ASTM E1174 and E2755: How Hand Hygiene Products Are Tested for Efficacy

ASTM E1174 and E2755: How Hand Hygiene Products Are Tested for Efficacy

Quick Summary: ASTM E1174 and ASTM E2755 are the two test methods behind efficacy claims on hand hygiene products. E1174 covers handwash formulations used with water; E2755 covers alcohol-based hand rubs applied to dry hands. Both measure how much the bacterial load on a volunteer's hands falls after use. This guide explains what the tests do, what the numbers mean, and what a busy clinic should still check for itself.

A long-term care unit switches hand sanitizer brands to save on refills. The new product has a label full of claims, and the purchase looks straightforward. Three weeks later the infection control lead is asked why the unit's hand hygiene audit scores have not moved. The product was never the bottleneck, but nobody had a way to talk about that until the efficacy question was separated from the compliance question.

Efficacy testing answers one narrow question well: under controlled conditions, how much does this formulation reduce bacteria on human hands? It does not answer whether staff use it, whether the dispensers are full, or whether the product is applied to dry hands rather than wet ones. Those are the questions that decide whether a facility's hand hygiene programme works, and they are precisely the questions a test method cannot reach.

Hand hygiene sits inside infection prevention guidance as a defined indication rather than a general good practice, both in Canadian public health material (Public Health Ontario) and in World Health Organization guidance used worldwide (WHO infection prevention and control). Occupational health guidance treats exposure risk in health care the same way, as a routine hazard with controls attached (CCOHS biological hazards).

How is hand hygiene efficacy actually measured?

The design of these tests is more interesting than the headline number. Volunteers have their hands contaminated with a known test organism under controlled conditions. A baseline sample is taken to establish how much is on the hands. The product is then used according to its instructions. A second sample is taken, and the two are compared (ASTM E1174).

Because the test runs on human hands, it has to handle the fact that people differ. A reference product is run alongside the test product so that both are measured under the same conditions, and the comparison is between products rather than between volunteers. That design choice is why the methods specify subject numbers and controlled application rather than simply asking a laboratory to count bacteria.

There is also a third method worth knowing. ASTM E2276 uses the fingerpads of adults rather than whole hands, which reduces the volume of product and the amount of contamination needed, and is useful when a formulation is scarce or when a narrower test is appropriate (ASTM E2276).

What is the difference between E1174 and E2755?

The two methods exist because hand washing and hand rubbing are different actions. E1174 evaluates handwash formulations: soap-based products used with water and rinsed off. E2755 evaluates hand rub formulations: products applied to dry hands, typically alcohol-based, that are not rinsed (ASTM E2755).

Reading the table as a hierarchy is a mistake. A clinic needs both categories, because the indications differ: visibly soiled hands are washed, and quick decontamination between patients is rubbed. The methods are separate because the products are separate, not because one is stronger.

What the numbers mean in practice

Efficacy results are usually reported as a log reduction. One log means the bacterial count fell by a factor of ten, two logs by a factor of one hundred. The number is a shorthand for a measured change, and it is far more useful than a phrase such as "kills most germs," which tells a buyer nothing they can compare.

Two practical consequences follow. First, a log reduction describes performance against the test organism under test conditions, not against every organism a clinic will meet. Second, it describes the formulation, not the practice. A product measured on carefully controlled hands says nothing about hands that are wet when the rub is applied, or hands that receive half the recommended volume.

Skin tolerance is part of the same picture, and there is a method for it as well: ASTM E1327 covers the evaluation of acute dermal irritation for antimicrobial handwash formulations (ASTM E1327). A product that leaves hands dry is a product that gets used less, and less use shows up in audit results long before it shows up in a lab report.

Which Canadian facilities should be checking this closely?

Any setting where hand hygiene is part of an infection control programme: dental practices, family medicine, long-term care, retirement communities, laboratories and veterinary clinics. In dental settings, hand hygiene and glove use are written into the same reprocessing and chairside expectations that cover instrument handling, which is why a change in product tends to arrive with a change in procedure (Public Health Ontario dental IPAC checklist).

Regulatory context matters here too. Hand sanitizers sold in Canada are regulated as natural health products and carry an NPN once authorised for sale, which is why the number appears on the label of compliant products. Medical devices, by contrast, sit under a different federal framework built on establishment registration (Health Canada medical devices). A clinic that buys both types of product should expect to see each in its own regulatory lane.

How should a facility choose between products?

Start from the indications rather than the claims. Decide how many wash stations and how many point-of-care rub stations the facility needs, then match the product format to the station: a wall-mounted dispenser at the point of care, a sealed refill system where refilling is a compliance risk, a foam format where consumption is high.

• Confirm the product carries an NPN and that the label number matches the listing.
• Check the format against the dispenser you already have, because a refill that does not fit becomes a decanted bottle on a shelf.
• Ask whether the product is intended for washing or rubbing, and place it where that indication applies.
• Watch consumption data for the first month, since usage is the fastest signal that placement or format is wrong.
• Keep the efficacy and irritation test references on file, so that a future review starts from evidence rather than from a brand conversation.

None of this requires a laboratory background. It requires treating the product choice and the placement decision as one decision, because in practice they are.

For Canadian facilities, CliniEco Medical supplies both sides of the hand hygiene programme: the DermaSeptyl 2-in-1 moisturizing hand sanitizer in 60 mL bottles for point-of-care placement, the 12-bottle clinic pack for facilities that restock by the tray, and the touch-free 1200 mL foam soap dispenser for wash stations. Teams also building a sterilization monitoring routine can start with the biological indicator 5-pack trial at CA $12.99 with shipping included. Facility and group purchasing enquiries go through the bulk quote request page.

References and standards cited

1. ASTM E1174, Standard Test Method for Evaluation of the Effectiveness of Health Care Personnel Handwash Formulations (link checked 19 September 2026)
2. ASTM E2755, Standard Test Method for Determining the Bacteria-Eliminating Effectiveness of Healthcare Personnel Hand Rub Formulations Using Hands of Adults (link checked 19 September 2026)
3. ASTM E2276, Standard Test Method for Determining the Bacteria-Eliminating Effectiveness of Hygienic Handwash and Handrub Agents Using the Fingerpads of Adults (link checked 19 September 2026)
4. ASTM E1327, Standard Test Method for Evaluation of Acute Dermal Irritation of Antimicrobial Handwash Formulations (link checked 19 September 2026)
5. Public Health Ontario, Infection prevention and control (link checked 19 September 2026)
6. Public Health Ontario, IPAC checklist for reprocessing in dental settings (PDF) (link checked 19 September 2026)
7. World Health Organization, Infection prevention and control fact sheet (link checked 19 September 2026)
8. OSHA, Bloodborne Pathogens standard (29 CFR 1910.1030) (link checked 19 September 2026)
9. Canadian Centre for Occupational Health and Safety, Biological hazards (link checked 19 September 2026)
10. Health Canada, Medical devices (federal device framework) (link checked 19 September 2026)

Related Reading

• Hand Sanitizer NPN Numbers: What 80122015 Means for Canadian Buyers
• NPN vs DIN: Hand Sanitizer Regulations in Canada
• Hand Sanitizer NPN Number 80122015: What It Means for Buyers
• Aurelia Hand Sanitizer — DermaSeptyl 2-in-1 Moisturizing, NPN 80122015, 10 × 60 mL
• Aurelia Hand Sanitizer Clinic Pack — 12 × 60 mL
• Touch-Free Foam Soap Dispenser — 1200 mL Wall-Mounted
• Wholesale and facility accounts

Frequently Asked Questions

Is ASTM E2755 the same as ASTM E1174?

No. E1174 evaluates handwash formulations, the products used with water that are washed off. E2755 evaluates alcohol-based hand rubs, applied to dry hands without water. The two methods use different application steps and different contamination models because the products work differently, so a result from one cannot be read as a result from the other.

What does a log reduction actually mean?

A log reduction is a way of expressing how much the bacterial population on the hands dropped. A one-log reduction means the count fell by a factor of ten; a two-log reduction means it fell by a factor of one hundred. Saying a product achieved a two-log reduction is more precise than saying it killed most of the bacteria, because it attaches a number to a measured change rather than an impression.

Why is a reference product used in these tests?

Skin carries a different microbial load from person to person and from day to day. Running a reference product alongside the test product lets the laboratory compare the two under the same conditions, which is how day-to-day variability in the human test subjects is controlled. Without that control, a difference between two products could simply reflect a difference between two groups of volunteers.

Does a high log reduction mean the product works in my clinic?

It means the formulation performed under laboratory conditions against a defined test organism on a defined number of subjects. Field performance also depends on how much product is used, how thoroughly the hands are covered, whether the product is applied to dry hands, and how often staff actually perform hand hygiene. A well-tested product used badly produces a worse result than the test suggests.

What is the difference between a hand wash and a hand rub?

A hand wash uses soap or a detergent-based formulation with water, mechanically lifting and rinsing material away. A hand rub is applied to dry hands and relies on the formulation itself. Both are legitimate, and most facilities use both. The test methods are split along the same line, which is why a facility comparing products should compare like with like.

How does a hand sanitizer get a number in Canada?

Hand sanitizers are regulated as natural health products in Canada and carry an NPN, a natural product number, once they are authorised for sale. The number appears on the label and is the fastest way to confirm that the product is inside the Canadian regulatory system rather than being sold as a general consumer item.

Should I check skin tolerance as well as efficacy?

Yes, and there is a test method for that too: ASTM E1327 covers the evaluation of acute dermal irritation for antimicrobial handwash formulations. A product that staff find drying tends to be used less or substituted with water rinses, so tolerance is an efficacy issue in practice rather than a comfort preference.

Do these tests replace monitoring in my facility?

No. A test result describes a formulation. Monitoring describes what happens in your building: whether dispensers are filled, whether staff reach for the product at the right moments, and whether the wards that need it most actually have it in reach. Both matter, and one cannot be inferred from the other.

Last updated: September 2026. CliniEco Medical is a licensed medical device establishment (MDEL #35334).