Hydrogen peroxide-H2O2

[Ray]

If you want an excellent disinfectant, get some Biosafe Systems Disease Control. It is a hydrogen peroxide-based product, but it is diluted to less than 10% of "drugstore peroxide" concentration upon application, and is stabilized with peroxyacetic acid. That means 3 things:

1) The peroxide stays chemically active until all of the solution dries up, making it a far more effective disinfectant.

2) Due to the low concentration, it demonstrates no phytotoxicity whatsoever. (I used it in my greenhouse for years.)

3) After application, your plants smell like vinegar for a short while.

[Dollythehun]

Ray, didn't you say that was once called "Zerotol?"

[estación seca]

Hydrogen peroxide 3% is not used in the US for wound cleansing unless the goal is to bubble out specks of dirt otherwise difficult to remove. It very definitely damages exposed tissue in human wounds. If you don't believe me put a little in the wound the next time you cut yourself.

[Ray]

Originally Posted by Dollythehun

Ray, didn't you say that was once called "Zerotol?"

Once upon a time... the bulk and hose-end sprayers were sold as Zero-tol, and the hand-held pump sprayers were sold as Sani-Date. A few years ago they relabeled all consumer packaging to Disease Control.

[Dollythehun]

I remember buying that in a small drum to disinfect my greenhouse. It was very effective.

[Merita]

All concentrations of H2O2 contain stabilizers, that is not stated on the label of the bottle. I have used it successfully in crown rot but at roots I do not think it is good, although its decomposition is rapid, it will affect the tissue of those that are healthy. A concentration greater than 3% would not be advisable because it is an exothermic reaction. Neither to oxygenate, we would have to pour half a liter of the peroxide to obtain 5 liters of oxygen, it is not affordable. There are other options.

[Ray]

Originally Posted by Merita

All concentrations of H2O2 contain stabilizers, that is not stated on the label of the bottle. I have used it successfully in crown rot but at roots I do not think it is good, although its decomposition is rapid, it will affect the tissue of those that are healthy. A concentration greater than 3% would not be advisable because it is an exothermic reaction. Neither to oxygenate, we would have to pour half a liter of the peroxide to obtain 5 liters of oxygen, it is not affordable. There are other options.

The stabilizer in "drugstore" 3% peroxide is stannic chloride. It is meant only to stabilize it for storage in the bottle, and not at all when used.

We used to purchase 50% H2O2 to degrade an organic polymer used in processing a ceramic pigment...until we found that it was delignifying the wooden holding tank it was added to!

[Merita]

Yes, small amounts of sodium stannate or 8-hydroxyquinoline pyrophosphate, were used as stabilizers of hydrogen peroxide, when I worked in this field. The use in orchids I saw in videos that I did not like. It is better to read everything written by the Orchid Societies and participate in the forums, the steps to follow will be guided by the knowledge acquired and by your own intuition.

[Ray]

Originally Posted by Merita

Yes, small amounts of sodium stannate or 8-hydroxyquinoline pyrophosphate, were used as stabilizers of hydrogen peroxide, when I worked in this field. The use in orchids I saw in videos that I did not like. It is better to read everything written by the Orchid Societies and participate in the forums, the steps to follow will be guided by the knowledge acquired and by your own intuition.

Out of curiosity, for whom did you work?

I was with M&T chemicals that made the tin chemicals. They were part of Elf Aquitaine, later Total Petrochemicals, who bought duPont's hydrogen peroxide business.

[Merita]

Ray, I got my Degree in Chemistry from the University of Havana, where I worked in my youth.