BW901075 | 99.5%

X112050-25ml | Standard for GC, ≥99.9%(GC), xylene isomer and ethyl benzene

X112054-500ml | ACS, ≥98.5%, isomers plus ethylbenzene

X820584-5ml | Standard for GC，99.5%(GC)(二甲苯异构体+乙基苯）

X820584-25ml | Standard for GC，99.5%(GC)(二甲苯异构体+乙基苯）

NCS1603458-100B | 100μg/mL

NCS1603441-100E | 100μg/mL

NCSZ1603691-1-C2 | 25ug/L(稀释100倍)

BW08265d | 质控（0.4-40）μg/mL

BW08266d | 质控1μg/mL