Cocaine acetone wash - please identify residue

Hi all,

I'm new here, but I have a question about some junk a friend of me once discovered after an acetone wash.

In short: an acetone wash was performed on a small sample of street cocaine of unknown quality. The cocaine was finger-tested (slick, oily), water-tested (transparent trails and dissolved quickly), bleach-tested (milky white trails and no residue), and tongue-tested (bitter, numb after a while).

Lab grade acetone was used and anhydric MgSO₄ was added to the bottle beforehand to make sure no water was present in the acetone.

The sample was washed two times with the acetone, and the crystals left in the filter were collected.
The acetone used to perform the wash was left to evaporate to try and see what junk there was in the original sample.

After the acetone had evaporated, a sticky, tar-like layer stuck to the bottom of the dish. After scraping up, a very thick sticky brown substance was left over, with quite a strong smell to it, although I do not know which one.
Unexpectedly, the brown sticky stuff readily dissolves in water.

Does anyone have any idea what this might be? Or how to get to know?

Picture over at http://ge.tt/9xkf2MA/v/0 and http://ge.tt/9QC43MA/v/0

Thanks for any information!

sorry but i think this will be closed. No drug ID threads aloud

Don't think anyone will be able to tell you from a picture

I think this might get more answers in OD so I'll go ahead and send it that way for you. If the mods there disagree they can do what they wish.

We really don't do substance ID's, but this doesn't seem the same as asking us to identify an unidentified substance, more like you're trying to figure out if this is going to be safe to use.

FlippingTop said:

Don't think anyone will be able to tell you from a picture

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I guess not, but maybe someone has come across a similar residue before and was able to identify it using one method or another...
Just a step in the right direction would be good!

Oxide said:

We really don't do substance ID's, but this doesn't seem the same as asking us to identify an unidentified substance, more like you're trying to figure out if this is going to be safe to use.

Click to expand...

That's the case exactly!

Could it be levimasole?

rhythmtech said:

Could it be levimasole?

Click to expand...

That seems very unlikely. Levimasole wouldn't be easily removed by performing an acetone wash because it has properties very similar to those of cocaine.

In the meantime I was able to get access to some alkaline phosphatase and a suitable substrate. The cocaine sample did not inhibit the ALKP so is unlikely to contain levimasole.

Other ideas?

It could be anything. We don't do substance IDs here or substance cut IDs here.