Thyroxine Pharmaceutical Reference Standards
THYROXINE IMPURITIES, IMPURITIES
*Levothyroxine
| CAT No. | : CS-T-44338 |
| Mol F. | : C16H13I4NO4 |
| Mol W. | : 790.9 g/mol |
| Cas No. | : 32180-11-3 |
| Stock | : IN-Stock |
![[13C6]-L-Thyroxine sulfate](https://clearsynth.com/structure/-13C6--L-Thyroxine--sulfate.png "Thyroxine")
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
[13C6]-L-Thyroxine sulfate
| CAT No. | : CS-EK-00140 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 77074-49-8 unlabeled |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
3-Bromo-L-thyroxine
| CAT No. | : CS-T-93287 |
| Mol F. | : C15H11BrI3NO4 |
| Mol W. | : 729.87 g/mol |
| Cas No. | : 1798894-90-2 |
| Stock | : Enquire |
THYROXINE INTERMEDIATES, INTERMEDIATES
Boc-d-thyroxine
| CAT No. | : CS-ED-13996 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 89624-64-6 |
| Stock | : Enquire |
THYROXINE API STANDARDS, API STANDARDS
Dextrothyroxine Sodium
| CAT No. | : CS-L-00144 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 137-53-1 |
| Stock | : Enquire |
THYROXINE API STANDARDS, API STANDARDS
D-Thyroxine
| CAT No. | : CS-T-62056 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 51-49-0 |
| Stock | : Enquire |
THYROXINE BUILDING BLOCKS, BUILDING BLOCKS
Fmoc-L-thyroxine
| CAT No. | : CS-M-29819 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 151889-56-4 |
| Stock | : Enquire |
THYROXINE API STANDARDS, API STANDARDS
Levothyroxine
| CAT No. | : CS-BB-00023 |
| Mol F. | : C₁₅H₁₁I₄NO₄ |
| Mol W. | : 776.87 g/mol |
| Cas No. | : 51-48-9 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine - Impurity G
| CAT No. | : CS-O-39515 |
| Mol F. | : C15H13I4NO2 |
| Mol W. | : 746.89 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE USP STANDARDS, USP STANDARDS
Levothyroxine (1365000)
| CAT No. | : CS-EB-02386 |
| Mol F. | : C₁₅H₁₁I₄NO₄ |
| Mol W. | : 782.81 g/mol |
| Cas No. | : 51-48-9 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Levothyroxine- 13C6
| CAT No. | : CS-O-38573 |
| Mol F. | : C913C6H11I4NO4 |
| Mol W. | : 782.83 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Levothyroxine D3
| CAT No. | : CS-O-16186 |
| Mol F. | : C₁₅H₈D₃I₄NO₄ |
| Mol W. | : 779.89 g/mol |
| Cas No. | : Not Available |
| Stock | : IN-Stock |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Levothyroxine- D5
| CAT No. | : CS-O-38575 |
| Mol F. | : C15H6D5I4NO4 |
| Mol W. | : 781.90 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
levothyroxine Dimer
| CAT No. | : CS-O-45712 |
| Mol F. | : C30H21I7N2O8 |
| Mol W. | : 1425.84 g/mol |
| Cas No. | : 2088032-62-4 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity B
| CAT No. | : CS-O-15811 |
| Mol F. | : C₁₅H₁₁ClI₃NO₄ |
| Mol W. | : 685.42 g/mol |
| Cas No. | : 1628720-66-0 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity C
| CAT No. | : CS-T-45488 |
| Mol F. | : C₁₄H₉I₃O₄ |
| Mol W. | : 621.93 g/mol |
| Cas No. | : 51-24-1 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity D
| CAT No. | : CS-T-43890 |
| Mol F. | : C₁₄H₈I₄O₄ |
| Mol W. | : 747.83 g/mol |
| Cas No. | : 67-30-1 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity E
| CAT No. | : CS-T-19369 |
| Mol F. | : C₁₅H₁₃I₂NO₄ |
| Mol W. | : 525.08 g/mol |
| Cas No. | : 1041-01-6 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity F
| CAT No. | : CS-T-62058 |
| Mol F. | : C₂₁H₁₃I₆NO₅ |
| Mol W. | : 1120.76 g/mol |
| Cas No. | : 911661-90-0 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity G hydrochloride
| CAT No. | : CS-O-33624 |
| Mol F. | : C₁₅H₁₄ClI₄NO₂ |
| Mol W. | : 783.35 g/mol |
| Cas No. | : 2230724-39-5 (Freebase) |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity H
| CAT No. | : CS-T-43894 |
| Mol F. | : C₁₃H₆I₄O₄ |
| Mol W. | : 733.80 g/mol |
| Cas No. | : 2055-97-2 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity I
| CAT No. | : CS-T-43892 |
| Mol F. | : C₁₃H₆I₄O₃ |
| Mol W. | : 717.80 g/mol |
| Cas No. | : 2016-06-0 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine EP Impurity K
| CAT No. | : CS-O-14067 |
| Mol F. | : C₁₅H₁₂I₃NO₄ |
| Mol W. | : 650.97 g/mol |
| Cas No. | : 5817-39-0 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Ethyl Ester
| CAT No. | : CS-T-44337 |
| Mol F. | : C17H15I4NO4 |
| Mol W. | : Not Available |
| Cas No. | : 76353-71-4 |
| Stock | : IN-Stock |
THYROXINE USP STANDARDS, USP STANDARDS
Levothyroxine for Peak Identification ()
| CAT No. | : CS-EB-01197 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 55-03-8 |
| Stock | : Enquire |
THYROXINE EP STANDARDS, EP STANDARDS
Levothyroxine for peak identification (Y0001382)
| CAT No. | : CS-EG-01445 |
| Mol F. | : C15H12I4NNaO5 |
| Mol W. | : 816.87 g/mol |
| Cas No. | : 25416-65-3 |
| Stock | : Enquire |
THYROXINE SECONDARY STANDARDS, SECONDARY STANDARDS
Levothyroxine for Peak Identification(Secondary Standards traceble to USP)
| CAT No. | : CS-ER-01189 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 55-03-8 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Glucose Adduct
| CAT No. | : CS-P-08177 |
| Mol F. | : C₂₁H₂₁I₄NO₉ |
| Mol W. | : 939.01 g/mol |
| Cas No. | : Not Available |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Impurity 30 Sodium Salt
| CAT No. | : CS-P-08125 |
| Mol F. | : C16H13I4NO4. Na |
| Mol W. | : 812.88 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine- Impurity 5
| CAT No. | : CS-DN-00016 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Lactose Adduct
| CAT No. | : CS-P-08082 |
| Mol F. | : C₂₇H₃₁I₄NO₁₄ |
| Mol W. | : 1101.15 g/mol |
| Cas No. | : Not Available |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Lactose Adduct (N-lactoside)
| CAT No. | : CS-O-35442 |
| Mol F. | : C₂₇H₃₁I₄NO₁₄ |
| Mol W. | : 1101.15 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Lactose Adduct (O-lactoside)
| CAT No. | : CS-O-35443 |
| Mol F. | : C27H31I4NO14 |
| Mol W. | : 1101.15 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Monochloro Impurity
| CAT No. | : CS-O-16035 |
| Mol F. | : C₁₅H₁₁ClI₃NO₄ |
| Mol W. | : 685.42 g/mol |
| Cas No. | : 909279-46-5 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine N- formamide Impurity
| CAT No. | : CS-DN-00017 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE METABOLITES, METABOLITES
Levothyroxine N-Methylamide
| CAT No. | : CS-O-14502 |
| Mol F. | : C₁₆H₁₄I₄N₂O₃ |
| Mol W. | : 789.91 g/mol |
| Cas No. | : 2088032-52-2 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Related Compound 10
| CAT No. | : CS-P-08124 |
| Mol F. | : C₁₆H₁₅I₂NO₄ |
| Mol W. | : 539.10 g/mol |
| Cas No. | : 94345-95-6 |
| Stock | : IN-Stock |
THYROXINE API STANDARDS, API STANDARDS
Levothyroxine Sodium
| CAT No. | : CS-O-01770 |
| Mol F. | : C₁₅H₁₀I₄NNaO₄ |
| Mol W. | : 798.85 g/mol |
| Cas No. | : 55-03-8 |
| Stock | : IN-Stock |
THYROXINE USP STANDARDS, USP STANDARDS
Levothyroxine Sodium (1365065)
| CAT No. | : CS-EB-02783 |
| Mol F. | : C15H12I4NNaO5 |
| Mol W. | : 816.87 g/mol |
| Cas No. | : 25416-65-3 (hydrate) |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine Sodium EP Impurity J
| CAT No. | : CS-I-00089 |
| Mol F. | : C15H13I2NO4 |
| Mol W. | : 525 g/mol |
| Cas No. | : 70-40-6 |
| Stock | : IN-Stock |
THYROXINE API STANDARDS, API STANDARDS
Levothyroxine sodium Hydrate
| CAT No. | : CS-O-16243 |
| Mol F. | : C15H10I4NO4 : Na : 5(H2O) |
| Mol W. | : 798.9 : 23.0 : 5(18.0) g/mol |
| Cas No. | : 25416-65-3 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Levothyroxine-13C9-15N
| CAT No. | : CS-O-03203 |
| Mol F. | : C₆[₁C]₉H₁₁I₄[¹⁵N]O₄ |
| Mol W. | : 98.25 g/mol |
| Cas No. | : 1431868-11-9 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Levothyroxine-4-Lactose Maillard Impurity
| CAT No. | : CS-O-50307 |
| Mol F. | : C27H31I4NO14 |
| Mol W. | : 1101.15 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
L-Thyroxine 13C9,15N
| CAT No. | : CS-EK-01194 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 1435972-68-1 |
| Stock | : Enquire |
![L-Thyroxine-[L-Tyr-d5] hydrochloride](https://clearsynth.com/structure/L-Thyroxine--L-Tyr-d5--hydrochloride.png "Thyroxine")
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
L-Thyroxine-[L-Tyr-d5] hydrochloride
| CAT No. | : CS-I-00443 |
| Mol F. | : C15H7D5ClI4NO4 |
| Mol W. | : 818.36 g/mol |
| Cas No. | : 1261254-57-2 |
| Stock | : Enquire |
![L-Thyroxine-[L-Tyr-d5] hydrochloride (Solution)](https://clearsynth.com/structure/L-Thyroxine--L-Tyr-d5--hydrochloride--Solution-.png "Thyroxine")
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
L-Thyroxine-[L-Tyr-d5] hydrochloride (Solution)
| CAT No. | : CS-I-00554 |
| Mol F. | : C15H7D5ClI4NO4 |
| Mol W. | : 818.36 g/mol |
| Cas No. | : 1261254-57-2 |
| Stock | : Enquire |
![L-Thyroxine-[L-Tyr-ring-13C6] hydrochloride (Solution)](https://clearsynth.com/structure/L-Thyroxine--L-Tyr-ring-13C6--hydrochloride--Solution-.png "Thyroxine")
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
L-Thyroxine-[L-Tyr-ring-13C6] hydrochloride (Solution)
| CAT No. | : CS-I-00555 |
| Mol F. | : C913C6H12ClI4NO4 |
| Mol W. | : 819.29 g/mol |
| Cas No. | : 720710-30-5 |
| Stock | : Enquire |
THYROXINE BUILDING BLOCKS, BUILDING BLOCKS
N-(tert-Butyloxy)carbonyl-L-thyroxine
| CAT No. | : CS-T-09847 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 88404-22-2 |
| Stock | : Enquire |
THYROXINE BUILDING BLOCKS, BUILDING BLOCKS
N-(Trifluoroacetyl)-L-thyroxine Methyl Ester
| CAT No. | : CS-T-62342 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 906325-95-9 |
| Stock | : Enquire |
THYROXINE INTERMEDIATES, INTERMEDIATES
N-Acetyl L-Thyroxine
| CAT No. | : CS-T-01205 |
| Mol F. | : C₁₇H₁₃l₄NO₅ |
| Mol W. | : 818.91 g/mol |
| Cas No. | : 26041-51-0 |
| Stock | : IN-Stock |
THYROXINE METABOLITES, METABOLITES
N-Acetyl L-Thyroxine Ethyl Ester
| CAT No. | : CS-T-01207 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 30804-52-5 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
N-Acetyl L-Thyroxine-13C6
| CAT No. | : CS-T-97054 |
| Mol F. | : C1113C6H13I4NO5 |
| Mol W. | : 824.86 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
N-Acetyl L-Thyroxine-d3
| CAT No. | : CS-T-97053 |
| Mol F. | : C₁₇H₁₀D₃I₄NO₅ |
| Mol W. | : 821.93 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE INTERMEDIATES, INTERMEDIATES
N-Formyl Thyroxine
| CAT No. | : CS-T-24771 |
| Mol F. | : C16H11I4NO5 |
| Mol W. | : 804.9 g/mol |
| Cas No. | : 671235-41-9 |
| Stock | : IN-Stock |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
N-Formyl Thyroxine-13C6
| CAT No. | : CS-T-76633 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 1346604-89-4 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
O-(4-Hydroxy-3-iodophenyl) Levothyroxine
| CAT No. | : CS-EO-03977 |
| Mol F. | : C21H14I5NO5 |
| Mol W. | : 994.9 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE REAGENTS, REAGENTS
Thyroxine 13C12
| CAT No. | : CS-C-01512 |
| Mol F. | : C313C12H11I4NO4 |
| Mol W. | : 788.78 g/mol |
| Cas No. | : 1262750-40-2 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine 13C6
| CAT No. | : CS-O-14503 |
| Mol F. | : C913C6H11I4NO4 |
| Mol W. | : 782.83 g/mol |
| Cas No. | : 1217780-14-7 |
| Stock | : IN-Stock |
THYROXINE INTERMEDIATES, INTERMEDIATES
Thyroxine 4'-O-Sulfate
| CAT No. | : CS-T-44340 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 77074-49-8 |
| Stock | : Enquire |
THYROXINE GLUCURONIDES, GLUCURONIDES
Thyroxine 4'-O-β-D-Glucuronide
| CAT No. | : CS-T-62059 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 21462-56-6 |
| Stock | : Enquire |
THYROXINE GLUCURONIDES, GLUCURONIDES
Thyroxine Acyl-β-D-Glucuronide
| CAT No. | : CS-T-62057 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 909880-81-5 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Thyroxine Aminohexyl Ether Dihydrochloride
| CAT No. | : CS-T-86816 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 1797130-15-4 |
| Stock | : Enquire |
THYROXINE IMPURITIES, IMPURITIES
Thyroxine Aminopropyl Ether
| CAT No. | : CS-T-87342 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 1797884-40-2 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine Carboxy,a,ß,1,2,3,4,5,6-13C9,15N
| CAT No. | : CS-T-86223 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 720710-31-6 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine d5
| CAT No. | : CS-O-11342 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 1322878-34-1 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine Glucuronide-13C6 Disodium Salt
| CAT No. | : CS-T-102700 |
| Mol F. | : C1513C6H18I4NNaO10 |
| Mol W. | : 980.93 g/mol |
| Cas No. | : 21462-56-6( Unlabelled) (free acid) |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine Methyl Ester- 13C6
| CAT No. | : CS-T-99789 |
| Mol F. | : C10¹³C6H13I4NO4 |
| Mol W. | : 796.85 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |
THYROXINE API STANDARDS, API STANDARDS
Thyroxine sodium
| CAT No. | : CS-O-02455 |
| Mol F. | : C15H10I4NNaO4 |
| Mol W. | : 798.85 g/mol |
| Cas No. | : 55-03-7 |
| Stock | : IN-Stock |
THYROXINE IMPURITIES, IMPURITIES
Thyroxine sulfate
| CAT No. | : CS-O-41678 |
| Mol F. | : C15H11I4NO7S |
| Mol W. | : 856.93 g/mol |
| Cas No. | : 77074-49-8 |
| Stock | : Enquire |
![Thyroxine-[L-Tyr-ring-13C6] hydrochloride](https://clearsynth.com/structure/Thyroxine--L-Tyr-ring-13C6--hydrochloride.png "Thyroxine")
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
Thyroxine-[L-Tyr-ring-13C6] hydrochloride
| CAT No. | : CS-I-00424 |
| Mol F. | : C913C6H12ClI4NO4 |
| Mol W. | : 819.29 g/mol |
| Cas No. | : 720710-30-5 |
| Stock | : Enquire |
THYROXINE INTERMEDIATES, INTERMEDIATES
β-Hydroxy Thyroxine
| CAT No. | : CS-T-56505 |
| Mol F. | : Not Available |
| Mol W. | : Not Available |
| Cas No. | : 107849-54-7 |
| Stock | : Enquire |
THYROXINE STABLE ISOTOPES, STABLE ISOTOPES
β-Hydroxy Thyroxine-13C6
| CAT No. | : CS-T-96926 |
| Mol F. | : C913C6H11I4NO5 |
| Mol W. | : 798.83 g/mol |
| Cas No. | : Not Available |
| Stock | : Enquire |