Hospital disinfectant kill claims
Every organism PurOne and PurTabs are registered against, with the concentration in parts per million available chlorine, the required contact time and the strain tested. Taken directly from the February 2026 EPA master labels.
How to read these claims
CONCENTRATION (PPM)
Parts per million of available chlorine in the prepared solution.
Contact time
How long the surface must stay visibly wet with the solution. Not how long you spend wiping. If the surface dries before the contact time is up, the claim does not apply.
Why one organism appears twice
Many organisms carry more than one registered claim: a lower concentration with a longer contact time, or a higher concentration with a shorter one. Both are valid. Choose based on what your protocol can realistically hold in a working room.
ATCC strain
The specific reference strain used in the efficacy testing. Included because infection prevention and procurement committees ask for it.
Soil load
Some claims were tested in the presence of organic soil. Where that applies, it is stated on the row, because a claim tested with a soil load is the more realistic number for a patient environment.
Registered claims
Grouped by claim type. Every row is reproduced from the EPA master label. Where a pathogen has its own page, the organism name links to it.
| TABLE SECTION | ROWS | WAVE |
|---|---|---|
| Bacterial disinfection, hard non-porous surfaces | 31 | First |
| MRSA and resistant organisms | 6 | First |
| Influenza | 18 | First |
| SARS-CoV-2 | 6 | First |
| Full virucidal table | 64 | Second |
| Food-contact sanitizer | part of 32 | Second |
| Fungicidal | 8 | Second |
| Tuberculosis | 2 | Second |
| Soft-surface sanitizer | 2 | Third |
Go deeper on a specific pathogen
Where an organism deserves more than a table row, it has its own page covering how it survives on surfaces, where standard protocols break down, and what the label supports.
Getting to the right concentration
Concentration is set by tablet count and water volume. Work back from the contact time your protocol can realistically hold, then confirm with a chlorine test strip before the surface is treated.
New on the February 2026 label
Black mold
Stachybotrys chartarum
commonly called black mold
Alongside:
- Penicillium chrysogenum
- Penicillium spinulosum
- Aspergillus niger
Biofilm
A biofilm claim for drains, applied as a foam, at a ten minute contact time.
Take this to your committee
Need help matching a claim to your protocol?
Our healthcare team will walk your environmental services staff through a live training session covering concentration, contact time and application technique. About 45 minutes, and there is no cost.
Request a sample EVS trainingAll efficacy claims on this page are registered with the United States Environmental Protection Agency...