EPA 1620 Standard 4 Back Catalog number: 53142 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2296.4-1G Succinic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 110-15-6 Price on request 679407 Dimethyldioctadecylammonium chloride, 100 µg/ml, Price on request 3237.21-K-IO 12-cis-Heneicosenoic acid , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 3515-84-2 Price on request