduces all types of germs and chemicals on hands, hand sanitizers are a good alternative when soap and water are not available.
The alcohol in hand sanitizers, typically ethanol or ethyl alcohol, works by denaturing proteins, tearing them apart. This process destroys bacterial and viral membranes when the sanitizer is applied to the hands, but it is not strong enough to damage the skin. However, it is important to note that hand sanitizers may not work well on hands that are heavily soiled or greasy, and they are less effective at removing certain types of germs, such as Cryptosporidium, norovirus, and Clostridium difficile.
The recommended minimum alcohol percentage in hand sanitizers is supported by multiple studies, which have found that sanitizers with an alcohol concentration between 60-95% are significantly more effective at killing germs than those with a lower concentration. Hand sanitizers with lower alcohol concentrations may not work equally well for many types of germs and may only reduce the growth of germs rather than killing them outright.
It is also important to use hand sanitizers correctly. The CDC advises covering all surfaces of the hands with the sanitizer and allowing it to dry without wiping it off, as this may reduce its effectiveness. Additionally, hand sanitizers should be kept out of the reach of young children, as they may be at risk of swallowing the product, which can cause alcohol poisoning.
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Alcohol-based hand sanitizers are safe but can cause alcohol poisoning if swallowed
Alcohol-based hand sanitizers are a convenient way to keep your hands clean and reduce the spread of germs when soap and water are not available. They are generally safe to use and can effectively reduce the number of microbes on your hands. However, it is important to remember that hand sanitizers are not meant to be ingested and can cause serious health risks if swallowed.
The active ingredient in hand sanitizers is alcohol, which denatures proteins and destroys viruses and bacteria. To be effective, hand sanitizers should contain at least 60% alcohol, with some recommendations specifying a range of 60%-95% alcohol concentration. This high alcohol content makes hand sanitizers attractive to children, who may be tempted to swallow them. Ingesting even a small amount of hand sanitizer can be dangerous and lead to alcohol poisoning.
From 2011 to 2015, U.S. poison control centers received nearly 85,000 calls about hand sanitizer exposures among children. The colorful packaging and pleasant scents of some hand sanitizers can make them particularly enticing to young children. It is crucial to keep hand sanitizers out of the reach of children and to supervise their use.
In addition to the risk of accidental ingestion by children, there have been cases of adults intentionally swallowing alcohol-based hand sanitizers. During the COVID-19 pandemic, there were reports of adults ingesting hand sanitizers as a substitute for alcohol (ethanol). This practice can have severe consequences, including seizures, impaired vision, and even death.
To ensure the safe use of hand sanitizers, it is important to follow the recommended guidelines. Always read the label and choose hand sanitizers that contain at least 60% alcohol. Apply a sufficient amount to cover all surfaces of your hands and rub thoroughly until your hands are dry. Additionally, it is important to store hand sanitizers securely and keep them out of the reach of children.
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Alcohol-based hand sanitizers are ignitable hazardous waste
Alcohol-based hand sanitizers are highly effective at killing germs and bacteria. However, they are also flammable and pose a fire risk, especially when disposed of improperly. Due to their elevated alcohol content, typically containing at least 60% alcohol by volume, hand sanitizers are ignitable and fall under the classification of hazardous waste.
The Environmental Protection Agency (EPA) in the United States considers excess alcohol-based hand sanitizer as ignitable hazardous waste under the Resource Conservation and Recovery Act (RCRA). This classification is due to the sanitizer's potential for combustion when concentrated at high levels. For example, pouring a large quantity of alcohol-based sanitizer down the drain could result in flammable vapors in the municipal waste system. Similarly, disposing of expired hand sanitizer in a dumpster could lead to a fire.
The proper disposal of alcohol-based hand sanitizers is crucial to mitigate these risks. Improper disposal can lead to environmental hazards, fines, and compliance issues. The EPA recommends recycling excess hand sanitizer whenever possible, and several recycling methods are permitted under RCRA regulations. Businesses can partner with certified facilities to reclaim the alcohol in sanitizers and repurpose it as fuel or fuel additives. Alternatively, if the sanitizer meets FDA and safety standards, it can be donated or repurposed.
For households with expired hand sanitizer, it is important to avoid throwing it in the trash or pouring it down the drain. Instead, expired bottles can be taken to local household hazardous waste drop-off locations for safe disposal. By following proper disposal guidelines, individuals and businesses can ensure they are protecting the environment and complying with regulations.
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Ethyl alcohol (ethanol) and isopropyl alcohol are acceptable alcohols in hand sanitizers
The CDC recommends washing hands with soap and water whenever possible because handwashing reduces the amounts of all types of germs and chemicals on hands. However, if soap and water are unavailable, the CDC suggests using a hand sanitizer with at least 60% alcohol to avoid getting sick and prevent the spread of germs to others. Alcohol-based hand sanitizers can quickly reduce the number of microbes on hands, but they do not eliminate all types of germs. For instance, soap and water are more effective at removing certain germs, such as Cryptosporidium, norovirus, and Clostridium difficile.
Ethyl alcohol (ethanol)-based hand sanitizers are safe when used as directed. However, they can cause alcohol poisoning if ingested in larger amounts. From 2011 to 2015, U.S. poison control centers received approximately 85,000 calls about hand sanitizer exposures among children. Therefore, hand sanitizers should be kept out of the reach of young children and used under adult supervision.
According to the FDA, only ethanol (ethyl alcohol) and isopropyl alcohol (2-propanol) are acceptable alcohols in hand sanitizer. Medical-grade ethanol, which contains 95% ethyl alcohol, can be used for hand sanitizer production. It meets FDA requirements, does not contain methanol, and has no fermentation smell.
Isopropyl alcohol, also known as isopropanol or 2-propanol, is another type of alcohol that is often used in hand sanitizers. It is a clear, colourless liquid with a strong odour and is quickly absorbed by the skin. Isopropyl alcohol is effective at killing bacteria and viruses, making it a common ingredient in hand sanitizers, especially during the COVID-19 pandemic when the demand for hand sanitizers surged.
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Alcohol denatures proteins, destroying bacteria and viruses
Alcohol-based hand sanitizers are recommended as an alternative to soap and water, with a minimum alcohol concentration of 60%. The CDC and FDA also recommend this percentage as the minimum standard for commercial hand sanitizers.
The active ingredient in hand sanitizer is alcohol, which denatures or breaks apart proteins. When applied to the hands, alcohol does not shred through the skin, but it does destroy viruses and bacteria by breaking apart their proteins, splitting the cells into pieces, or messing with the cell's metabolism.
Ethanol molecules have both polar (hydrophilic) and non-polar (hydrophobic) ends, allowing them to break up the envelope and deactivate the virus. This is why ethanol is often used as the alcohol in hand sanitizers. Other types of alcohol used include isopropanol and isopropyl alcohol.
The optimal concentration level for alcohol in hand sanitizer is 60% to 90%, as this ensures the gel consistency is maintained and allows the alcohol enough time to destroy the virus envelope before drying. A concentration of 70% alcohol is often considered most effective, as a lower percentage may not clean hands sufficiently, and a higher percentage dries too quickly.
Alcohol has been used as an antiseptic for centuries, with records of Greek physicist Galen using wine to clean the wounds of gladiators in 150 BC.
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Frequently asked questions
The CDC recommends using hand sanitizer with at least 60% alcohol to prevent the spread of germs.
Studies have shown that sanitizers with an alcohol concentration between 60-95% are more effective at killing germs than those with a lower alcohol concentration. Hand sanitizers with lower alcohol content may not work equally well for many types of germs and may merely reduce the growth of germs rather than kill them.
According to the FDA, only ethanol (ethyl alcohol) and isopropyl alcohol (2-propanol) are acceptable alcohols in hand sanitizer.
Alcohol-free hand sanitizers may be FDA-approved and gentler on the skin, but they are not part of the official CDC guidance for COVID-19 and are not typically recommended by experts.
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