EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C17582000 Tilmicosin, certified, 0.1g Price on request SC-490534 10-Hydroxybenzo[h]quinoline-7-sulfonate sodium salt, 100mg Price on request 0059.19-200-T 6H-Benzo[cd]pyren-6-one, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 3074-00-8 Price on request