We have heard quite a lot about acid attacks this year but could someone please enlighten me as to why anyone, outside an industrial process, needs any more than a small quantity of strong acid? I have about 1 litre of Sulphuric acid in the garage, left over from the purchase of a dry charged battery about 20 years ago and about 1/2 a 1litre bottle of Hydrochloric acid used, very occasionally for cleaning some glassware. I haven't seen dry charged batteries for sale for many years and I could as easily manage with buying 50ml of Hydrochloric acid when required instead of keeping a larger quantity. So then what else might I need any acids for? I am not talking about the small quantities in toilet cleaner here but 500ml or larger bottles of 35% acids.