Item# ACOXAL020G Lab grade oxalic acid dihydrate. Molecular formula: C2H2O4•2H2O Molar mass: 126.07 g/mol Melting point: 101-102 °C Acidity (pKa): pK1=1.27; pK2=4.28 Solubility in water: 14.28 g/100 ml, 50 g/100 ml @ 100 C Solubility in alcohol: 40 g/100 ml, 55.5 g/100 ml boiling Solubility in ether: 1 g/100 ml Solubility in glycerol: 18.2 g/100 ml Practically insoluble in benzene, chloroform, petroleum ether NOT SOLD FOR INGESTION. FOR LAB USE ONLY.