On Tuesday, August 20, 2019 at 6:44:07 AM UTC-4, David wrote:
replying to TomR, David wrote:
Rooto Professional is a 93% sulfuric acid says Rooto website:

ROOTO PROFESSIONAL DRAIN OPENER 16, 32, 64 & 128 OZ - 93% VIRGIN SULFURIC ACID
PVC of the pipes does get affected by sulfuric acid, which is perhaps the main
reason you will not see the word "safe" used by this manufacturer or by other
companies making similar products. Over time PVC pipe exposed to sulfuric acid
will become brittle, develop cracks and eventually fail. But it all depends on
the length of exposure time. I have seen results of studies of the effects of
sulfuric acid on various pipe plastics, including PVC, based on 97% sulfuric
acid. The first signs of trouble start to appear way past the 100 hours mark
(more like 300-500hrs).

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Ay Caramba! Who puts 93% sulfuric down any drains? But I suppose
it cleans em out as opposed to all the ones I tried that did nothing.
I couldn't believe it was 93%, but googling it is and I also came
across reports of people being severely injured, eg some guy bought
it at a grocery store, it fell off the bottom of the cart, broke open
and splashed on his 5 year old's leg causing a sever injury.
I'd say selling this stuff in
the kind of stores that the average Joe goes to is irresponsible.
People are used to things like this being like bleach or typical
strength drain cleaner, 93% sulfuric is some really nasty stuff.