Sufuric or Sulfamic?
I'm guessing that shower cleaners contain sulfamic and not sulfuric acid. Sulfamic acid is a much tamer tile and grout cleaner than hydrochloric and especially sulfuric. Sulfuric acid is highly corrosive and can cause severe burns and disfigurement if it gets on skin. Think: battery acid.
Sulfuric is used in acidic drain cleaners, but can be kind of hard to find (Santeen appears to be one traditional brand). And yes, it needs to be handled with great care, partially because it can boil water when added to it, resulting in splashback or even an explosion.
Sulfamic acid is a much more mild acid, although still corrosive.
I'm guessing that shower cleaners contain sulfamic and not sulfuric acid. Sulfamic acid is a much tamer tile and grout cleaner than hydrochloric and especially sulfuric. Sulfuric acid is highly corrosive and can cause severe burns and disfigurement if it gets on skin. Think: battery acid.
Sulfuric is used in acidic drain cleaners, but can be kind of hard to find (Santeen appears to be one traditional brand). And yes, it needs to be handled with great care, partially because it can boil water when added to it, resulting in splashback or even an explosion.
Sulfamic acid is a much more mild acid, although still corrosive.