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Ideal alcohol content for storage of solutions ?

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blowjay

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Jan 7, 2010
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I see many threads mention ethanol/water solutions for longterm storage of phenethylamines but the ratios are all over the place and range from 5% ethanol up to 95%. I am not concerned about the solubility of the compounds corresponding to the alcohol concentration of the solution but I would like to know what the minimum amount of ethanol needs to be to keep things such as bacteria from growing in the solution.

I know that 40% ethanol concentration is a safe to drink solution and would guess that lesser concentrations would be just as safe in regard to keeping shit from growing in the solution. The problem I am having is that I do not know what is the minimum concentration to keep things from growing is. I have tried finding this through google searches but nothing is popping up besides 40% abv liquor being seen as an example of something similar that should be good 'forever'.

Please help by posting links that are relevant, would like to get some nBOME solutions made and am a bit stuck.
 
There is a paper titled THE RELATIONSHIP OF CONCENTRATION AND GERMICIDAL EFFICIENCY OF ETHYL ALCOHOL you should look up if you can.

I believe most yeasts etc will stop growing and die at 25-30% ABV, 60-70% is best for disinfectant usage.
 
I see ideal disinfectant usage as being 70% on multiple sites but would obviously be drawn towards the 25-30% range more. I will check the paper out but I would like to also know if, in yours and others opinions, the 25% ABV sounds fine for storing a 9:1 ratio of HPBCD:25I complexed nBOME solutions for a long time.

I would be having a ~400-500 ug/mL concentration and this will be in amber vials. 25-30% is not much of a burn and this would be the ideal way I would want to go about doing this.Thank you for the reply.
 
To further ask more about this, what negative impact would I likely expect from sublingually/buccally consuming such a solution after having it sit for 6 months, 1 year, 5 years, etc.? I would assume there is not much to worry about with this but I just want to be safe. These vials would be out of light and obviously sealed. Any stories and experiences with similar things would be appreciated.
 
All you need is a bacteriostatic concentration, no need to go wild. 25% is probably good. If you are really concerned, add salt/sugar in excess. Osmotic pressure is a good way to keep things sterile too. (pickles, honey etc)

I have seen unstabilised 2c-c-nbome salt soln with tween 80 spoil with some sort of wierd ass mold after 6mo.
 
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