Base/Neutral & Acid Surrogate Standard Back Catalog number: 25015 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673349 Metazachlor, 100 µg/ml, Acetonitrile, 5ml Price on request 12362.16-100-ME Mono-2-ethyl-1-hexyl phthalate-3,4,5,6-d4, 100µg/ml in MeOH, 1ml Price on request 52142 EPA 1620 Standard 4 Price on request