19-Nortestosterone 17-propionate, certified, 0.1g

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)

EPA Method 1618 Organochlorine Mix C

Atrazine-desisopropyl D5 (ethylamino D5), 100µg/ml in Acetone, 1ml