Silver-peroxide is made with silver-nitrate, which  is very toxic and corrosive. There have been no long term studies done in the human body regarding the safety of silver. For more information on silver-nitrate and silver toxicity follow the link:


Tests & trials have clearly demonstrated that FREEBAC is more effective than silver-peroxide. We believe that when a stabilised peroxide such as FreeBac can do the same but without the silver content, then it must be promoted fully. We recommend not to use silver-peroxide in continual dosage for water systems, nor to use it under any circumstance where it may be ingested or be release into the environment.





Silver toxicity:




MSDS sheet (not updated):


EEC silver-nitrate data sheet:


Silver is Toxic article:


See Video.

The message is clear: this will slowly build up in your system and eventually large chunks of silver nitrate will be release which may cause problems. And don’t forget that 5 mg silver nitrate is very toxic!


Of great importance is the grade of the hydrogen peroxide used in silver-peroxide formulations.
If you
use silver peroxide we would advise you to ensure that the manufacturer/supplier guarantees (get it in writing with a lab rapport if necessary) that food grade peroxide (or higher) is used. Anything less will affect the products performance and high levels of heavy metals to the product. So beware!


It has recently come to our attention - when we tested the H2O2 levels of several silver-peroxides - that the peroxide level was significantly lower than claimed on the label. So check and know what you are paying for!


Several dealers/resellers are buying 50% solution of silver-peroxide, diluting it down with water  to 25% or less and selling it on. Beware that this is not the correct way of diluting this product and may cause severe problems. The product is also no longer genuine and therefore does not fall under any

approval.  So check!There are a number of problems with silver-peroxide which users should be aware of:


1. Silver

2. REACH issues

3. Chlorites

4. Environment


1. Silver.wp55cb3135.png

Silver Nitrate:

All silver-peroxides are made using silver nitrate. Silver nitrate must not be confused with colloidal silver which is an element, whereas silver nitrate is a compound.  Silver nitrate is also extremely toxic.


Silver Residue:

Silver does not break down, it does not disappear, evaporate or change into something else. Most silver-peroxides will advertise that they break down into oxygen and water. They claim that the silver just “disappears” or gets flushed out of the system. This is incorrect. From my experience, two things happen:

i. Silver stays in the system and slowly builds up – adheres to piping, tank surfaces, etc. This was repeatedly pointed out to silver-peroxide manufacturers by users who noticed piping and (tank) surfaces going very dark. This proved to be silver build up within the system.

ii. Some silver gets flushed out.


2. REACH issues.

Because there is no patent on silver-peroxide (patent was broken in a court case between Hungerbach GmbH versus Sanosil AG), none of the silver-peroxide producers will ever fully disclose their recipe. When applying for an approval for use in any country typically only the H2O2, silver and water contents are disclosed … the rest of the ingredients are never revealed or mentioned. In the UK for example, DWI is only aware that silver-peroxide contains H2O2, silver, and water!

Under EEC regulations, only product which are listed under REACH may be used. Silver- peroxide was “invented” in the 1970’s and is a complex recipe involving between 12 to 25 ingredients (depending on manufacturer).  Since many chemicals which where approved in the 1970’s are no longer considered safe and do not fall under REACH, the question arises if all the various and undisclosed ingredients in silver-peroxide meet the REACH requirements.


3. Chlorites.

A major and unrevealed downside of silver-peroxide is the effect of chlorites on the silver which stabilises and activates the solution. In contact with chlorites (salts/minerals) which are present in most water, the silver precipitates out -  ie: the silver just drops out/sinks creating a brown slurry or it adheres to surrounding surfaces. When this happens, silver-peroxide looses it’s stability and effectiveness. Chlorites basically render silver-peroxide useless! So if there is a medium to high level of chlorite in your water, don’t expect too much from silver-peroxide.


4. Environment.

This is becoming a very important issue. Because more and more chemicals and water treatment systems are using silver, silver is building up in the environment creating sterile zones. This is becoming such a problem, that many environmental groups are making an issue of this. Regulators in the US & EEC are therefore tightening up on silver regulations and there are rumours that it may be prohibited in all but a few specific applications.