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ZeroTol Broad Spectrum Algaecide/Fungicide
More than Just Ordinary Hydrogen Peroxide

Here at BioSafe Systems LLC, we are often asked about the chemistry of ZeroTol, how is works through its unique mode of oxidation, and for an explanation of how it differs from regular Hydrogen Peroxide.

The EPA-approved label for ZeroTol lists Hydrogen Dioxide (Hydrogen Peroxide) as the active ingredient, so it's natural to wonder what makes ZeroTol so exceptional.

ZeroTol uses Hydrogen Peroxide as its base chemistry, but the similarites stop there. Adding Peroxyacetic Acid, along with a proprietary blend of surfactants, stabilizers and buffering agents, results in a chemistry very different from technical grade or food grade Hydrogen Peroxide.

The addition of the Peroxyacetic Acide (PAA) creates a powerful Activated Peroxygen Compound (APC) which has 10-12 times the oxidation potential of Hydrogen Peroxide. It would take 10-12 ounces of Hydrogen Peroxide to equal the killing strength in 1 ounce of ZeroTol. Next, BioSafe Systems' surfactants and buffering agents add stability to the highly reactive APC, allowing it to remain stable under high organic loading.

The benefit of this added stability is that ZeroTol is non-phytotoxic. Since Hydrogen Peroxide breaks down easily, the instability, combined with the large volume needed for effectiveness, can cause damage to plant material.

ZeroTol's superior killing power when compared to Hydrogen Peroxide was verified in the study Efficacy of Disinfectants Applied to Plant Production Surfaces by Dr. Warren Copes, USDA/ARS researcher. This study was published in the SNA Research Conference Report, Vol. 48, 2003, Pages 12-14 and can be viewed online at:

In his study, Dr. Copes compares the efficacy of ZeroTol to an ACS grade of Hydrogen Peroxide.

He found that between 9.9-15 fl oz. of ZeroTol per gallon of water were needed to sanitize highly contaminated metal, raw pine, and plastic surfaces, respectively, of Botrytis cinerea. To achieve the same results, 34-107 fl. oz. of ACS grade Hydrogen Peroxide were needed. Based on these results, Dr. Copes stated that “commercial strength Hydrogen Peroxide should not be used as a substitute for ZeroTol."

ZeroTol also offers other valuable benefits that Hydrogen Peroxide does not. ZeroTol is EPA registered in all 50 states, and has been reviewed for compliance for Worker Safety Standards. Hydrogen Peroxide, on the other hand, is not registered for disease control. Growers using Hydrogen Peroxide, or any other non-registered products, for this purpose risk federal and state pesticide enforcement, violations of OSHA regulations, and possible legal action by employees.

The increased potency, added stability, and proper registration of ZeroTol provides growers a better, more powerful disease management tool but does not cost any more than regular Hydrogen Peroxide. Growers who simply compare price per fluid ounce are not performing an accurate assessment, since different amounts of the chmicals are needed to achieve the same results.

Hydrogen Peroxide initially seems like a bargain, but considering that more than ten times the amount would be required to achieve the same result as ZeroTol, growers will have the serious risk of phytotoxicity that comes along with higher strength of unstabilized and non-buffered Hydrogen Peroxide.

ProductPrice/Fluid Oz.Concentrate/Gallon of Solution
ZeroTol$0.311¼ OZ.
Hydrogen Peroxide$0.0313 OZ. -> 10 Times as
Much is Needed!

Since ZeroTol is capable of being used at much lower rates than generic Hydrogen Peroxide, our application costs are the same and often times lower.

BioSafe Systems has invested the time and money required in developing, testing and registering a highly engineered product specifically designed to eradicate disease on growing plant tissue. Don't put your plants at risk.

BioSafe Systems has products and programs to allow growers the most economical result possible. Growers who purchase in larger container sizes such as 55 gallon drums and 275 gallon tote containers will realize a minimum of 25% Savings over the cost of a standard 2.5 gallon container!

Webkeeper: E. W. Acosta - mailto:info@biconet.com Last Update: 25 Oct 04
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