Quote Originally Posted by albada View Post
My worry would be if some water got in, longevity will be worse. I suggest storing the D316 in the freezer.
Since the issue with water in your concentrate has been bugging you for many months now, some volunteer should finally set up a quantity of your concentrate, split it in half and mix one half with some amount of deionized water. With repeated activity tests every 1-3 months we could learn whether traces of water are likely going to reduce the shelf life of this concentrate.

Note that quite a few people will be reluctant to heat toxic and caustic chemicals close to 100C, so it would be quite helpful to learn if a concentrate with reasonable shelf life could be made without steaming out the water.