Cas no.6915-15-7(standard: fcciv, 1996) Named(+)-malic acid Function Description:white crystals or white crystalline powder, soluble in water, alcohol and other organic solvent. Its aqueous solution is acidic. Chemical name:r-hydroxy butanedioic acid Molecular formula:c4h6o5 Molecular weight:134.09 Specification(fcciv, 1996): Assay(as c4h6o5):99.0%~100.5% Optical purity (e.E%, chiral hplc):98.0% min Specific rotation (c=8.5, h2o):+1.6 ~+2.6 Arsenic(as2o3):2.0mg/kg max Heavy metal(pb):20mg/kg max Residue on ignition:0.1% max Chloride[cl-]:0.01% max Sulfate :0.04% max Fumaric acid:0.5% max Maleic acid:0.05% max