Transforming Penicillin G Salts to Acids

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The discussion centers on the conversion of penicillin G sodium salt to penicillic acid and subsequently to penicillin G procaine salt. The user seeks guidance on whether it's possible to revert penicillin sodium salt to its acid form and then combine it with procaine to create the desired procaine salt. There is a focus on the chemical transformations required to achieve this, particularly how to convert salts into acids. The user also questions the implications of creating a solution with a higher concentration of procaine (100%) compared to the standard 1% used in medical practice, which serves primarily as an anesthetic to minimize injection pain. Concerns are raised about the potential outcome of mixing a high concentration of procaine with the sodium salt, speculating on whether it would result in a mixture of both compounds or create an unstable solution.
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Hi all, I need some help!

some info:

Penicillic acid [CAS RN: 90-65-3]: an antibiotic substance produced by several species of Penicillium and Aspergillus

Penicillin G: Used in medicine. It is used in the form of its stable salts (benzathine, potassium, procaine, and sodium)

Penicillin G Procaine [CAS RN: 6130-64-9]: the procaine salt of penicillin G; Chemically designation is (2S,5R,6R)- 3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo [3.2.0] heptane-2-carboxylic acid WITH 2-(Diethylamino)ethyl p-aminobenzoate (1:1)I have penicillin g as sodium salt and procaine, but have not and can't find penicillin g as procaine salt.

Is there any way to revert from penicillin sodium salt to penicillic ACID and then to make solution with procaine to get the penicillin as procaine salt (not sodium)?How the salts should be transformed into acids?
 
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In the medical practice is used a solution containing only 1% procaine and penicillin g sodium, here the procaine salt's goal is just to be an anesthetic - to make the intramuscular injection free of pain, but what happens if we make a solution of for example 100% procaine (not 1%), what happens with the sodium salt, it's going to be a mess of 50% procaine and 50% sodium salt or what?
 
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