P815990-100ml | 高纯级，>99.5%(GC)

P815990-500ml | 高纯级，>99.5%(GC)

P815990-25ml | 高纯级，>99.5%(GC)

P815991-500ml | >99%(GC)

P815994-5ml | 分析对照品，≥99.8%(GC)

CCEM501785 | 99.1%

CCEM501785 | 99.1%

CCEM500355 | >95%

CCHM701660 | 99.9%

CCHM701612 | 98.2%