EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8775.9-K-ME Tris(2,3-dichloropropyl)phosphate, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 78-43-3 Price on request 679665 13C6-Mefenamic acid, 10mg Price on request 56063 Europium (Eu) Price on request