C804957-5ml | Standard for GC，≥99.7%(GC)

C804959-100g | >99.0% (GC)

C804959-2.5kg | >99.0% (GC)

C804959-500g | >99.0% (GC)

C804959-10kg | >99.0% (GC)

CCEM501785 | 99.1%

CCEM501785 | 99.1%

CCEM500355 | >95%

CCHM701660 | 99.9%

CCHM701612 | 98.2%