Levothyroxine

    Levothyroxine Related Products

    Venkatasai is a leading innovator in the field of pharmaceutical reference standards, offering high-quality Reference Standards of Abacavir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamines (N-NO products). Our Abacavir impurity reference standards play a vital role in pharmaceutical research, supporting product development, ANDA and DMF filings, quality control (QC), method validation, and stability studies. They are also instrumental in identifying unknown impurities and evaluating genotoxic potential. All Abacavir-related products are thoroughly characterized and supplied with comprehensive Certificates of Analysis (COA) and analytical data that comply with regulatory standards. EP/USP traceable standards can also be provided upon request. Furthermore, all supplied products undergo periodic re-testing to ensure continued quality and reliability.

    3,3',5-Triiodo Thyropropionic Acid

    Picture of 3,3',5-Triiodo Thyropropionic Acid
    CAT No: VS-L041040
    CAS No: 51-26-3
    Mol.F.: C15H11I3O4
    Mol.Wt.: 636
    Status: Custom Synthesis

    3,3’,5-Triiodo-D-thyronine

    Picture of 3,3’,5-Triiodo-D-thyronine
    CAT No: VS-L041044
    CAS No: 5714-08-9
    Mol.F.: C15H12I3NO4
    Mol.Wt.: 651.01
    Status: Custom Synthesis

    3,5,3',5'-Tetraiodo thyrolactic acid

    Picture of 3,5,3',5'-Tetraiodo thyrolactic acid
    CAT No: VS-L041026
    CAS No: 7069-47-8
    Mol.F.: C15H10I4O5
    Mol.Wt.: 777.9
    Status: Custom Synthesis

    3-Bromo-L-thyroxine

    Picture of 3-Bromo-L-thyroxine
    CAT No: VS-L041031
    CAS No: 1798894-90-2
    Mol.F.: C15H11BrI3NO4
    Mol.Wt.: 729.9
    Status: Custom Synthesis

    Levothyroxine

    Picture of Levothyroxine
    CAT No: VS-L041000
    CAS No: 51-48-9
    Mol.F.: C15H11I4NO4
    Mol.Wt.: 776.9
    Status: Custom Synthesis

    Levothyroxine EP Impurity H 

    Picture of Levothyroxine EP Impurity H 
    CAT No: VS-L041008
    CAS No: 2055-97-2
    Mol.F.: C13H6I4O4
    Mol.Wt.: 733.8
    Status: Out of Stock

    Levothyroxine EP Impurity I

    Picture of Levothyroxine EP Impurity I
    CAT No: VS-L041009
    CAS No: 2016-06-0
    Mol.F.: C13H6I4O3
    Mol.Wt.: 717.8
    Status: Out of Stock

    Levothyroxine EP Impurity J

    Picture of Levothyroxine EP Impurity J
    CAT No: VS-L041010
    CAS No: 4604-41-5
    Mol.F.: C15H13I2NO4
    Mol.Wt.: 525.1
    Status: Custom Synthesis

    Levothyroxine EP Impurity k

    Picture of Levothyroxine EP Impurity k
    CAT No: VS-L041011
    CAS No: 5817-39-0
    Mol.F.: C15H12I3NO4
    Mol.Wt.: 650.9
    Status: Custom Synthesis

    LEVOTHYROXINE GALLIC ACID ADDUCT

    Picture of LEVOTHYROXINE GALLIC ACID ADDUCT
    CAT No: VS-L041047
    CAS No: NA
    Mol.F.: C22H15I4NO8
    Mol.Wt.: 928.97
    Status: Custom Synthesis

    Levothyroxine Glucose Adduct

    Picture of Levothyroxine Glucose Adduct
    CAT No: VS-L041028
    CAS No: N/A
    Mol.F.: C21H21I4NO9
    Mol.Wt.: 939
    Status: In Stock

    Levothyroxine Impurity 8

    Picture of Levothyroxine Impurity 8
    CAT No: VS-L041043
    CAS No: 15106-62-4
    Mol.F.: C9H9Cl2NO3
    Mol.Wt.: 250.1
    Status: Custom Synthesis

    Levothyroxine Lactose Adduct

    Picture of Levothyroxine Lactose Adduct
    CAT No: VS-L041035
    CAS No: N/A
    Mol.F.: C27H32I3NO14
    Mol.Wt.: 975.3
    Status: Custom Synthesis

    Levothyroxine Mannitol Adduct

    Picture of Levothyroxine Mannitol Adduct
    CAT No: VS-L041033
    CAS No: N/A
    Mol.F.: C21H23I4NO9
    Mol.Wt.: 941
    Status: Custom Synthesis

    Levothyroxine N-Acetyl Impurity

    Picture of Levothyroxine N-Acetyl Impurity
    CAT No: VS-L041017
    CAS No: 26041-51-0
    Mol.F.: C17H13I4NO5
    Mol.Wt.: 818.9
    Status: Out of Stock

    Levothyroxine N-Formyl-T4 Impurity (USP)

    Picture of Levothyroxine N-Formyl-T4 Impurity (USP)
    CAT No: VS-L041015
    CAS No: 671235-41-9
    Mol.F.: C16H11I4NO5
    Mol.Wt.: 804.9
    Status: Out of Stock

    Levothyroxine stearic acid impurity 1

    Picture of Levothyroxine stearic acid impurity 1
    CAT No: VS-L041048
    CAS No: NA
    Mol.F.: C33H45I4NO5
    Mol.Wt.: 1043.34
    Status: Custom Synthesis

    Levothyroxine stearic acid impurity 2

    Picture of Levothyroxine stearic acid impurity 2
    CAT No: VS-L041049
    CAS No: NA
    Mol.F.: C33H45I4NO5
    Mol.Wt.: 1043.33
    Status: Custom Synthesis

    Levothyroxine T4-Hydroxyacetic Acid

    Picture of Levothyroxine T4-Hydroxyacetic Acid
    CAT No: VS-L041014
    CAS No: 93647-48-4
    Mol.F.: C14H8I4O5
    Mol.Wt.: 763.8
    Status: Custom Synthesis

    Levothyroxine USP A

    Picture of Levothyroxine USP A
    CAT No: VS-L041013
    CAS No: N/A
    Mol.F.: C15H11I4NO5
    Mol.Wt.: 792.9
    Status: Custom Synthesis

    Levothyroxine D-Isomer

    Picture of Levothyroxine D-Isomer
    CAT No: VS-L041024
    CAS No: 51-49-0
    Mol.F.: C15H11I4NO4
    Mol.Wt.: 776.9
    Status: Custom Synthesis

    Levothyroxine EP Impurity A

    Picture of Levothyroxine EP Impurity A
    CAT No: VS-L041050
    CAS No: 6893-02-3
    Mol.F.: C15H12I3NO4
    Mol.Wt.: 651
    Status: Out of Stock

    Levothyroxine EP Impurity A (Na)

    Picture of Levothyroxine EP Impurity A (Na)
    CAT No: VS-L041002
    CAS No: 55-06-1
    Mol.F.: C15H11I3NO4 : Na
    Mol.Wt.: 650.0 : 23.0
    Status: Custom Synthesis

    Levothyroxine EP Impurity B

    Picture of Levothyroxine EP Impurity B
    CAT No: VS-L041003
    CAS No: 1628720-66-0
    Mol.F.: C15H11ClI3NO4
    Mol.Wt.: 685.4
    Status: Custom Synthesis

    Levothyroxine EP Impurity C

    Picture of Levothyroxine EP Impurity C
    CAT No: VS-L041004
    CAS No: 51-24-1
    Mol.F.: C14H9I3O4
    Mol.Wt.: 621.9
    Status: Out of Stock

    Levothyroxine EP Impurity D

    Picture of Levothyroxine EP Impurity D
    CAT No: VS-L041005
    CAS No: 67-30-1
    Mol.F.: C14H8I4O4
    Mol.Wt.: 747.8
    Status: Out of Stock

    Levothyroxine EP Impurity E

    Picture of Levothyroxine EP Impurity E
    CAT No: VS-L041006
    CAS No: 1041-01-6
    Mol.F.: C15H13I2NO4
    Mol.Wt.: 525.1
    Status: In Stock

    Levothyroxine EP Impurity F

    Picture of Levothyroxine EP Impurity F
    CAT No: VS-L041007
    CAS No: 911661-90-0
    Mol.F.: C21H13I6NO5
    Mol.Wt.: 1120.7
    Status: Out of Stock

    Levothyroxine Ethyl Ester

    Picture of Levothyroxine Ethyl Ester
    CAT No: VS-L041020
    CAS No: 76353-71-4
    Mol.F.: C17H15I4NO4
    Mol.Wt.: 804.9
    Status: Custom Synthesis

    Levothyroxine Hydroxyphenoxy Aldehyde Impurity

    Picture of Levothyroxine Hydroxyphenoxy Aldehyde Impurity
    CAT No: VS-L041018
    CAS No: 2828-49-1
    Mol.F.: C13H8I2O3
    Mol.Wt.: 466
    Status: Custom Synthesis

    Levothyroxine Impurity 1

    Picture of Levothyroxine Impurity 1
    CAT No: VS-L041036
    CAS No: 2055-94-9
    Mol.F.: C13H8I4O3
    Mol.Wt.: 719.8
    Status: Custom Synthesis

    Levothyroxine Impurity 2

    Picture of Levothyroxine Impurity 2
    CAT No: VS-L041037
    CAS No: 176258-89-2
    Mol.F.: C14H10I4O2
    Mol.Wt.: 717.9
    Status: Custom Synthesis

    Levothyroxine Impurity 3

    Picture of Levothyroxine Impurity 3
    CAT No: VS-L041038
    CAS No: 854646-83-6
    Mol.F.: C8H7I2NO3
    Mol.Wt.: 419
    Status: Custom Synthesis

    Levothyroxine Impurity 4

    Picture of Levothyroxine Impurity 4
    CAT No: VS-L041039
    CAS No: N/A
    Mol.F.: C16H12I4NO4 : Na
    Mol.Wt.: 789.9 : 23.0
    Status: Custom Synthesis

    Levothyroxine Impurity 6

    Picture of Levothyroxine Impurity 6
    CAT No: VS-L041041
    CAS No: 105172-64-3
    Mol.F.: C15H11I3N2O6
    Mol.Wt.: 696
    Status: Custom Synthesis

    Levothyroxine Impurity 7

    Picture of Levothyroxine Impurity 7
    CAT No: VS-L041042
    CAS No: 300-38-9
    Mol.F.: C9H9Br2NO3
    Mol.Wt.: 339
    Status: Custom Synthesis

    Levothyroxine Methoxyphenoxy Aldehyde Impurity

    Picture of Levothyroxine Methoxyphenoxy Aldehyde Impurity
    CAT No: VS-L041019
    CAS No: 69240-57-9
    Mol.F.: C14H10I2O3
    Mol.Wt.: 480
    Status: Custom Synthesis

    Levothyroxine Methyl Ester

    Picture of Levothyroxine Methyl Ester
    CAT No: VS-L041021
    CAS No: 32180-11-3
    Mol.F.: C16H13I4NO4
    Mol.Wt.: 790.9
    Status: Custom Synthesis

    Levothyroxine Monochloro Impurity

    Picture of Levothyroxine Monochloro Impurity
    CAT No: VS-L041022
    CAS No: 909279-46-5
    Mol.F.: C15H11ClI3NO4
    Mol.Wt.: 685.4
    Status: Custom Synthesis

    Levothyroxine N-Methylamide (USP)

    Picture of Levothyroxine N-Methylamide (USP)
    CAT No: VS-L041023
    CAS No: 2088032-52-2
    Mol.F.: C16H14I4N2O3
    Mol.Wt.: 789.9
    Status: Custom Synthesis

    Levothyroxine O-Methyl Amine Impurity

    Picture of Levothyroxine O-Methyl Amine Impurity
    CAT No: VS-L041025
    CAS No: 2230724-39-5
    Mol.F.: C15H13I4NO2
    Mol.Wt.: 746.9
    Status: Out of Stock

    Levothyroxine Sodium Hydrate

    Picture of Levothyroxine Sodium Hydrate
    CAT No: VS-L041001
    CAS No: 25416-65-3
    Mol.F.: C15H10I4NNaO4 : 5(H2O)
    Mol.Wt.: 798.9 : 5(18.0)
    Status: Custom Synthesis

    Levothyroxine USP D

    Picture of Levothyroxine USP D
    CAT No: VS-L041016
    CAS No: N/A
    Mol.F.: C14H9I4NO3
    Mol.Wt.: 746.9
    Status: Custom Synthesis

    Levothyroxine USP Sodium

    Picture of Levothyroxine USP Sodium
    CAT No: VS-L041012
    CAS No: N/A
    Mol.F.: C15H10I4NO4 : Na : x(H2O)
    Mol.Wt.: 775.9 : 23.0 : x(18.0)
    Status: Custom Synthesis

    Liothyronine Maillard Lactose Impurity

    Picture of Liothyronine Maillard Lactose Impurity
    CAT No: VS-L041032
    CAS No: N/A
    Mol.F.: C27H32I3NO14
    Mol.Wt.: 975.3
    Status: Custom Synthesis

    L-Tyrosine,3,5-diiodo-o-(4-Methoxyphenyl)

    Picture of L-Tyrosine,3,5-diiodo-o-(4-Methoxyphenyl)
    CAT No: VS-L041027
    CAS No: 94345-95-6
    Mol.F.: C16H15I2NO4
    Mol.Wt.: 539.1
    Status: Custom Synthesis

    N-Acetyl L-thyroxine ethyl ester

    Picture of N-Acetyl L-thyroxine ethyl ester
    CAT No: VS-L041030
    CAS No: 30804-52-5
    Mol.F.: C19H17I4NO5
    Mol.Wt.: 847
    Status: Custom Synthesis

    N-Formyl Thyroxine-13C6

    Picture of N-Formyl Thyroxine-13C6
    CAT No: VS-L041045
    CAS No: 1346604-89-4
    Mol.F.: C16H11I4NO5
    Mol.Wt.: 810.84
    Status: Custom Synthesis

    T4-Acetamide

    Picture of T4-Acetamide
    CAT No: VS-L041046
    CAS No: 176258-88-1
    Mol.F.: C14H9I4NO3
    Mol.Wt.: 746.8
    Status: Out of Stock

    T4-Formic acid N-methylamide

    Picture of T4-Formic acid N-methylamide
    CAT No: VS-L041029
    CAS No: 2088032-78-2
    Mol.F.: C14H9I4NO3
    Mol.Wt.: 746.8
    Status: Custom Synthesis

    β-Hydroxy Thyroxine

    Picture of β-Hydroxy Thyroxine
    CAT No: VS-L041034
    CAS No: 107849-54-7
    Mol.F.: C15H11I4NO5
    Mol.Wt.: 792.9
    Status: Custom Synthesis

    Picture for category