Be informed,
PBW and "
Oxiclean" are 2 different products.
Regarding PBW
There are 2 main ingredients in PBW:
a) ~70% of
Sodium PerCarbonate (the main ingredient in
Oxiclean, and similar off-brand products)
b) ~30% of
Sodium MetaSilicate (generally sold as "TSP/90")
as well as a little Sodium EDTA
a) The
Sodium PerCarbonate component is the oxygen releasing agent in
Oxiclean. That's the component you're after. The higher the percentage of that one ingredient the more value it has.
The balance in those Oxiclean type products is usually
Sodium Carbonate, the main cheap and cheerful component used in old fashioned laundry powder. Still a very adequate cleaner by itself, alas without the Oxygen "power."
b) To make a close clone of PBW you'll need to get a bag of TSP/90 as well, a phosphorus-free alternative to TSP (Tri-Sodium Phosphate).
There are quite a few threads on homemade PBW, such as this one:
https://www.homebrewtalk.com/threads/what-is-pbw-made-from.646542/
There's also a "fancier" alternative concoction of a homemade PBW, containing Seventh (7th?) Generation cleaning powder.
I have no experience with that, but it contains a large percentage of salt (
Sodium Chloride) among a half dozen other products, IIRC.
Some people here seem to swear by it.