Synonym: L-Threoascorbic acid, Antiscorbutic factor, Vitamin C A calcium channel inhibitor USP Grade Ash: <0.01% Heavy metals (as Pb): <0.002% Iron: <0.001% Specific rotation (4%, 6M HCL): +20.5 to +21.5° Acidity: 4.10 Appearance: White or light…