Behind our Hand Sanitizer
"Many reports are coming out stating that only alcohol-based hand sanitizers should be used to help stop the spread of bacteria and viruses. However, scientific research has now proven that using the compound benzalkonium chloride (BK) shows significant improved persistent antibacterial activity vs the comparator ethanol-based formulation. We have included some links below to help you make an informed decision."
- A statement from Beckers Healthcare
How effective are different hand sanitizer formulations for handwashing?
Written by Rachel Popa | February 19, 2019
Benzalkonium chloride hand sanitizer is more effective than ethanol-based hand sanitizer, according to research published in the American Journal of Infection Control.
The efficacy of benzalkonium chloride hand sanitizer and ethanol-based hand sanitizer was compared by measuring persistence of staphylococcus aureus four hours after application.
The key details to know:
1. Benzalkonium chloride hand sanitizer was associated with a reduction in colony-forming units at three different time points.
2. Ethanol hand sanitizer was significantly less effective.
3. Researchers concluded, "These results show a major improvement in persistent antibacterial activity for the benzalkonium chloride formulation compared to the comparator ethanol-based formulation."
Researchers sought to determine the persistence of antibacterial activity of hand sanitizers by comparing one with a non-alcohol-based formulation using benzalkonium chloride (BK) (0.12%) vs one with an ethanol-based formulation (63%) (comparator product). They used a technique modification prescribed in American Society for Testing and Materials protocol E2752-10 to measure the persistence of antibacterial activity against Staphylococcus aureus at up to 4 hours after application. Outcomes revealed a noticeable reduction in colony-forming units with the application of the test product (BK) at each of the three-time points tested (3.75-4.16-log10 reductions), while the comparator produced less than 1-log10 reduction over the same period. These results indicate that the BK formulation has significantly improved persistent antibacterial activity vs the comparator ethanol-based formulation. coronaviruscovid19.ca
Evaluation of a benzalkonium chloride hand sanitizer in reducing transient Staphylococcus aureus bacterial skin contamination in health care workers: The results showed a significant reduction in total bacterial colony counts of S aureus during the week of BZK use as compared with the week of 70% ethanol sanitizer use.
PDF study performed by the American Journal of Infection control also shares the benefits of using BK rather than an alcohol-based sanitizer: