L-Thyroxine

Product name: L-Thyroxine

Chemical name: 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-alanine

Alias: levothyroxine; L-Thyroxine sodium salt pentahydrate; 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-alanine; 3,5,3',5'-tetraiodothyronine; beta-[(3,5-diiodo-4-hydroxyphenoxy)-3,5-diiodophenyl]alanine; l-3,5,3',5'-tetraiodothyronine; l-t4; o-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-l-tyrosin; o-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodotyrosine; t4(hormone); tetraiodothyronine

Molecular formula: C₁₅H₁₁I₄NO₄

Molecular weight: 776.93

Molecular structural formula:

Properties: white needle-like crystal. Melting point231-233°C(decompound).

Appearance: white ( light yellow ) powder

Assay: ≥98%

Melting point: 233°C-235°C

Loss on drying: ≤1%

Heavy metalsAssay (Pb): ≤10ppm

Specific rotation : [α]20D=-5°(c=1,1N NaOH: EtOH=1:2)