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toluene

  1. D

    What is the waxy skin that forms on emulsions and how to prevent it?

    I am currently doing an A/B from 100g accuminata, i pressure cooked in phosphoric acid, strained/leeched all the salt out, then boiled down to about 500ml, did a toluene defat, and now have basified it, resulting in a lot of tannins i assume, precipitating. the solution is quite thick too, i...
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