colored a-pvp

  1. Marvin "Popcorn" Sutton

    a-PVP crystallization

    a-PVP powder is crystallized in a solvent with 1g per 0.5-1 ml proportion. The solvent solution is prepared from water and alcohol in the 30/70, 50/50 or 70/30 ratio. It is very important to use well-purified a-PVP powder. A dirty product can make crystallization difficult. The solution is...
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