EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0951.9-K-IO 7-Methylbenzothiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 14315-15-2 Price on request LA19060002CY Chlorinated Aromatics-Mix 2, 10μg/mL in Cyclohexane, 1ml Price on request 79158 N-Nitrosodi-n-propylamine Price on request