Clopyralid is a polar herbicide with a carboxylic acid group, which belongs to the class of pyridine compounds.Clopyralid may be used as a reference standard for the determination of clopyralid in vegetables and fruits by ultra-performance liquid chromatography(UPLC) coupled with tandem mass spectrometry. Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support. Clopyralid is a polar herbicide with a carboxylic acid group, which belongs to the class of pyridine compounds.