EPA 1620 Standard 4 Back Catalog number: 53142 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9461.10-100K-ME Spermine, 100mg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 71-44-3 Price on request 10572.21-100-AN Bisphenol A beta-D-glucuronide Price on request 673611 Fonofos, 10 µg/ml, Ethyl acetate, 10ml Price on request