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Tripolidine Hydrochloride
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velvetsiren

Joined: 23 Apr 2005
Posts: 2
62.24 Points

Mon Apr 25, 2005 5:53 am
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sorry if this is not the correct forum

swivs has a query about this antihistamine
to eliminate it from pseudo hcl is it best to wash with acetone when the pseudo is still a hcl salt?

i cant find what this is soluble in except water

any help for a newbie
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bio
Working Bee
Joined: 13 Feb 2005
Posts: 236
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Tue Apr 26, 2005 2:57 pm
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Hydrochlorides are in general sparingly or very sparingly soluble in cold acetone.

Have you spelled this generic name correctly? See if you can find the proper name for this antihistamine and perhaps someone will help you. You might also try the Merk Index for solubility data,
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IndoleAmine
Dreamreader Deluxe
Joined: 09 Feb 2005
Posts: 681
Location: Bahamas
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Tue Apr 26, 2005 5:21 pm
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triprolidine? heard that before...
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chemust

Joined: 22 Apr 2005
Posts: 2
Location: Australia
90.26 Points

Sat Apr 30, 2005 7:03 am
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Martindale Pharmacopeia gives the following solubility data:

Quote:

1 in 2 of water
1 in 1.5 to 1.8 of alcohol
1 in less than 1 of chloroform
1 in 2000 of ether


Acetone data is not listed but my guess would be that the salt is freely soluble in it as well since the freebase form is such a non-polar cmpd. I don't have first-hand experience with triprolidine but having recrystallised dextromethorphan HCl, I've found it to be soluble in acetone very well.

In any case, I think of particular interest is CHCl3 as it dissolves pfed HCl only sparingly (1 in 60 to 90), so a chloroform wash should practically eliminate any traces of the antihistamine (just make sure you don't use too much Wink )

If you don't have chloroform, use DCM; they're usually equivalent. (My experiments suggest pfed HCl solubility in DCM as 1 in 100+)
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velvetsiren

Joined: 23 Apr 2005
Posts: 2
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Sat Apr 30, 2005 7:40 pm
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thank you ice cold acetone seemed to do the trick
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