... agent, optical macromolecule, elastomer, part of ethylene species and acrylic ester species polymer system.SALES SPECIFICATIONDegree of purity: min. 99 ... ppm MEHQ (HPLC) PHYSICAL DATAAppearance: clear, colorless liquidOdor: ester-likeMolecular weight: 126.2 g/molDensity: 0.93 g/cm3 ... )Flashpoint: +37.0°CSolubility (20°C): 0.40%(ester in water) GENERAL HINTSFlammable! Polymerization may be initiated by ...