17-Hydroxy-3,6,9,12,15-pentaoxaheptadec-1-yl dodecanoate 17-Hydroxy-3,6,9,12,15-pentaoxaheptadec-1-yl laurate 2370-64-1 EINECS 219-136-9 PEG-6 Laurate Polyethylene glycol 300 monolaurate Polyoxyethylene (6) monolaurate