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25416-65-3 | Levothyroxine sodium
Product Name: Levothyroxine sodium

Other Names:

sodium (2s)-2-amino-3-[4-(4-hydroxy-35-diiodo-phenoxy)-35-diiodo-phenyl]propanoate

Catalog No:

LX2026

CAS No:

25416-65-3

MF:

C15H10I4NNaO4

MW:

798.86
Melting Point: 207 C

Boiling Point:

576.3 C at 760 mmHg

Flash Point:

302.3 C
 
 
   
 
Specification
Product Name: L-Thyroxine sodium salt hydrate
CAS No25416-65-3
Catalog No. LX2026
Molecular FormulaC15H10I4NNaO4xH2O
Molecular Weight798.86(anhydrous)
Storage: Store at 0-5C
Test Item
Specification
Appearance
An almost white or slightly brownish-yellow powder or a fine crystalline powder
Identification by NMR
Consistent with structure
Identification By Ignition
It decomposes and liberates iodine vapors
Identification By Colour Reaction
A pink color is produced
Water Content
11.0%
Optical Rotation
-5o ~ -6o
Purity by HPLC
97.5%
Related Substances (HPLC):
RRT0.65-0.70 (Liothyronine)
NMT 1.0%
RRT 1.50-1.86 (N-Acetyl-T4)
NMT 1.0%
Any other individual impurity
NMT 2.0%
Total impurities
NMT 2.5%
 
 
 

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