100 μg/mL in methanol with 0.1N NH₃, ampule of 1 mL, certified reference material Synonym(s): L-Thyroxine; 3,3',5,5"-Tetraiodo-L-thyronine; 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-L-alanine; T₄ Amino Acid Sequence: Empirical Formula: …