According to the Material Safety Data Sheet there are only 2 ingredients: Ethyl Alcohol 75-95 Wt % Methyl Alcohol 5-10 Wt % . I'm just curious as I mentioned in my previous post..that someone on another forum had indicated that Methanol worked especially well for winterization. They had also mentioned that Methanol was the most explosive and polar of the alcohols used and the real key to its safe use was in the frozen extraction and subsequent purging. I'm hoping to get some further insight regarding the above mixtures potential for the process.
Methanol is more polar that Isopropanol or Ethanol, so does the best job of winterizing, but has obvious health issues requiring close attention to detail when purging. I personally still use Ethanol, because it has less of those health issues and it doesn't scare as many people, when they hear you used it to make their medications.
A subtle difference, but I also prefer the taste of an Ethanol winterization more, even after purging. It is a smoother, rounder taste.
In a 95/5% mixture, the differences would be much less and it most certainly would work for the process. I would also rather work with it, than a mixture also containing an embittering agent or Isopropyl, which is closer to the boiling point of Ethanol.