I watched a video on making a small, one day supply using 7grams of plant material and a cup of isopropyl alcohol. It appeared very doable to me. I'm still waiting to hear what makes 99% isopropyl an unacceptable solvent.
I watched a lot of different videos today and came away impressed with the method we're refining here. I'm going to go back and review Tim's instructions now and think more about the process.
Morning Sue, this is what John posted when I asked the same question....
Toxicology[edit]
Isopropyl alcohol and its metabolite, acetone, act as central nervous system (CNS) depressants.[24] Symptoms of isopropyl alcohol poisoning include flushing, headache, dizziness, CNS depression, nausea, vomiting, anesthesia, hypothermia, hypotension, shock, respiratory depression, and coma.[24] Poisoning can occur from ingestion, inhalation, or skin absorption; therefore, well-ventilated areas and protective gloves are recommended.
Around 15 g of isopropyl alcohol can have a toxic effect on a 70 kg human if left untreated.[25] However, it is not nearly as toxic as methanol or ethylene glycol.
Isopropyl alcohol does not cause an anion gap acidosis (in which a lowered blood serum pH causes depletion of bicarbonate anion) unlike ethanol and methanol. Isopropyl alcohol does, however, produce an osmolal gap between the calculated and measured osmolalities of serum, as do the other alcohols.[24]
Overdoses may cause a fruity odor on the breath as a result of its metabolism to acetone, which is further metabolized to produce the nutrients acetate and glucose.[26]
Isopropyl alcohol is oxidized to form acetone by alcohol dehydrogenase in the liver.[24]
The biological half-life of isopropyl alcohol in humans is between 2.5 and 8.0 hours.[24]
Isopropyl alcohol is denatured for certain uses, in which case the NFPA 704 rating is changed to 2,3,1.