Levothyroxine Impurities

• Levothyroxine Impurities
• 
• Impurity: O-methyl-tetraiodo-thyroethylamine
• Chemical Name: 2-[4(3,5-Diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]-ethyl amine or T4 -amine -O-methyl

• Levothyroxine Impurities
• 
• Impurity: Levothyroxine EP Impurity A (Liothyronine)
• Chemical Name: 2-Amino-3-[4-(4-hydroxy-3-iodo-phenoxy)3,5-diiodophenoxy]-propionic acid

• Levothyroxine Impurities
• 
• Impurity: Levothyroxine N-methylamide
• Chemical Name: 2-Amino-3-[4-(4-hydroxy-3,5-diiodo-phenoxy)3,5-diiodo-phenyl]-N-methyl-propionamide

• Levothyroxine Impurities
• 
• Impurity: Levothyroxine EP Impurity C
• Chemical Name: [4-(4-Hydroxy-3-iodo-phenoxy)-3,5-diiodo-phenyl]-acetic acid or T3-Acetic acid

• Levothyroxine Impurities
• 
• Impurity: Levothyroxine EP Impurity D
• Chemical Name: [4-(4-Hydroxy-3,5-di-iodo-phenoxy)-3,5-diiodo-phenyl]-acetic acid or T4-Acetic acid

• Levothyroxine Impurities
• 
• Impurity: 3,5-Diiodo-L-tyrosine
• Chemical Name: 2-Amino-3-(4-hydroxy-3,5-diiodophenyl)-propanoic acid

• Levothyroxine Impurities
• 
• Impurity: O-Methyl Levothyroxine
• Chemical Name: 3-Amino-3-[4-(2,4-diiodo-3-methoxy-phenoxy)-3,5-diiodo-phenyl]-propionic acid

• Levothyroxine Impurities
• 
• Impurity: O-Methyl levothyroxine methyl ester
• Chemical Name: 2-Amino-3[4-(2,4-diiodo-3-methoxyphenoxy)-3,5-diiodophenyl]-propionic acid