Interestingly, the formula in the OP is rather ancient compared to the HDD formulas being worked on in the latter days of B&W R&D at EK. It is also interesting to add here that according to a note I made to myself over 30 years ago, and which I just found yesterday, there are two ingredients in Microdol X that are not listed in the MSDS. I assume that is due to the trade secrets law or whatever. Perhaps they are omitted due to low concentration. I do not have the formula, just that old notation.