DL-Norepinephrine hydrochloride

DL-Norepinephrine hydrochloride (CAS No.: 55-27-6) is a racemic catecholamine research reagent composed of equal proportions of the L and D stereoisomers, where the L form is the principal biologically active enantiomer and the D form generally exhibits minimal activity, and it is broadly categorized as a neurochemical tool compound for autonomic signaling, catecholamine biology, and translational neuroscience investigations; as an exogenous analogue of endogenous norepinephrine signaling, it is used to interrogate adrenergic mechanisms at alpha1 and beta1 adrenoceptors and downstream pathways including Gq phospholipase C inositol phosphate calcium signaling and Gs adenylyl cyclase cyclic AMP signaling, with expected in vitro pharmacology commonly discussed in nanomolar to micromolar concentration domains depending on receptor context, cellular system, and readout sensitivity, while precise potency metrics should be determined under assay specific conditions; in biomedical research workflows, it supports studies of sympathetic neuroeffector transmission, receptor bias, catecholamine uptake and metabolism, neurodegeneration associated tracer paradigms when isotopically labeled, and comparative activity profiling of stereoisomeric mixtures versus single enantiomers in cell based assays, ex vivo tissues, and animal models, and it may also be incorporated into broader screening panels examining stress axis related signaling and adrenergic modulation of immune, cardiovascular, and neuronal cell phenotypes, where the concentrations or doses used in experiments typically depend on specific experimental designs and research objectives and should be optimized with appropriate controls, stability handling, and matrix dependent exposure considerations.