sodium hydroxide?

[waterbear]

Sodium hydroxide has always been an "ingredient" in "plain, old sodium hypochlorite". In fact, one of the methods of manufacturing sodium hypochloite is by bubbling chlorine gas through sodium hydroxide. The sodium hydroxide actually helps maintain the shelf life. Liquid pool chlorine also contains sodium hydrxoide for that matter.
To the best of my knowledge the 'new, improved' bleach being sold is stronger. It is 8.25% instead of 5.25% or 6% so it contains less water. This means it is less expensive to ship and that they can charge more for it, much like the "ultra" 2x and 3x strength laundry detergents and fabric softeners! However, just like with pool chlorine at 10% and 12.5% it will have a shorter shelf life than the 6% strength.

[aylad]

Yeah, and it's also in a smaller bottle, which pretty much negates the increase in strength for me, as far as number of bottles I have to transport.....