... ) CAS:23783-26-8 MF:C2H5O6P 2-Hydroxyphosphonocarboxylic Acid(HPAA)CAS: 23783-26-8Molecular Formula: C2H5O6P Molecular weight: ... stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution. ... .2,Specification: ItemsIndexAppearanceDark umber transparent viscous liquidSolid content %45-50Phosphorous acid(as PO33-)% ≤4.0pH(1% solution)1-3Density (20oC) ...