Ultrasonic cleaning solution is bought as a concentrate and paid for as a working bath, and the two numbers are rarely the same. In Ontario, clinics buy it from a dental distributor, a medical wholesaler, or a supplier that stocks the concentrate in Canada, and the price per bottle tells you almost nothing until you divide by the dilution ratio. A 4-litre concentrate at 1:200 makes roughly 800 litres of working solution; at 1:50 it makes 200. That single ratio changes the cost per litre by a factor of four.
The concentrate most clinics standardise on for instrument reprocessing is an 
enzymatic ultrasonic cleaning solution, 4 L concentrate. This guide covers where to buy in Ontario, how to work out cost per litre of bath, and what to check before switching brands.
Where do Ontario clinics buy ultrasonic cleaning solution?
Three routes, and the difference between them is mostly about how much stock you are willing to hold.
- Dental distributor. One or two bottles at a time, next-day delivery in most Ontario cities, and the highest cost per litre of working bath. Reasonable for a single-chair practice.
- Medical or laboratory wholesaler. Case quantities of four bottles or more, better unit pricing, and the concentrate arrives with a longer shelf life than a working bath would.
- Supplier with Canadian stock. The middle route: wholesale pricing without a container wait, provided the stock is held domestically rather than drop-shipped.
Ask the same question of all three: what is the dilution ratio on the label, and is it the ratio for manual immersion or for an ultrasonic bath. A product diluted for manual soaking may be specified differently for ultrasonic use, and using the manual ratio in a bath wastes concentrate or under-cleans.
How do you calculate cost per litre of working bath?
Divide the concentrate price by the working volume it produces, not by the bottle size.
| Input | Example | Note |
|---|---|---|
| Concentrate volume | 4 L | Bottle or carboy size |
| Dilution ratio | 1:200 | Read the label, do not assume |
| Working bath produced | 800 L | 4 L x 200 |
| Concentrate price | $60 | Example figure for the arithmetic |
| Cost per litre of bath | $0.075 | $60 / 800 L |
| Bath changes per week | 5 | One per working day, 6 L tank |
| Annual bath cost | About $117 | 5 x 6 L x 50 weeks x $0.075 |
The arithmetic is the whole point. A clinic comparing two concentrates by bottle price can pay twice as much per litre of bath while believing it saved money, because the cheaper bottle is diluted 1:50 and the other 1:200.
How often should the bath be changed?
Change the working solution when it becomes visibly soiled, when the cleaning performance drops, or at the interval the manufacturer specifies, whichever comes first. A busy clinic running ten loads a day usually changes daily; a small practice running two loads a day may stretch to every second day. The bath is not a storage container: solution that has been used repeatedly holds soil in suspension and redeposits it on the next load.
Record the change on the same log as the cycle parameters. When a cleaning failure is investigated later, the bath change record is what shows whether the solution was fresh.
What should you check before switching brands?
- Dilution ratio and whether it differs between manual and ultrasonic use.
- Material compatibility with the tank, basket and the instruments being cleaned. An alkaline solution can dull aluminium and damage anodised surfaces.
- Rinsing requirement. Some formulas need a specific rinse volume to avoid residue that later interferes with the sterilizer.
- Lot number and expiry on the concentrate, because an enzyme concentrate stored past its date loses activity.
Order one bottle, run it for two weeks on your usual load mix, and compare the inspection findings on hinges and lumens. Those are the places that show whether a cleaner is working, and they show it faster than any lab test.
Related reading
- Switching suppliers: what Canadian clinics should verify
- Ultrasonic cleaning vs manual scrubbing: the correct order
- How to build a two-supplier policy for single-use consumables
Plan your monthly quantities with the clinic supply planner, or print the ordering checklist and keep it with the stock sheets. Ask a Compliance Specialist at the sterilization compliance desk if the product touches reprocessing. 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. Reselling? become a distributor.
Frequently Asked Questions
How much ultrasonic cleaning solution does a clinic use per year?
A clinic changing a 6-litre bath once per working day uses about 1,500 litres of working solution a year. At a 1:200 dilution that is roughly 7.5 litres of concentrate, which is two 4-litre bottles.
What dilution ratio should I use in an ultrasonic bath?
Use the ratio on the product label for ultrasonic use. Ratios are commonly between 1:50 and 1:200 for enzymatic concentrates, and using a manual-soak ratio in a bath either wastes concentrate or under-cleans.
Can I reuse ultrasonic cleaning solution?
Only within the interval the manufacturer specifies, and never once it is visibly soiled. A used bath holds soil in suspension and redeposits it on the next load.
Is enzymatic cleaner better than a neutral solution?
Enzymatic solutions break down protein and blood residue, which matters for instruments with hinges and lumens. A neutral solution is adequate for light soil but is not a substitute for a product specified for protein removal.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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