Levothyroxine
24 Results Found
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Levothyroxine API Reference standards and its EP Impurities, USP Impurities, non pharmacopeial Impurities, listed below & also offered custom synthesis for unknown Impurities. If require any contact info@drjcrbio.com, sales@drjcrbio.com
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Product Name : Levothyroxine Acetamide Impurity ; T4-Acetamide (USP) ;2-(4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetamide | 176258-88-1
Code: JCLTX-24 CAS: 176258-88-1 Chemical Formula: C14H9I4NO3 Molecular Weight: 746.84 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Acetamide Impurity ; T4-Acetamide (USP) ;2-(4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetamide | 176258-88-1 is useful as reference Impurity standard 
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Product Name : Levothyroxine beta-Hydroxy Impurity ;beta-Hydroxy T4 (USP) ; O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-beta-hydroxy-L-tyrosine | 107849-54-7
Code: JCLTX-23 CAS: 107849-54-7 Chemical Formula: C15H11I4NO5 Molecular Weight: 792.87 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine beta-Hydroxy Impurity ;beta-Hydroxy T4 (USP) ; O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-beta-hydroxy-L-tyrosine | 107849-54-7 is useful as reference Impurity standard 
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Product Name : Levothyroxine D-Isomer ; (2R)-Amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl) propanoic acid | 51-49-0
Code: JCLTX-22 CAS: 51-49-0 Chemical Formula: C15H11I4NO4 Molecular Weight: 776.87 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine D-Isomer ; (2R)-Amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl) propanoic acid | 51-49-0 is useful as reference Impurity standard 
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Product Name : Levothyroxine EP Impurity A ;Liothyronine ; (2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenyl]propanoic acid | 6893-02-3
Code: JCLTX-21 CAS: 6893-02-3 Chemical Formula: C15H12I3NO4 Molecular Weight: 650.97 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity A ;Liothyronine ; (2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenyl]propanoic acid | 6893-02-3 is useful as reference Impurity standard ![Levothyroxine EP Impurity A ;Liothyronine ; (2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenyl]propanoic acid | 6893-02-3](https://drjcrbio.com/wp-content/uploads/l-4-1.png)
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Product Name : Levothyroxine EP Impurity B ;Levothyroxine Chloro Impurity ;3-Chloro Thyroxine ; (2S)-2-Amino-3-[4-(3-chloro-4-hydroxy-5-iodophenoxy)-3,5-diiodophenyl] propanoic acid
Code: JCLTX-20 CAS: NA Chemical Formula: C15H11ClI3NO4 Molecular Weight: 685.42 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity B ;Levothyroxine Chloro Impurity ;3-Chloro Thyroxine ; (2S)-2-Amino-3-[4-(3-chloro-4-hydroxy-5-iodophenoxy)-3,5-diiodophenyl] propanoic acid is useful as reference Impurity standard ![Levothyroxine EP Impurity B ;Levothyroxine Chloro Impurity ;3-Chloro Thyroxine ; (2S)-2-Amino-3-[4-(3-chloro-4-hydroxy-5-iodophenoxy)-3,5-diiodophenyl] propanoic acid](https://drjcrbio.com/wp-content/uploads/l-5-1.png)
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Product Name : Levothyroxine EP Impurity C ;T3-Acetic Acid (USP) ;Triiodothyroacetic acid ;[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid | 51-24-1
Code: JCLTX-19 CAS: 51-24-1 Chemical Formula: C14H9I3O4 Molecular Weight: 621.93 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity C ;T3-Acetic Acid (USP) ;Triiodothyroacetic acid ;[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid | 51-24-1 is useful as reference Impurity standard ![Levothyroxine EP Impurity C ;T3-Acetic Acid (USP) ;Triiodothyroacetic acid ;[4-(4-Hydroxy-3-iodophenoxy)-3,5-diiodophenyl]acetic acid | 51-24-1](https://drjcrbio.com/wp-content/uploads/l-6-1.png)
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Product Name : Levothyroxine EP Impurity D ;T4-Acetic Acid (USP) ;Tetraiodothyroacetic acid ; [4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]acetic acid | 67-30-1
Code: JCLTX-18 CAS: 67-30-1 Chemical Formula: C14H8I4O4 Molecular Weight: 747.83 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity D ;T4-Acetic Acid (USP) ;Tetraiodothyroacetic acid ; [4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]acetic acid | 67-30-1 is useful as reference Impurity standard ![Levothyroxine EP Impurity D ;T4-Acetic Acid (USP) ;Tetraiodothyroacetic acid ; [4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]acetic acid | 67-30-1](https://drjcrbio.com/wp-content/uploads/l-7-2.png)
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Product Name : Levothyroxine EP Impurity E ;Diiodothyronine ; (2S)-2-Amino-3-[4-(4-hydroxyphenoxy)-3,5-diiodophenyl]-propanoic acid | 1041-01-6
Code: JCLTX-17 CAS: 1041-01-6 Chemical Formula: C15H13I2NO4 Molecular Weight: 525.08 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity E ;Diiodothyronine ; (2S)-2-Amino-3-[4-(4-hydroxyphenoxy)-3,5-diiodophenyl]-propanoic acid | 1041-01-6 is useful as reference Impurity standard ![Levothyroxine EP Impurity E ;Diiodothyronine ; (2S)-2-Amino-3-[4-(4-hydroxyphenoxy)-3,5-diiodophenyl]-propanoic acid | 1041-01-6](https://drjcrbio.com/wp-content/uploads/l-8-2.png)
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Product Name : Levothyroxine EP Impurity F ; Levothyroxine T6 Impurity (USP) ;O-(4-Hydroxy-3,5-diiodophenyl)thyroxine ;(2S)-2-Amino-3-[4-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenoxy]-3,5-diiodophenyl]propanoic acid | 911661-90-0
Code: JCLTX-16 CAS: 911661-90-0 Chemical Formula: C21H13I6NO5 Molecular Weight: 1120.76 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity F ; Levothyroxine T6 Impurity (USP) ;O-(4-Hydroxy-3,5-diiodophenyl)thyroxine ;(2S)-2-Amino-3-[4-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenoxy]-3,5-diiodophenyl]propanoic acid | 911661-90-0 is useful as reference Impurity standard ![Levothyroxine EP Impurity F ; Levothyroxine T6 Impurity (USP) ;O-(4-Hydroxy-3,5-diiodophenyl)thyroxine ;(2S)-2-Amino-3-[4-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenoxy]-3,5-diiodophenyl]propanoic acid | 911661-90-0](https://drjcrbio.com/wp-content/uploads/l-9.png)
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Product Name : Levothyroxine EP Impurity H ; T4-Benzoic Acid (USP) ;Levothyroxine Benzoic Acid Impurity ; 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid | 2055-97-2
Code: JCLTX-15 CAS: 2055-97-2 Chemical Formula: C13H6I4O4 Molecular Weight: 733.80 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity H ; T4-Benzoic Acid (USP) ;Levothyroxine Benzoic Acid Impurity ; 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid | 2055-97-2 is useful as reference Impurity standard 
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Product Name : Levothyroxine EP Impurity I ;Levothyroxine Benzaldehyde Impurity ;T4-Aldehyde (USP) ; 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzaldehyde | 2016-06-0
Code: JCLTX-14 CAS: 2016-06-0 Chemical Formula: C13H6I4O3 Molecular Weight: 717.80 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity I ;Levothyroxine Benzaldehyde Impurity ;T4-Aldehyde (USP) ; 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzaldehyde | 2016-06-0 is useful as reference Impurity standard 
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Product Name : Levothyroxine EP Impurity J ; 3,3’-Diiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3-iodophenyl] propanoic acid | 4604-41-5
Code: JCLTX-13 CAS: 4604-41-5 Chemical Formula: C15H13I2NO4 Molecular Weight: 525.08 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity J ; 3,3’-Diiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3-iodophenyl] propanoic acid | 4604-41-5 is useful as reference Impurity standard ![Levothyroxine EP Impurity J ; 3,3’-Diiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3-iodophenoxy)-3-iodophenyl] propanoic acid | 4604-41-5](https://drjcrbio.com/wp-content/uploads/l-12.png)
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Product Name : Levothyroxine EP Impurity K ;3,3’,5’-Triiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3-iodophenyl] propanoic acid | 5817-39-0
Code: JCLTX-12 CAS: 5817-39-0 Chemical Formula: C15H12I3NO4 Molecular Weight: 650.97 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine EP Impurity K ;3,3’,5’-Triiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3-iodophenyl] propanoic acid | 5817-39-0 is useful as reference Impurity standard ![Levothyroxine EP Impurity K ;3,3’,5’-Triiodo-L-Thyronine ;(2S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3-iodophenyl] propanoic acid | 5817-39-0](https://drjcrbio.com/wp-content/uploads/l-13.png)
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Product Name : Levothyroxine Ethyl Ester ;Ethyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate | 76353-71-4
Code: JCLTX-11 CAS: 76353-71-4 Chemical Formula: C17H15I4NO4 Molecular Weight: 804.92 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Ethyl Ester ;Ethyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate | 76353-71-4 is useful as reference Impurity standard 
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Product Name : Levothyroxine Hydroxyphenoxy Aldehyde Impurity ;3,5-Diiodo Thyroaldehyde ; 4-(4-Hydroxy-phenoxy)-3,5-diiodobenzaldehyde | 2828-49-1
Code: JCLTX-10 CAS: 2828-49-1 Chemical Formula: C13H8I2O3 Molecular Weight: 466.01 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Hydroxyphenoxy Aldehyde Impurity ;3,5-Diiodo Thyroaldehyde ; 4-(4-Hydroxy-phenoxy)-3,5-diiodobenzaldehyde | 2828-49-1 is useful as reference Impurity standard 
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Product Name : Levothyroxine Methoxyphenoxy Aldehyde Impurity ; 3,5-Diiodo Thyroaldehyde Methyl Ether ;4-(4-Methoxyphenoxy)-3,5-diiodobenzaldehyde | 69240-57-9
Code: JCLTX-09 CAS: 69240-57-9 Chemical Formula: C14H10I2O3 Molecular Weight: 480.04 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Methoxyphenoxy Aldehyde Impurity ; 3,5-Diiodo Thyroaldehyde Methyl Ether ;4-(4-Methoxyphenoxy)-3,5-diiodobenzaldehyde | 69240-57-9 is useful as reference Impurity standard 
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Product Name : Levothyroxine Methyl Ester ; Methyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate | 32180-11-3
Code: JCLTX-08 CAS: 32180-11-3 Chemical Formula: C16H13I4NO4 Molecular Weight: 709.9 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Methyl Ester ; Methyl 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate | 32180-11-3 is useful as reference Impurity standard 
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Product Name : Levothyroxine Monochloro Impurity ;Monochloro Triiodo Thyronine (USP) ; (S)-2-Amino-3-[3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl] propanoic acid
Code: JCLTX-07 CAS: NA Chemical Formula: C15H11ClI3NO4 Molecular Weight: 685.42 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Monochloro Impurity ;Monochloro Triiodo Thyronine (USP) ; (S)-2-Amino-3-[3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl] propanoic acid is useful as reference Impurity standard ![Levothyroxine Monochloro Impurity ;Monochloro Triiodo Thyronine (USP) ; (S)-2-Amino-3-[3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl] propanoic acid](https://drjcrbio.com/wp-content/uploads/l-18.png)
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Product Name : Levothyroxine N-Acetyl Impurity ;N-Acetyl-T4 (USP) ;N-Acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine | 26041-51-0
Code: JCLTX-06 CAS: 26041-51-0 Chemical Formula: C17H13I4NO5 Molecular Weight: 818.91 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine N-Acetyl Impurity ;N-Acetyl-T4 (USP) ;N-Acetyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine | 26041-51-0 is useful as reference Impurity standard 
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Product Name : Levothyroxine N-Formyl Impurity ; N-Formyl-T4 (USP) ;N-Formyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine | 671235-41-9
Code: JC-LTX-05 CAS: 671235-41-9 Chemical Formula: C16H11I4NO5 Molecular Weight: 804.88 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine N-Formyl Impurity ; N-Formyl-T4 (USP) ;N-Formyl-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine | 671235-41-9 is useful as reference Impurity standard 
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Product Name : Levothyroxine N-Methylamide (USP) ; (S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-N-methylpropanamide |2088032-52-2
Code: JCLTX-04 CAS: 2088032-52-2 Chemical Formula: C16H14I4N2O3 Molecular Weight: 789.91 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application:Levothyroxine N-Methylamide (USP) ; (S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-N-methylpropanamide is useful as reference Impurity standard ![Levothyroxine N-Methylamide (USP) ; (S)-2-Amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-N-methylpropanamide |2088032-52-2](https://drjcrbio.com/wp-content/uploads/l-21.png)
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Product Name : Levothyroxine O-Methyl Amine Impurity ; O-Methyl-Tetraiodothyroethylamine (USP) ; O-Methyl-T4-Amine (USP) ;2-[4-(3,5-Diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]ethanamine
Code: JCLTX-03 CAS: Chemical Formula: C15H13I4NO2 Molecular Weight: 746.89 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine O-Methyl Amine Impurity ; O-Methyl-Tetraiodothyroethylamine (USP) ; O-Methyl-T4-Amine (USP) ;2-[4-(3,5-Diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]ethanamine is useful as reference Impurity standard ![Levothyroxine O-Methyl Amine Impurity ; O-Methyl-Tetraiodothyroethylamine (USP) ; O-Methyl-T4-Amine (USP) ;2-[4-(3,5-Diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]ethanamine](https://drjcrbio.com/wp-content/uploads/l-22.png)
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Product Name : Levothyroxine Sodium ;Sodium 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate pentahydrate | 25416-65-3
Code: JCLTX-02 CAS: 25416-65-3 Chemical Formula: C15H20I4NNaO9 Molecular Weight: 888.93 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine Sodium ;Sodium 2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo phenyl) propanoate pentahydrate | 25416-65-3 is useful as reference Impurity standard 
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Product Name : Levothyroxine T4-Hydroxyacetic Acid Impurity ;T4-Hydroxyacetic Acid (USP) ;2-Hydroxy-2-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetic acid | 93647-48-4
Code: JCLTX-01 CAS: 93647-48-4 Chemical Formula: C14H8I4O5 Molecular Weight: 763.83 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Levothyroxine T4-Hydroxyacetic Acid Impurity ;T4-Hydroxyacetic Acid (USP) ;2-Hydroxy-2-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)acetic acid | 93647-48-4 is useful as reference Impurity standard 
