Drug info - Is methamphetamine.HCl hygroscopic?

[ThirdEyeFloond]

While it's well known that the two most common salts of amphetamine, sulphate and hydrochloride are hygroscopic, especially the latter, my lepricon was pretty sure this wasn't the case with methamphetamine.HCl because he has never personally experienced his crystals turning into wet gooey material, and neither has a friend of his. But when the lepricon has meth in his possession it admittedly rarely as in never gets a chance to collect much dust on the shelf before it finds a way to get metabolised in his body.
Erowid states the following though "Powder methamphetamine is the hydrochloride salt form which is strongly hygroscopic (absorbs water from the air quickly)."
Is this true at all?
"Strongly" is of course rather relative, but is it hygroscopic at all?

[1wonderwoman]

Originally Posted by ThirdEyeFloond

While it's well known that the two most common salts of amphetamine, sulphate and hydrochloride are hygroscopic, especially the latter, my lepricon was pretty sure this wasn't the case with methamphetamine.HCl because he has never personally experienced his crystals turning into wet gooey material, and neither has a friend of his. But when the lepricon has meth in his possession it admittedly rarely as in never gets a chance to collect much dust on the shelf before it finds a way to get metabolised in his body.
Erowid states the following though "Powder methamphetamine is the hydrochloride salt form which is strongly hygroscopic (absorbs water from the air quickly)."
Is this true at all?
"Strongly" is of course rather relative, but is it hygroscopic at all?

I only wish I had an answer for your Question......... Instead I have a question for you! How could a CoMplEtlY clueless swim learn more on this FaSt Topic???

[ThirdEyeFloond]

Originally Posted by 1wonderwoman

I only wish I had an answer for your Question......... Instead I have a question for you! How could a CoMplEtlY clueless swim learn more on this FaSt Topic???

Lots of spare time used on reading on this great forum should do the trick

Now, back to topic shall we?

[bLuE]

yes it is.

[aronax]

methamphetamine.HCl(Chloride) highly hygroscopic
methamphetamine.H2SO4(Sulfate) is less hygroscopic
methamphetamine.H2PO4(Phosphate) is litle hygroscopic

[lovelyuy]

Meth hcl will degrade if didn't seal tight.

lovelyuy added 1 Minutes and 18 Seconds later...

but it won't adsorb water from the air.

Reputation Comments on this post:

Read the above posts, meth hcl is hygroscopic.

[OtherIsomer]

Originally Posted by lovelyuy

Meth hcl will degrade if didn't seal tight.

lovelyuy added 1 Minutes and 18 Seconds later...

but it won't adsorb water from the air.

The definition of hygroscopic is: absorbing moisture: capable of easily absorbing H2o, e.g. from the air.

The fact that methamphetamine hcl is highly hygroscopic has been documented.

Please do some research.

[lovelyuy]

The HCl salt of meth is somewhat hygroscopic but generally speaking if it is pure it does not absorb water from the air very quickly at all, if at all.
If meth appears to be 'wet' that is probably because of excess HCl remaining in the salts, or, probably as commonly, trace amounts of hygroscopic polymers which are residual from the pills the pseudoephedrine is extracted from.



Swim lazy to write so cut and paste.

lovelyuy added 3 Minutes and 26 Seconds later...

Now swio know why swim say meth hcl will degrade instead of hygroscopic

[OtherIsomer]

Swiy is saying that methamphetamine hcl will degrade if not *sealed* in an *airtight* container.
Think about it...

The casuall observer will come to the conclusion that air(which most always contains moisture) is probably the culprit of the degradation.

Unless of course methamphetamine is a very cranky,picky substance, that when uncovered will pitch a fit, whine for a little while and then degrade to prove a point. Doubtful.

Therefore, the degredation of MA-hcl is most likley caused by its hygroscopic properties.

OtherIsomer added 7 Minutes and 14 Seconds later...

In addition. Generaly speaking, methamphetamine hcl is highly hygroscopic. Swim isnt refering to any impure polymers, byproducts, exess hcl salt or poor extraction practices.

Just MA-hcl.