Levothyroxine is a synthetic form of the thyroid hormone thyroxine (T4), primarily used to treat hypothyroidism, a condition where the thyroid gland does not produce enough hormone. It helps restore normal metabolism, energy levels, and overall well-being. Sold under various brand names such as Synthroid, Euthyrox, and Eltroxin, Levothyroxine is a critical medication requiring strict quality control. Pharmaceutical impurity standards are essential to ensure safety, efficacy, and consistency of the drug. Impurities in Levothyroxine may arise during synthesis, storage, or degradation, and must be controlled within regulatory limits to avoid adverse effects. Some of its known impurities are listed below.
Showing 1 - 11 of 11 products
Catalogue No : LEVO-OCL-004
CAS No : 618-76-8
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Synonyms
4-Hydroxy-3,5-diiodobenzoic acid
4-Hydroxy-3,5-diiodobenzoic acid
Catalogue No : LEVO-OCL-001
CAS No : 76353-71-4
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Synonyms
Ethyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate
Ethyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate
Catalogue No : LEVO-OCL-002
CAS No : 2828-49-1
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Synonyms
4-(4-Hydroxy-phenoxy)-3,5-diiodobenzaldehyde
4-(4-Hydroxy-phenoxy)-3,5-diiodobenzaldehyde
Catalogue No : LEVO-OCL-013
CAS No : 51-24-1
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Synonyms
[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic Acid; 2-(4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl)acetic Acid; 4-(4-Hydroxy-3-iodophenoxy)-3,...More Detail
[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic Acid; 2-(4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl)acetic Acid; 4-(4-Hydroxy-3-iodophenoxy)-3,...More Detail
Catalogue No : LEVO-OCL-006
CAS No : 67-30-1
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Synonyms
Levothyroxine EP Impurity D T4-Acetic Acid (USP) Tetraiodothyroacetic acid [4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]acetic acid
Levothyroxine EP Impurity D T4-Acetic Acid (USP) Tetraiodothyroacetic acid [4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]acetic acid
Catalogue No : LEVO-OCL-005
CAS No : 2055-97-2
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Synonyms
Levothyroxine EP Impurity H T4-Benzoic Acid (USP) Levothyroxine Benzoic Acid Impurity 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid
Levothyroxine EP Impurity H T4-Benzoic Acid (USP) Levothyroxine Benzoic Acid Impurity 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid
Catalogue No : LEVO-OCL-003
CAS No : 69240-57-9
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Synonyms
4-(4-Methoxyphenoxy)-3,5-diiodobenzaldehyde
4-(4-Methoxyphenoxy)-3,5-diiodobenzaldehyde
Catalogue No : LEVO-OCL-008
CAS No : 26041-51-0
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Synonyms
N-Acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine; N-Acetyl-L-thyroxine N-Acetylthyroxine;N-Acetyl-T4
N-Acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine; N-Acetyl-L-thyroxine N-Acetylthyroxine;N-Acetyl-T4
Catalogue No : LEVO-OCL-010
CAS No : 671235-41-9
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Synonyms
N-Formyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine
N-Formyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine
Catalogue No : LEVO-OCL-009
CAS No : 2088032-52-2
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Synonyms
(S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-N-methylpropanamide
(S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-N-methylpropanamide
Catalogue No : LEVO-OCL-007
CAS No : 2088032-78-2
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Synonyms
4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-N-methylbenzamide Levothyroxine T4-Formic Acid-N-Methylamide
4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-N-methylbenzamide Levothyroxine T4-Formic Acid-N-Methylamide