N-methylpyrrolidone positive-Puyang Tiancheng Chemical__Pentaerythritol_Dipentaerythritol_Tripentaerythritol_Monochloroacetic Acid_Chloroacetic Acid_C5 Hydrocarbon Resin_C5 Petroleum Resin_MTHPA_HHPA_NMP_NEP_3A Molecular Sieve_4A Molecular Sieve_5A Molecular Sieve

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N-Methylpyrrolidone is an important polar solvent with strong selectivity and good stability.

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