EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA13230100AC Ethephon D4, 100µg/mL in Acetone, 1ml Price on request 10262.4-1G Maleic anhydrid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 108-31-6 Price on request 2393.7-K-IPX5 o-Cresol-d8, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-5, Cas.no. 203645-65-2 Price on request