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DMI ref. omg074 Image title: Pentaerythritol crystals | 23.48
Pentaerythritol (CAS# 115-77-5, 2,2-bis(hydroxymethyl)-1,3-propanediol) is an alcohol used in the surface coating industries for making synthetic resins and in paints and varnishes. Polarized light, 1/4-wave plate. |