EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9399.19-K-ME Doxepin-d3 hydrochloride Price on request 92779 EPA Method 617/8080/8250/8270 - Analytes Price on request 8669.9-100-ME Imidacloprid,100 µg/mL,MeOH,1mL, Price on request