EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79670 Phenanthridine Price on request 12128.8-100-ME Metaldehyde,100 µg/mL,MeOH,1mL, Price on request 70179 bis(2-Ethylhexyl) phthalate,1000µg/ml in MeOH, 1ml Price on request