WIPO - 12-1-2016 at 02:25
Hello,
can somebody inform me if it's possible to get some solid natrium Percarbonate with a hydrogen Peroxide between 30-45% ???
Does this exist and is it possible to order?
[Edit: Changed obnoxiously capitalized subject line]
[Edited on 1-12-2016 by zts16]
woelen - 12-1-2016 at 02:46
The commercial product is Na2CO3·1½H2O2. It contains appr. 30% H2O2 by weight if fully anhydrous and fresh. I think it should be possible to order
this from eBay. It also can be purchased from companies which sell cleaning chemicals.
AJKOER - 14-1-2016 at 14:00
Yes, the percarbonate product may be Na2CO3·1½H2O2, but my recent experiments suggest that is not what you get upon dissolution in water.
My guess is that the carbonate ion and H2O2 do, in fact, interact (see, for example, https://books.google.com/books?id=0pWGmybyyH4C&pg=PA266&... , https://books.google.com/books?id=R1YhmpcfmnMC&pg=PA255&... and https://books.google.com/books?id=Om_TKidEjToC&pg=PA27&a... ). Also some research, "Stability of hydrogen peroxide in sodium carbonate
solutions", by Herbert H. B. Lee. To quote from the abstract:
"The rate of decomposition of hydrogen peroxide has been measured in aqueous, concentrated (0.1–1M) reagent-grade sodium carbonate liquors
and compared with that in sodium hydroxide liquors at the same pH, temperature, and ionic strength. Over the ranges of temperature (303–323 K), pH
(10.0–10.6), and ionic strength (1.5–3.0M), and without peroxide-stabilizing additives, hydrogen peroxide decomposes about nine times faster
in the carbonate liquor than in caustic liquor."
Link: https://www.google.com/url?sa=t&source=web&rct=j&...
Bottom line, don't count those attached H2O2 molecules as being available.
[Edit] One of my experiments involved noting the quantity of oxygen released upon mixing aqueous NaOCl and H2O2 as compared to NaOCl plus [Na2CO3 +
Na2CO3.3/2H2O2], which is the commercially available product with varying amounts of added Sodium Carbonate by brand. My final opinion is that I now
view the aqueous percarbonate product as somewhat chemically unique, and not what one would have expected from its individual independent components.
[Edited on 15-1-2016 by AJKOER]