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Examples of toxic compounds left in final products for end users.
Baba_McKensey:
page 504 contamination with o-toluidine
http://books.google.com/books?id=OWFiVaDZnkQC&pg=PA505&lpg=PA505&dq=toluidine+anthranilic+polyphosphoric&source=bl&ots=58uM1eubxO&sig=uNFEEs4fiyUFKqswAZ03E9SVncg&hl=en&sa=X&ei=G5IZVLWvGuHJ8AG6s4HgDQ&ved=0CCUQ6AEwAw#v=onepage&q=toluidine%20anthranilic%20polyphosphoric&f=false
Scarecrow:
The Hofmann rearrangement on helionamide forms 2-Cl-4,5-MDA as a side reaction (http://dx.doi.org/10.1016/j.forsciint.2012.10.002), this byproduct forms in particularly large amounts when a large excess of chlorine is used. Cyanuric acid also forms if TCCA is employed as a chlorine source. Removal of cyanuric acid should be done by vacuum filtering the cold reaction mixture before heating and discarding the precipitate. If not, taking your crude MDA it should be basified then steam distilled, extracted into something more selective such as ether, left to evaporate then MDA freebase should be vacuum distilled.
Vesp:
Whay does 2-Cl-4,5-MDA so on a neurological basis?
Scarecrow:
I dont know much about this compound, apparently MDA contaminated with the chloro derivative gives the MDA experience far more negative/bodyload effects but I dont know this from my personal experience. Ive attached the full article if you want to have a more detailed look.
thewire:
There isn't much in the literature about x-MDAs.
2-BR-4,5-MDA
http://www.erowid.org/library/books_online/pihkal/pihkal019.shtml
It is just an unwanted compound. Everybody wants a 100% pure product or at least as pure as possible.
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