Recently my bottle of 18 month old MMS did not provide the amount of CLO2 I was expecting when running some tests. I made a new batch of MMS and that worked. Similar problem with 4% HCL, but it was about 4 years old. I made a new batch of that and was good to go. Both were kept at room temperature out of light. They might have lasted longer in a fridge. But, if kept in a fridge, they activate slower when making MMS1, CDS, or CDH, so warm them up first.
Terry, those crystals are normal and not an indication of a bad product. Remember that sodium chlorite is considered a salt and that is what you are seeing. A small amount of MMS dries out leaving some salt behind. You will find it on any MMS bottle cap.
Disclaimer:These statements have not been evaluated by the Food and Drug Administration. MMS (Master Mineral Solution) has not been FDA approved to diagnose, cure, mitigate, treat, or prevent any disease. Chlorine Dioxide is also called MMS throughout this website. License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.