![when u crack back meth and it grows when u crack back meth and it grows](https://filmdaily.co/wp-content/uploads/2021/01/desert-01-1024x640.jpg)
The Marquis test sort of works, but isn't super reliable because most of this stuff does contain methamphetamine, and n-iso shows no reaction to the Marquis test. If it does, that means that you now have a mixture and not a pure substance, since the two substances weren't identical. If someone sells you pure levo-meth or something, you can even test it by mixing with some known dextro-meth and seeing if this changes anything with the melting point. If it's highly-cut, then this number will be about ten degrees lower by the time it's fully solid. If it's pure, this temperature should not change much at all during solidification. Pure methamphetamine should begin crystallization between 170˚C and 175˚C, and with cut methamphetamine this would happen at a lower temperature.
![when u crack back meth and it grows when u crack back meth and it grows](https://awriterinthedesert.files.wordpress.com/2010/02/dsc_1459_thumb.jpg)
As soon as it starts to form crystals, make a note of the temperature. Wait for it to all melt, then turn off the heat and start monitoring the temperature. Eventually, the stuff in the tube will melt, and when it does, insert the thermometer. Put mineral oil or cooking oil or some other clear liquid with a high boiling point in the beaker, then put the test tube in that and heat it on a stove burner or a flame or something. Put as much of the alleged drugs in the test tube as you can. Get a glass thermometer than can measure up to at least 200˚C, a test tube, and a vial or a small beaker or something, that you can put the test tube in without it falling over. It's a common way to test the purity of any substance that's supposed to be fairly pure. So, how do you test it? If you have enough of it, the best way is probably the melting point test. If a darknet vendor is advertising the size and clarity of their crystals, rest assured, that shit is faker than a 40-year-old stripper's boobs. Isopropylbenzylamine is very easy to grow into large crystals, whereas real methamphetamine is not. It's the inevitable result of tweakers using crystal size and clarity as a way of measuring purity. It looks virtually identical to methamphetamine, and forms very large, very clear crystals, but it appears to be isopropylbenzylamine with just barely enough methamphetamine in it to keep people coming back for more. By now, any meth users with more than half a brain left (admittedly, not the highest percentage) have figured out that there's a lot of crap out there, especially on the darknets.