A synthetic form of thyroid hormone, Thyroxine. Levothyroxine is used in the treatment of thyroid hormone deficiency and certain types of thyroid tumors. It is a levorotatory enantiomer of Thyroxine. Reference standards of Levothyroxine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
Ethyl 2-(4-hydroxy-3,5-dinitrophenyl)acetate
Catalogue No.:PAI 12 008258
CAS :
Molecular Formula : C10H10N2O7
Molecular Weight : 270.2
Ethyl 2-(4-(4-methoxyphenoxy)-3,5-dinitrophenyl)acetate
Catalogue No.:PAI 12 008259
Molecular Formula : C17H16N2O8
Molecular Weight : 376.32
Ethyl 2-(3,5-diamino-4-(4-methoxyphenoxy)phenyl)acetate
Catalogue No.:PAI 12 008260
Molecular Formula : C17H20N2O4
Molecular Weight : 316.36
2-(3,5-Diiodo-4-(4-methoxyphenoxy)phenyl)acetic Acid
Catalogue No.:PAI 12 008261
Molecular Formula : C15H12I2O4
Molecular Weight : 510.07
2-(4-Hydroxy-3,5-dinitrophenyl)acetic Acid
Catalogue No.:PAI 12 008262
Molecular Formula : C8H6N2O7
Molecular Weight : 242.14
3,5-Diiodo-4'-O-methyl Thyroacetic Acid Ethyl Ester
Catalogue No.:PAI 12 008263
Molecular Formula : C17H16I2O4
Molecular Weight : 538.12
(S)-2-((tert-Butoxycarbonyl)amino)-3-(4-(4-((4-hydroxycyclohexa-1,3-dien-1-yl)oxy)-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic Acid
Catalogue No.:PAI 12 008264
Molecular Formula : C26H25I4NO7
Molecular Weight : 971.1
(S)-2-Amino-3-(4-(4-(4-hydroxyphenoxy)-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic Acid
Catalogue No.:PAI 12 008265
Molecular Formula : C21H15I4NO5
Molecular Weight : 868.97
Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(3-chloro-4-hydroxyphenyl)propanoate
Catalogue No.:PAI 12 008266
Molecular Formula : C15H20ClNO5
Molecular Weight : 329.78
Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(4-(4-((tert-butyldimethylsilyl)oxy)phenoxy)-3-chloro-5-iodophenyl)propanoate
Catalogue No.:PAI 12 008267
Molecular Formula : C27H37ClINO6Si
Molecular Weight : 662.03
Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(3-chloro-4-(4-hydroxyphenoxy)-5-iodophenyl)propanoate
Catalogue No.:PAI 12 008268
Molecular Formula : C21H23ClINO6
Molecular Weight : 547.77
(S)-2-((tert-Butoxycarbonyl)amino)-3-(3-chloro-4-(4-hydroxyphenoxy)-5-iodophenyl)propanoic Acid
Catalogue No.:PAI 12 008269
Molecular Formula : C20H21ClINO6
Molecular Weight : 533.74
Levothyroxine Glucose Adduct
Catalogue No.:PA 12 0151000
Molecular Formula : C21H21I4NO9
Molecular Weight : 939.01
2-(4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetonitrile
Catalogue No.:PAI 12 008272
Molecular Formula : C14H7I4NO2
Molecular Weight : 728.83
Methyl 4-(4-hydroxyphenoxy)-3,5-diiodobenzoate
Catalogue No.:PAI 12 008273
Molecular Formula : C14H10I2O4
Molecular Weight : 496.04
2-Hydroxy-2-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetonitrile
Catalogue No.:PAI 12 008274
Molecular Formula : C14H7I4NO3
Molecular Weight : 744.83
Levothyroxine Peak Identification Mixture
Catalogue No.:PA 12 0151001
Molecular Formula : NA
Molecular Weight : NA
Levothyroxine-Lactose Maillard Impurity
Catalogue No.:PA 12 0151002
Molecular Formula : C27H31I4NO14
Molecular Weight : 1101.16
N-Acetyl-3-iodotyrosine
Catalogue No.:PA 12 0151003
Molecular Formula : C11H12INO4
Molecular Weight : 349.12
((2R,3S,4R,5R,6S)-4,5,6-Trihydroxy-3-(((2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)tetrahydro-2H-pyran-2-yl)methyl 4-methylbenzenesulfonate
Catalogue No.:PAI 12 008275
Molecular Formula : C19H28O13S
Molecular Weight : 496.48
Methyl (2S)-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)-2-(((3,4,5-trihydroxy-6-((3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)tetrahydro-2H-pyran-2-yl)methyl)amino)propanoate
Catalogue No.:PAI 12 008276
Molecular Formula : C28H33I4NO14
Molecular Weight : 1115.18
(2S)-2-(3-(Carboxymethyl)-3-hydroxy-2,5-dioxopyrrolidin-1-yl)-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic Acid
Catalogue No.:PA 12 0151004
Molecular Formula : C21H15I4NO9
Molecular Weight : 932.97
(S)-2-((tert-Butoxycarbonyl)amino)-3-(3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl)propanoic Acid
Catalogue No.:PAI 12 008271
Molecular Formula : C20H19ClI3NO6
Molecular Weight : 785.54
Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl)propanoate
Catalogue No.:PAI 12 008270
Molecular Formula : C21H21ClI3NO6
Molecular Weight : 799.56
Thyroxamine
Catalogue No.:PA 12 15800
Molecular Formula : C14H11I4NO2
Molecular Weight : 732.86
Ethyl (S)-2-acetamido-3-(4-(4-methoxyphenoxy)-3,5-dinitrophenyl)propanoate
Catalogue No.:PA 12 0151005
Molecular Formula : C20H21N3O9
Molecular Weight : 447.4
Ethyl (S)-2-acetamido-3-(3,5-diamino-4-(4-methoxyphenoxy)phenyl)propanoate
Catalogue No.:PA 12 0151006
Molecular Formula : C20H25N3O5
Molecular Weight : 387.44
Ethyl (S)-2-acetamido-3-(3,5-diiodo-4-(4-methoxyphenoxy)phenyl)propanoate
Catalogue No.:PA 12 0151007
Molecular Formula : C20H21I2NO5
Molecular Weight : 609.2
(S)-2-Acetamido-3-(4-hydroxy-3,5-dinitrophenyl)propanoic Acid
Catalogue No.:PA 12 0151008
Molecular Formula : C11H11N3O8
Molecular Weight : 313.22
Ethyl (S)-2-acetamido-3-(4-hydroxy-3,5-dinitrophenyl)propanoate
Catalogue No.:PA 12 0151009
Molecular Formula : C13H15N3O8
Molecular Weight : 341.28
4-(4-Methoxyphenoxy)benzaldehyde
Catalogue No.:PAI 12 008277
Molecular Formula : C14H12O3
Molecular Weight : 228.25
4-(4-Hydroxyphenoxy)benzaldehyde
Catalogue No.:PAI 12 008278
Molecular Formula : C13H10O3
Molecular Weight : 214.22
4-(4-Hydroxyphenoxy)-3,5-diiodobenzaldehyde
Catalogue No.:PAI 12 076001
Molecular Formula : C13H8I2O3
Molecular Weight : 466.01
(S)-2-Amino-3-(4-(3-(4-(4-((S)-2-amino-2-carboxyethyl)-2,6-diiodophenoxy)-2,6-diiodophenoxy)-4-hydroxy-5-iodophenoxy)-3,5-diiodophenyl)propanoic Acid
Catalogue No.:PA 12 0151010
Molecular Formula : C30H21I7N2O8
Molecular Weight : 1425.84
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