Home Catalog 2-oxo-2H-pyran-5-carboxylic acid 2-oxo-2H-pyran-5-carboxylic acid Login to See Price SPC Code: SPC-k150CAS RN: 500-05-0Smiles: OC(C(C=C1)=COC1=O)=OFormula: C6H4O4Purity: 95MolWeight: 140.011 We also supply large quantities and units.Easily fulfill the form for Request Quote and we will contact you. Request a Quote Availability: 1-2 weeks