BHC (delta isomer-13C6), 100µg/ml in Nonane, 1,2ml

Tolyltriazole, 100 µg/ml, Acetonitrile, 1ml

High Boiling Sulfur in Toluene for Diesel Fuel Analysis 1 50 ppm S in sulphur-free Toluene; unit: 1x5mL vials Benzo[b]naphtho[2,1-d]thiophene (0485,16) + Benzo[b]naphtho[2,3-d]thiophene (0484,16) (1:1)

4-Nitrophenol-d4, 1000µg/ml in MeOH, 1ml