EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended P-102S-10X Alachlor, 1.0mg/mL in MeOH, 1ml Price on request 1450.15-K-IO 4-n-Nonylphenol, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 104-40-5 Price on request X9058 Dibenzo(a,h)anthracene Price on request