
Manford
Student
- Dec 7, 2020
- 127
I have some in powder form that is about 4 1/2 yrs old. The PPH says that it is very stable and can last decades if stored properly. Mine isn't stored exactly as they suggest but it is vacuum sealed and has 2 additional layers of bagging. I am sending a sample in for quantitative testing. Does anyone have experience with storing it ?