Certificate of Analysis

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Levothyroxine (L-Thyroxine) sodium

Product Name:	Levothyroxine (L-Thyroxine) sodium
Catalog Number:	S3747
Batch Number:	S374702

Molecular Formula:	C₁₅H₁₀I₄NO₄.Na
Molecular Weight:	798.85
CAS No.:	55-03-8
Storage (From the date of receipt):	3 years -20°C powder
Storage (From the date of receipt):	1 year -80°C in solvent
Image:

HPLC: 99.56% purity | NMR: Consistent with structure