Hand Sanitizer for Dental and Medical Clinics: Alcohol vs Quat vs CHG
A clinic can end up with three different hand hygiene bottles on the same shelf: an alcohol gel by the door, an alcohol-free bottle bought during a shortage, and a surgical scrub bottle kept in the treatment room. Each has a different active, and each behaves differently on the hands.
Choosing between them is a procurement decision as much as an infection control one, because the label, the regulatory listing and the shelf life all differ from one active to the next.
What is the difference between alcohol, quat and CHG hand rubs?
The three actives work in different ways and at different speeds. That difference is the reason the products are not interchangeable, and it is the first thing a buyer should be able to explain to a clinician who asks why one bottle sits where it does.
| Active | How it acts | Speed at the point of use | Left on the skin | Typical clinic role |
|---|---|---|---|---|
| Alcohol (ethanol 60 to 95%, isopropanol 70%) | Denatures proteins in the microbial cell | Seconds | Little, it evaporates | The routine hand rub between patients |
| Quaternary ammonium (benzalkonium chloride) | Disrupts the cell membrane | Seconds | Some residual activity | Alcohol-free settings and defined tasks |
| Chlorhexidine gluconate (CHG) | Disrupts the membrane and binds to skin | Slower onset | Measurable residual activity | Surgical scrub, usually combined with alcohol |
Which active does Canadian guidance prefer for routine care?
Routine hand hygiene in a clinic means the step taken between patients when the hands are not visibly soiled, and that step is an alcohol-based hand rub. Public Health Ontario's hand hygiene material and the WHO guidelines both place soap and water first when hands are soiled, and alcohol-based hand rub first for the routine moment in between.
That ordering is worth stating plainly because it decides what a clinic keeps at volume. The high-use product is the alcohol-based one, and the dispensers that matter are the ones placed where staff actually pass.
Can a quat or CHG product replace an alcohol-based hand rub?
Not as the everyday product. Quats are sensitive to organic soil, and clinic hands are rarely free of it, which is why an alcohol-free rub is positioned around a task rather than around the whole day. CHG acts more slowly at the point of use and is usually formulated with alcohol for that reason.
Both chemistries still have a place. A clinic that has a documented reason to avoid alcohol can keep an alcohol-free product for staff who use it under a written routine. What it should not do is treat the three bottles as equivalents and expect the same result.
What does the comparison evidence actually show?
A controlled study compared three hand antisepsis protocols on ten volunteers: chloroxylenol 3%, benzalkonium chloride 1%, and ethyl alcohol 61% with 1% chlorhexidine gluconate. Colony counts were taken straight after the protocol and again at the end of suturing.
The alcohol plus CHG protocol produced the lowest counts on both readings, and the benzalkonium chloride protocol sat between the other two. The study is small, but it is the kind of head-to-head data a clinic can point to when someone argues that any bottle will do.
For the alcohol family, evidence of a different kind matters more: concentration. The WHO guidance and Canadian practice both sit in the range where alcohol is effective, which is why 60% ethanol and 70% isopropanol are the numbers that appear on labels rather than a higher figure.
What should a clinic check on the label?
In Canada, a hand sanitizer is regulated as a drug and carries a product number on the label. That number is the field that tells a buyer the product has been accepted for sale as a hand sanitizer rather than as a general cleaner, and it is the first thing to copy into the supply file.
Two more labels matter. The first names the active and its concentration, because that is what makes two alcohol products comparable. The second carries the lot number and expiry date, which decide rotation on a multi-station site.
How should a clinic choose what to stock?
Start from the routine moment, not from the shelf. Keep an alcohol-based hand rub as the default at every patient-facing station, in a format sized to the traffic that station sees. Add a soap-and-water point where hands are soiled, and list any alcohol-free or CHG product against a specific written task.
A single-site clinic can standardise the routine product on the Aurelia hand sanitizer clinic pack of 12 by 60 mL and keep a 60 mL moisturizing hand sanitizer ten-pack for individual rooms. The hand sanitizer collection gathers the formats, and a touch-free sensor soap dispenser or the 1200 mL wall-mounted foam soap dispenser gives the soap-and-water point a format staff will actually use. The dental compliance hub collects the records a practice is asked to keep.
Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers.
References
- WHO Guidelines on Hand Hygiene in Health Care (checked 1 October 2026)
- Public Health Ontario, Hand hygiene (checked 1 October 2026)
- Surgical hand antisepsis: experimental study (PubMed Central) (checked 1 October 2026)
- Alcohol-free hand sanitizer and quaternary ammonium compounds (PubMed Central) (checked 1 October 2026)
Related Reading
- Alcohol-based vs waterless hand sanitizers: which for clinics?
- Hand sanitizer alcohol: why 60% ethanol and 70% isopropanol
- Foam vs gel hand sanitizer: which is more effective for clinics?
Frequently Asked Questions
What is the difference between alcohol, quat and CHG hand sanitizers?
They are three different active chemistries. Alcohol (ethanol or isopropanol) denatures proteins and acts within seconds. Quaternary ammonium compounds, usually benzalkonium chloride, disrupt the cell membrane. Chlorhexidine gluconate works more slowly but leaves measurable activity on the skin after it dries.
Which hand hygiene active does Canadian guidance prefer for routine care?
Alcohol-based hand rub is the routine product when hands are not visibly soiled. Public Health Ontario and the WHO guidance both treat soap and water as the choice when hands are soiled or after contact with a spore-forming organism, and alcohol-based hand rub as the everyday option between patients.
Can a quat or CHG product replace an alcohol-based hand rub?
Not as the routine product. Quats are inactivated by organic soil, which is exactly what clinic hands carry, and CHG is slower at the point of use. Both have defined roles, but neither is the default between patients.
What does the evidence show when the three are compared head to head?
In a controlled trial of ten volunteers, hands were sampled after three protocols: chloroxylenol 3%, benzalkonium chloride 1%, and ethyl alcohol 61% with 1% chlorhexidine gluconate. Colony counts after the alcohol-plus-CHG protocol were the lowest of the three, both immediately and at the end of suturing.
How should a clinic choose what to stock?
Stock the alcohol-based hand rub as the routine product, size the dispensers to the traffic each station sees, and list any quat or CHG product against a specific written task rather than as a general substitute.
Last updated: September 2026. CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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