I tried to read most of the replies, and saw CSMURDOCK pointed out Easy Clean is not a sanitizer.
I was looking for someone to say that before I did.
I looked on the ldcarlson website and it says very little beyond being labeled as a cleaner, being oxygen-based, requiring no rinse, and good for removing labels.
Perhaps the 'no rinse' wording implies it is ok as a final step before...something...it doesn't say and I can see how people could assume '...before brewing...'.
I personally don't like ambiguity regarding chemicals and would keep thinking about it.
There was an MSDS (Material Safety Data Sheet). It says the product is a powder bleach destainer, and contains Sodium Percarbonate and Sodium Sulfate.
The 'per-' prefix in '...percarbonate' means molecularly it has an extra carbonate compared to Sodium Carbonate. The two chemical components are not the same as sodium peroxyhydrate cited.
Maybe the formula has changed, but I'm basing my comments on the one I found today.
Maybe it works, but I personally would not feel comfortable calling it sanitizing.
I haven't used it myself. Just based on what I read I don't see that it is intended for repeated reuse.
If you find residue, is that after the first time you use it, or after it began to reveal other visual characteristics?
I used up my powdered sanitizer and my current product is Star-San. I have found instructions somewhere (hopefully the bottle or they are not instructions but advice) that say how long it is good before it (chemically deteriorates). I don't remember what word was used...maybe 'oxidizes'.
Ed.: From what someone said later, the 'active' oxygen disappears with time, so it doesn't 'oxidize'...I guess it 'reduces'...it that's improper terminology, well, it's effectiveness is reduced.
When people say you can sanitize with bleach, they are implying chlorine bleach. Bleach is a functional term, not a chemical one. You should look at the chemical name. The laundry chlorine bleach I just looked said 7.5% sodium hypochlorite, 92.5% other ingredients...I assume water, but the on-bottle instructions for sanitizing DO say to rinse well afterward.
Even if you find a product that states it is usable for cleaning and sanitizing, those two functions may be at different concentrations.
If reusing a cleaner by pouring it into a container for reuse, I would assume it would transport undesirable residue if it was not used alone as 'sanitizer'. If reusing after cleaning which involved removal of visible debris, it may contain solids, small/invisible and/or dissolved materiald
But I am a pretty literal instruction-follower...to a degree others are not.
I agree with Mekchu's realization there is probably a practical limit to how long a previously used chemical compound can be stored & reused.
I edited my earlier (above) rambling because parts of it were incomprehensible to ME!
Auto-correct is evil enough...my phobe/phone auto-edits because it thinks it's a smartphone. Obviously it's a dumfone.