EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10507.7-K-ME Methylhexanamine hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request 55208 Bromate (BrO3-) Price on request 673572 Ethofumesate, 100 µg/ml, Ethyl acetate, 5ml Price on request