Category
Levothyroxine
CAS Number
Levothyroxine STD-51-48-9;25416-65-3(Na Salt);55-03-8(Sodium Salt): IMP-F-911661-90-0: IMP-G-2230724-39-5
Molecular Formula
Levothyroxine STD-C15H11I4NO4: IMP-F-C21H13I6NO5: IMP-G-C15H13I4NO2
Molecular Weight
Levothyroxine STD-776.87: IMP-F-1120.76: IMP-G-746.89
Synonym

Levothyroxine STD-(2S)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid; O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine; (-)-Thyroxine; 3,3′,5,5″-Tetraiodo-L-thyronine; 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-L-alanine;3,3',5,5'-Tetraiodo-L-thyronine; Henning; L-Thyroxin; Levothyroxine; Thyrax; Thyreoideum; Thyroxin; Thyroxinal; Tetraiodothyronine

Levothyroxine-EP-Impurity-F-(2S)-2-amino-3-[4-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenoxy]-3,5-diiodophenyl]propanoic acid

Levothyroxine-EP-Impurity-G-2-[4-(3,5-diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]ethanamine

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Purity:

Above - 95.0%

Technical Data:

We will provide complete documentation support for every Standard Material. All analytical reports such as ¹H NMR, ¹³C NMR, Mass, FT-IR, HPLC Purity/GC Purity/QNMR Purity, Water content by KF/ Loss on Drying/TGA (Thermo-gravimetric Analysis). Certificate of Analysis with potency report. Each Standard Material SER (Structure Elucidation Report) with NMR, Mass, IR spectral interpretation. This whole analytical document can be included in eCTD, ANDA, DMF submissions to regulatory agencies.

Levothyroxine for Peak Identification CRS is a certified reference substance used in analytical laboratories to confirm the identity of levothyroxine during chromatographic analysis. It provides a reliable standard for comparing retention times and peak characteristics, ensuring accurate peak identification and quality control of levothyroxine in pharmaceutical formulations.