Could someone tell me if I understand this correctly?
After checking inactive ingredients on RxList-
I’m kinda skeptical about your quoted IPA separation tech, unless the IPA is dried well, these pills contain HPMC (Hypromellose) a semisynthetic polymer that can be a bit of a pain in the ass to work with. HPMC is slightly soluble in hardware store IPA on account of its water content, but insoluble in absolute IPA so you’d need to dry the store-bought stuff or get your hands on anhydrous isopropyl alcohol. This polymer has a critical congealing temperature in the 50°C and 90°C range, therefore you’d need to be careful with heating liquids that contains any trace of water or it’ll gel up.
IPA will get you most of the way but some of the inactives will remain, it all depends on how clean you need the end product?
Here’s the list with some known solubility properties,
??? marks next to remaining adulterants.
• Butylated hydroxytoluene (E321) (Insoluble in Water) (Soluble in Alcohols, Acetone)
???
• Carnauba wax (Insoluble in Water, Alcohols @room temp) (Soluble in warm NP solvents)
• Cellulose acetate (Insoluble in Water, Alcohols) (Soluble in Acetone, NP solvents)
• Hypromellose (Insoluble in dry Alcohols, Acetone, NP solvents) (Soluble in Water <60°C)
• Lactose (Insoluble in ice cold Alcohols) (Slightly Soluble in Water)
• Phosphoric acid (Insoluble in ice cold Acetone, NP solvents) (Soluble in Water, Alcohols)
???
• Poloxamer (Insoluble in Water) (Soluble in Alcohols, Acetone, NP solvents)
???
• Polyethylene glycol (Insoluble in aliphatic hydrocarbons) (Soluble in Water, Alcohols, DCM,)
???
• Polyethylene oxides (Insoluble in dry Alcohols) (Soluble in Water, Acetone)
• Povidone (Insoluble in ice cold Acetone, NP solvents) (Soluble in Water, Alcohols)
???
• Propylene glycol (Insoluble in Petroleum ether/Naphtha) (Soluble in Water, Alcohols, Acetone)
???
• Sodium chloride (Insoluble in dry Alcohols, Acetone, NP solvents) (Soluble in Water)
• Stearic acid (Insoluble in Water) (Soluble in Alcohols, Acetone, NP solvents)
???
• Succinic acid (Insoluble in NP solvents) (Soluble in Water, Alcohols, Acetone)
???
• Synthetic iron oxides (Insoluble in Water, Alcohols, Acetone) (Soluble in Strong Acids)
• Titanium dioxide (Insoluble)
• Triacetin (Soluble in Water, Alcohols, Acetone, NP solents)
???