Oren wrote, on Wed, 25 Jun 2014 07:24:12 -0700:
I was hoping you would mention the % of concentrated
> Clorox un-scented bleach :-\
Hi Oren,
Huckleberries are, um, I mean bleach is a strange beast indeed, which, I admit, is confusing because, while chlorinating liquid is usually sold by *trade percentage*, in contrast, a regular bleach is usually sold by *weight percentage* of product (i.e., of sodium hypochlorite).
So 8.25% bleach (sold by weight % of sodium hypochlorite) is only
7.86% available chlorine (by weight), and, assuming a 1.10 g/ml density, this is 9.08% trade percentage (i.e., % Available Chlorine by volume).
Similarly, a typical 6% bleach is 6% sodium hypochlorite by weight, which is only 5.7% available chlorine.
Hence, the two equations:
- Cost per pound of available chlorine for liquid chlorine: $cost/gallon x 1gallon/9.7pounds x 100pounds of liquid/10.78pounds available chlorine
- Cost per pound of available chlorine for liquid bleach: $cost/gallon x 1gallon/9.0pounds x 100pounds of liquid/5.7 pounds available chlorine
Sometimes things are just complicated.