Nestor Kelebay wrote:
So far as antifungal properties goes, I'd put my money on Borax (which is
not a carbonate at all). Borax is a sodium/boron/H2O compound that, like
gypsum or lime, takes on various crystalline structures depending on the
amount of water bound up inside of it. It is the Boron itself that is
effective as an antifungal agent. This is why borates are commonly used
as wood preservatives in the form of "Impel" or "Cobra" rods and the
assortment of "Borocol" liquid based wood preservatives. Borate based
Impel rods are commonly used in log homes to protect the logs from wood
rot because of the very high solubility of borates in water. It is this
high water solubility that allows borate based wood preservatives to
permeate the entire log by diffusing through the moisture within the log.
Even though it is only a small number of fungii that feed on wood, borates
are effective against a wide variety of fungii, including the wood rot
fungii. But, they are of almost no health concern to mammals, and borate
based products are even allowed as food additives in some European
So far as an antibacterial agent is concerned, I'd opt for bleach there.
Bleach is sodium hypochlorite, or NaOCl. It's actually made from sea
water, and is unstable enough that it gradually decomposes back into sea
water, even when it's being stored in the jug. Thus, bleach gradually
decomposes and gets weaker. In so doing, it releases lone Oxygen atoms,
and it's these oxygen atoms that do all the work. They are highly
reactive, and react with organic molecules that are generally less stable
than inorganic molecules. It is through the same process of decompostion
to form more stable compounds that ozone (O3) and hydrogen peroxide (HOOH)
also have a "bleaching" action on colored fabrics, organic smells and hair
colour. Since the released lone Oxygen atoms react with organic
molecules, bleach is very effective at killing bacteria, viruses, molds
and fungii, and breaking up organic molecules into smaller pieces thereby
removing the colour and smell they produce.
I don't know anything about the sodium percarbonate you mentioned.
Hope this helps.
..in solidarity with the movement for change in Iran.