EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95421 Glycerin Price on request H281155-250MG N-Heptanoylglycine, 250mg Price on request 2066.6-K-IP 2,3-Dichlorophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 576-24-9 Price on request