Paracetamol (Acetaminophen) Solubility in Water:
1g Paracetamol per 70ml water at 10C.
1g Paracetamol per 20ml water at 100C.
Aspirin (Ibuprofen) Solubility in Water:
1g Ibuprofen per 100ml water at 31C
1g Ibuprofen per 300ml water at 21C
Codeine Solubility in Water:
1g Codeine per 2.3ml water at 31C
1g Codeine per 0.7ml water at 21C
Useful Notes:
By placing your solution in the fridge or freezer, you are lowering the temperature far below the temperatures listed here. Using these figures as an estimate of solubility will give you a nice buffer in case your solution is not as pure as it could be.
Codeine has an inverse relationship when it comes to solubility in water. Normally solutes will dissolve more readily in water as the temperature of the water increases. Codeine however does the opposite. This means that cooling will not cause codeine to crystallize out of the solution. This property is one of the main reasons why cold water extractions work so well!
Useful Links:
BlueLight Post - http://forum.opiophile.org/archive/index.php/t-9985.html
Safety Spreadhseet - http://youtu.be/DA944LMCmh8
Asprin and ibuprofen are different chemicals.
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