What % is simpsons acid malt?

[Blinky]

I bought acid malt from brewstore in Edinburgh but they don't know what % acid it is and said to look in Simpsons page but I can't see it listed. Anybody any idea?

 

[Northern_Brewer]

It's not surprising you won't find a straightforward number for it, the whole point of acid malt is that it doesn't have acid added to it (which would breach the Reinheitsgebot), but is made in a way that encourages lactic acid bacteria to grow on it as a way round the ban on adding acid directly.

Usual rule of thumb is that 1% of the grist reduces pH by 0.1 unit.