Question How Amphetamin phosphate ?

[spongebomb]

hey,

for the last 20 years I have always extracted the sulphate from P2NP when producing amphetamine.

Now I wanted to produce the phosphate with 75% phosphoric acid.

I don't know the exact weight of my freebase (it was a small batch of 10g P2NP). I also want to keep the workup as small as possible this time, so I will not distill the product to better determine the weight).

So far I have always added as much acid (H2SO4) up to a PH value of ~6. I dried the freebase beforehand and dissolved it in anhydrous acetone.

What would be the procedure now with phosphoric acid, which contains a lot of water at 75%
(and the phosphate is supposed to be more water-soluble than the sulphate)?
I will do it like the way with H2S04, but is it ok stopping at same Ph level ~ 6 ?

Unfortunately, the information I find on this is quite sparse.

Can you give me some Information or links ? That was great

 

[Osmosis Vanderwaal]

According to this, it's stoichometric mole/mole. This document uses electrolysis for the reaction but acetone for the solvent and 85% phosphoric acid

Amphetamine phosphate | 139-10-6

Visit ChemicalBook To find more Amphetamine phosphate(139-10-6) information like chemical properties,Structure,melting point,boiling point,density,molecular formula,molecular weight, physical properties,toxicity information,customs codes. You can also browse global...

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[Osmosis Vanderwaal]

Butnthats not the answer you are looking for. Perhaps I can calculate it
Nope but there's this, " the ph of a 10% solution after amphetamine phosphate is 4.95-5" also both the sulfate and phosphate are freely soluble in water

US2507468A - Monobasic phosphate of 1-phenyl-2-aminopropane - Google Patents

 

[spongebomb]

thanks
but this was what i found (same like the infos on erowid)