R011455-5ml | GC,≥99.9%(GC)（标准试剂）

R011456-500ml | AR,99.5%

R019974-5ml | Standard for GC,>99.5%(GC)

R011456-10L | AR,99.5%

R011457-4L | ACS,≥99.0%

NG-I3440-1G | 见证书

CCEM501785 | 99.1%

CCEM501785 | 99.1%

CCEM500355 | >95%

CCHM701660 | 99.9%