I had never before seen the alternative mixing directions for Pyrocat-MC (without a little water). Is the list of ingredients just those in the list under the heading "Stock A" or should one use some TEA as well?

Could that amount of heat (250degF=120degC) do some damage to any ingredient? I have mixed some formulas at lower temperature than recommended by allowing lots of time for dissolution (a week in the boot/trunk of the car on long trips). Would this be worth a try for this formula?