Analyzing Pentaerythritol Stearate Homologs with NMR Spectroscopy

Analyzing Pentaerythritol Stearate Homologs with NMR Spectroscopy

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A pentaerythritol stearate sample with unknown composition was analyzed by nuclear magnetic resonance (NMR) spectroscopy (i.e., 1H NMR, quantitative 13C NMR, DEPT135, 1H-1H COSY, 1H-1H NOESY, 1H-13C HSQC and 1H-13C HMBC).The Bar Trolley results indicated that the sample contained mainly monopentaerythritol tetrastearate, but also had small amounts of monopentaerythritol tristearate, monopentaerythritol distearate, dipentaerythritol stearate and tripentaerythritol stearate, as well as a trace amount of 32oz Steel Water Bottle multipentaerythritol stearate.