Interference Standard 4 Back Catalog number: 52041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673661 2-Phenylphenol, 10.0 µg/ml, Ethyl acetate, 10ml Price on request C17943500 Xylazine hydrochloride, 100mg Price on request 680468 3-Ethyltoluene, 100mg Price on request