POPDH (C6H10O3) Propargyl-oxo-propane-2, 3-dihydroxy CAS No. 13580-38-6 Appearance: Clear yellow liquid Assay: 50% Density g/cm3 (20): 1.06~1.11 PH: 1.0~2.0 Refractive Index(20): 1.3900~1.4100 Application: Used with derivative of alkyne-alcohol, synergistic brightness to enhance leveling and filling up ability at low current region.