~H202~

[tmdry]

Ok thanks, i don't know the actual percentage of it but it did look like it removed the color, if it was not just the residue(which i doubt it is).

 

[Jack May]

A. Liquid Peroxide - stable at any strength between 3% and 35% (unstable @ higher percentages).


Larry

If that is the case, why do they sell it at higher %'s then?

I can buy 50%... in bulk.

John

 

[Larry Cobb]

John;

It would be foolish to buy it @ >50% concentration.

Heat and slight contamination can cause immediate problems. Have you ever seen a drum rupture from overpressure ??

It is also in a higher hazard class (UN2014).

The safety agencies would demand to see your HAZCOM training program, if you had a spill.

Not worth the combined RISK.

Larry

 

[Shawn Forsythe]

Sodium Percarbonate - if full strength, is equivalent to 27.5% Hydrogen Peroxide (90 Volume).

Larry,

It's a tad bit misleading to indicate an equivalent "volume" figure, as you would have no way to use the potential 27.5% in a powder form, "at full strength", so to speak. whereas with liquid hydrogen peroxide, the volume figure is presuming liberation at a particular strength, not the volume of pure 100% hydrogen peroxide. Similarly, the "volume" equivalent of percarbonate should be expressed at potential use concentrations, not the dry powder form in which it is stored. Moreover, when we say that Percarbonate is 27.5%, it is the available oxygen, NOT the percentage of Hydrogen Peroxide by weight. Albeit the error is low by some arguments, as the available oxygen of 100% H2O2 is somewhere around 94%. (edited)

Solvay's Percarbonate FB 400 powder is indeed 27.5% available oxygen, by weight. However,practically speaking you would need to dissolve it in some sort of aqueous solution first, just as liquid hydrogen peroxide is dissolved in water. FB400 is solubility in water is 120 grams/liter, and it's density is pretty darn close to 1 gram/ml. Presuming you are not actually going to use the product in a concentration that exceeds its solubility in water, at saturation, a liter of Percarbonate & water is going to somewhere nearer 3% available oxygen.

 

[Chads]

where do i get the powder form I have never seen this stuff. and what is the usual use to add to a pre spray or to mix in a bottle for a spotting treatment, do you mix it just the same as with the liquid and add amonnia as acellerant .

 

[Larry Cobb]

Chad;

The percarbonate is available from several manufacturers.

Just insure that it is 100% percarbonate.

Our Dynachem product (Powder Brightener) is on this page:

http://www.cobbcarpet.com/dynachem.html

Larry

 

[Guest]

Larry,

If I mix 4 oz. of sodium percarbonate which I plan to buy from you, what volume will it be in a 2 gallon sprayer? Or anyone else that can answer this question.

 

[Larry Cobb]

Matthew;

4 oz (by weight) X 27% peroxide = 1.08% Peroxide = 3.3 volume

4 oz (by weight) is slightly over 4 oz by volume.

Larry

 

[ACE]

I always find myself debating the practical use of these products. Yes, It’s nice to be able to remove that problem stain when the customer points it out, but most or the time I resist the temptation to use oxy products. I just have an image in my mind of a customer getting a mild chemical burn and freaking out.

 

[Jack May]

John;

It would be foolish to buy it @ >50% concentration.

Heat and slight contamination can cause immediate problems. Have you ever seen a drum rupture from overpressure ??

It is also in a higher hazard class (UN2014).

The safety agencies would demand to see your HAZCOM training program, if you had a spill.

Not worth the combined RISK.

Larry

John

 

[Larry Cobb]

John;

It is still dangerous....

Quote from a manufacturer:

"Small amounts of other materials that contain catalysts (silver, lead, copper, chromium, mercury, and iron oxide rust) can cause rapid decomposition and an explosive pressure rupture of the containing vessel if it is not properly vented."

Larry

 

[The Great Oz]

John,
You live in a wonderful land with few guardrails, because if you're stupid enough to drive off the edge you deserved to crash. In the US, anyone connected with a misused product gets sued, and everybody pays.