Interference Standard 4 Back Catalog number: 53041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682169 (-)-delta-9-THC, 10.0 µg/ml, Methanol, 1ml Price on request 1096.10-K-IO 2-Ethylbenzofuran, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 3131-63-3 Price on request 2661.12-100-IO Arochlor 1232, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 11141-16-5 Price on request