Impurities

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 methyl ester

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