3,3',5-Triiodo-L-thyro (Na xH2O), 100 mg

This sodium salt hydrate of 3,3',5-triiodo-L-thyronine (T3) is a biologically active thyroid hormone supplied by STEMCELL Technologies as a 100 mg vial of lyophilized powder. T3 binds nuclear thyroid hormone receptors and modulates basal metabolic rate, mitochondrial activity, and gene expression programs controlling cellular growth and lineage specification. In stem cell and primary cell culture workflows, it is routinely added to differentiation media to drive commitment of oligodendrocyte progenitors, cardiomyocytes, hepatocytes, and intestinal organoids, and to support maturation of brown adipocytes and myogenic precursors. The compound is soluble in dilute aqueous base and is typically reconstituted in 1 M NaOH before dilution in culture medium for working concentrations in the low nanomolar range. For research use only; not intended for diagnostic or therapeutic applications in humans. Store the powder frozen at -20 °C, protected from light and moisture, with long-term stability under those conditions. Each vial contains the sodium salt hydrate form, which offers improved handling and solubility compared with the free acid and is compatible with in vitro cell-based assays investigating hormone signaling, metabolic regulation, and developmental biology.