General > General Technical Chat
Where to buy Hydrogen Peroxide(10-30%) these days?
alpher:
Used to buy 30% peroxide at the drugstore back in the day, to do some copper clad etching together with muriatic acid.
Now I need some to kill a mold that i've discovered behind my bathtub.
I need more than 10% concentration as I already tried commercial cleaners with that amount and they don't work for me.
Benta:
A better idea would be doing a root-cause analysis.
The mold is not there by accident, and the "just kill it with poison" strategy is short-lived at best.
james_s:
It's usually there because something stays moist for too long. Regardless of why mold appeared it is still necessary to get rid of it and peroxide is relatively safe as it breaks down into water and oxygen. I usually use a bit of chlorine bleach diluted in water for this sort of thing.
Last time I bought peroxide I was able to buy 40 volume (not 40%) at a local beauty supply store but the last time I tried all they had was the creme form which is useless. I think it got a lot harder to get after there were a couple of fairly high profile incidents involving MEKP or related substances. One of those annoying cases where something is available for decades and then some idiot ruins it for everybody.
2N3055:
Just use bleach, or mold remover.. Peroxide is controlled substance in most of the Western world..
coppercone2:
I had some bullshit growing in the sink pipe that chlorine etc would not touch and it stayed slimy and I almost went in there with a god damn bottle brush but I decided to pour 1/2 cup of 30% h2o2 in there. it foamed like a volcano and cleaned it right up without getting me dirty and contaminating my cleaning tools
excellent stuff. also use it for cleaning stuff like the home water strainer and parts when I change the filter out
the other cleaning chemicals are basically fooling around with money for the worst jobs IMO. this stuff smells better also. gets rid of yellowing on plastic much better then bleach cleaners (always mix bleach with some soap when using for scrubbing mold btw). but the hydrogen peroxide like burns it clean, it is outstandingly effective on sinks and the crevice that forms between the sink and the drain pipe.
smelly U -trap? best solution. it really cleans it out great, I tried this before with the home depot chemicals and they were junk. I suppose its bad for the septic but if you ever had a smelly shower or sink you know how much trouble that can cause. especially if you are already nauseous when you brush your teeth. all these environmentally friendly chemicals are making for a moldy stained world
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