Originally Posted by ajdelange
Yes. It is a blend of monobasic and dibasic sodium phosphates in the ratio necessary to produce a distilled water mash pH of 5.82 at 20 °C at the recommended dose level.
The problem is that most do not use distilled water. That being so, the buffering capacity of the water we use is much greater than that of distilled water, so it's harder to change the mash ph using 5.2. In fact, 5.2 has never worked for myself and many others.