Melting point -40 �°C (lit.) Boiling point 197 �°C (lit.) density 0.925 g/mL at 25 �°C (lit.) vapor density 4.1 (vs air) vapor pressure 0.02 mm Hg ( 20 �°C) refractive index n20/D 1.427(lit.) Fp 201 �°F storage temp. Store below +30�°C. solubility H2O: 1 M at 20 �°C, clear, colorless form Slightly Viscous Liquid pka 15.10�±0.29(Predicted) color Clear PH 6-8 (25�ºC, 1M in H2O) Odor Ammonia-like. explosive limit 1-9.9%(V) Water Solubility soluble 2-Methyl-2,4-pentanediol (MPD) is a diol organic compound with a chiral carbon atom. It is a colorless liquid at room temperature and can be Diacetonee alcohol is hydrogenated. The appearance is colorless liquid with mild sweetness. It is miscible with water, soluble in ethanol, and soluble in most organic solvents.