Interference Standard 4 Back Catalog number: 52041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9530.19-100MG Clomipramine hydrochloride Price on request X9143 4-Nitroaniline Price on request 57011 Sodium (Na), 1000µg/ml in 2%-HNO3/Water, 100ml Price on request