H17787a | 99.3%

M813018-5ml | Standard for GC，≥99.5%(GC)

M813019-500ml | >99.0%(GC)

M813019-2.5L | >99.0%(GC)

M813019-10L | >99.0%(GC)

CCEM501785 | 99.1%

CCEM501785 | 99.1%

CCEM500355 | >95%

CCHM701660 | 99.9%

CCHM701612 | 98.2%