[Limpet Chicken]

Hmmm...I just had a plastic coke bottle that was being used for concentrating Tetrahydro-6,6,9-trimethyl-3-pentyl-6H-dibenzo[b,d]pyran-1-ol, which is, in itself, a sticky oily/rezinous substance, I got this down to a sticky crystalline mass with repeated purification using first a series or acetone/ethanol and diethyl ether washes.

100% of the solvents were completely evaporated away,  to leave a slightly colored product, say, pale amber color, and the product was again extracted by 2x washes with pressurised liquid butane and evaporated, however the container used to dispense and contain the butane was a PETE plastic coke bottle with a hole pierced in the cap, and there remain a few milligrammes of product crystallised in clear white crystalline needles arount the sides and bottom of the PETE which prove hard to release, could the butane have attacked the PETE making it stick the isolated product to the bottle? does supercritical butane attack PETE?

Thanks.