TPH Internal Standard Back Catalog number: 92636 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0078.5-KIT Short-chained sterane Kit; includes 0674,0676,0848,0675,0641, all as 100µg/mL, , Solvent-, Unit Kit, # of units-, Cas.no. Price on request 676233 Endosulfan-sulfate, 100 µg/ml, Cyclohexane, 1ml Price on request 71629 2,4-D n-butyl ester Price on request