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N-Methyl-2-pyrrolidone (NMP) is an organic compound consisting of a 5-membered lactam. It is a colorless liquid, although impure samples can appear yellow. It is miscible with water and with most common organic solvents. It also belongs to the class of dipolar aprotic solvents such as dimethylformamide and dimethyl sulfoxide.
A more polar solvent lends itself better to C-O homolysis, so polar solvents which cannot bind to a labile nitroxide are the most effective for NMP. It is generally agreed that the structural factor that has the greatest effect on the ability of a nitroxide to mediate a radical polymerization is steric bulk.
It is miscible with water and many organic solvents. [11] Dihydrolevoglucosenone has a boiling point of 226 °C at 101.325 kPa (vs 202 °C for NMP), and a vapor pressure of 12.98 Pa near room temperature (25 °C). [1] It has a comparatively high dynamic viscosity of 14.5 cP (for comparison DMF: 0.92 cP at 20 °C, NMP: 1.67 cP at 25 °C). [12]
Univar Solutions Inc.(formerly Royal Vopak) is a global chemical and ingredients distributor and provider of value-added services.. Founded in 1924 as Van Waters & Rogers, it was acquired in August 2023 by funds controlled by Apollo Global Management. [2]
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Gamma-Butyrolactone is used as a chemical solvent and a cleaning agent, [15] for example in paint stripping or for cleaning graffiti. [16] Butyrolactone is a precursor to other chemicals. Reaction with methylamine gives NMP, and with ammonia gives pyrrolidone. It is also used as a solvent in lotions and some polymers. [5]
The company's distiller in Mexico is "on a 24/7 schedule right now" trying to replenish the supply, according to Fieri. However, he warns that the holiday season, their busiest time of year for ...
From January 2008 to December 2012, if you bought shares in companies when Jeff M. Fettig joined the board, and sold them when he left, you would have a -17.6 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
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