QSC RESEARCH GRADE
≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SynthesisChina Warehouse
What is T4 (Thyroxine / Levothyroxine)?
T4 (Thyroxine/Levothyroxine) is the primary secretory product of the thyroid gland — a prohormone converted to active T3 (triiodothyronine) by deiodinase enzymes. Acts on thyroid receptors (TRα/TRβ) to regulate metabolism, thermogenesis, cardiac function, and gene expression. Research tool for thyroid hormone pharmacology, metabolic rate, and HPT axis studies. Research use only.
Research Applications
T4-to-T3 Conversion
Deiodinase enzyme activity, tissue-specific T3 production, substrate kinetics
Thyroid Receptor Pharmacology
TRα vs TRβ selectivity, nuclear receptor binding, TRE-mediated transcription
Metabolic Rate Research
Basal metabolic rate upregulation, thermogenesis, mitochondrial uncoupling interaction
HPT Axis Research
Hypothalamic-pituitary-thyroid feedback — TSH suppression, TRH regulation
Cardiac Thyroid Research
TRα-mediated cardiac chronotropy, myosin heavy chain isoform switching
Quick Specs
| Form | Raw bulk powder (crystalline/amorphous) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 51-48-9 |
| Molecular Formula | C₁₅H₁₁I₄NO₄, MW 776.9 |
| Identity | MS molecular weight confirmed — every batch |
| Compound Type | Thyroid Hormone / TR Agonist |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house synthesis — Qingdao, China |
| Storage | Room temperature sealed | cool, dry storage |
| Shelf Life | 24 months (unopened) |
