Specific Extinction 1%,1cm:E₂₈₈ ≥630

                                           E₃₂₅ ≥410

Assay:≥ 99.0%

Melting Point:62.0℃～65.0℃

Loss On Drying:≤ 0.2%

Heavy Metals(Pb):≤ 5PPM

Burnt Residue:≤ 0.1%

Gardner Color:≤ 4.0