Due to an obscure fact of chemistry, it turns out that the formula posted by Relayer is buffered, because Borax itself is buffered. When mixed into water, Borax forms the equivalent of Boric acid, thus becoming its own buffer. So Borax is self-buffering. That's why Borax is often used to calibrate pH-meters. Now, whether that formula is close to DD-X is anyone's guess.
Originally Posted by Michael R 1974
EDIT 1: Rudeofus prefers DTPA. Interestingly, the patent says "The preferred sequestering agent is [...] DTPA." So why didn't they use it in their sample formula?
EDIT 2: Looking into this some more, I see that the MSDS for DD-X specifies (1) Boric acid (Michael R mentioned this), (2) Dimezone S instead of Phenidone, and (3) DTPA instead of DAPTA. So I'd say the patent was for an early formula which the engineers improved later. Based on quantity-ranges in the MSDS, I'd say this is similar to DD-X. Given this patent-formula and the MSDS, it wouldn't be hard to reverse engineer the present formula. Anyone want to try it?
Last edited by albada; 03-25-2013 at 01:04 AM. Click to view previous post history.