Ghoul
Member
Hikma's is very smooth. Never had an issue. Must be very little residual carboxylic acid in the final product.
Enanthic acid - Wikipedia
en.m.wikipedia.org
Anyone correlate PIP with residual free COOH in the raws. Fun GCMS project.
What would trouble me is it developing in batches of oil that were initially pip free, and the reports of long lasting symptoms going far beyond pip in some individuals.
All anecdotal, but without the "problem" being identified with certainty, it seems best to steer clear.

