also, in reading this chart, it seems strange that salt and asprin 
seem to have the same "health rating".  ...also the fact that the 
msds for asprin says "harmful if swallowed" is kind of amusing....and 
(aside from it being bad for plumming), who would be afraid to use 
draino (lye)?  i'm not sure how useful these "health ratings" are.

deknow

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