O815229-1ml | Standard for GC，≥99.5%(GC)

R002018-10L | 99%

R002018-100ml | 99%

R002018-500ml | 99%

R080073-5ml | Standard for GC,≥99.5%(GC)

CCEM501785 | 99.1%

CCEM501785 | 99.1%

CCEM500355 | >95%

CCHM701660 | 99.9%

CCHM701612 | 98.2%