Levothyroxine

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Pharmaceutical Reference Standards

Levothyroxine

CAT. No.	CP-L18000
CAS. No.	51-48-9
Mol. F.	C15H11I4NO4
Mol. Wt.	776.87
Stock Status:	In Stock

Rel. Cas No: 55-03-8 (Na salt) ; 6106-07-6 (sodium pentahydrate)

Levothyroxine EP Impurity A

CAT. No.	CP-L18001
CAS. No.	55-06-1
Mol. F.	C15H11I3NNaO4
Mol. Wt.	672.96
Stock Status:	In Stock

Rel. Cas No: 6893-02-3 (free base)

Levothyroxine EP Impurity B

CAT. No.	CP-L18002
CAS. No.	1628720-66-0
Mol. F.	C15H11ClI3NO4
Mol. Wt.	685.4
Stock Status:	Custom Synthesis

Levothyroxine EP Impurity C

CAT. No.	CP-L18003
CAS. No.	51-24-1
Mol. F.	C14H9I3O4
Mol. Wt.	621.93
Stock Status:	In Stock

Levothyroxine EP Impurity D

CAT. No.	CP-L18004
CAS. No.	67-30-1
Mol. F.	C14H8I4O4
Mol. Wt.	747.82
Stock Status:	In Stock

Levothyroxine EP Impurity E

CAT. No.	CP-L18005
CAS. No.	1041-01-6
Mol. F.	C15H13I2NO4
Mol. Wt.	525.08
Stock Status:	Custom Synthesis

Levothyroxine EP Impurity F

CAT. No.	CP-L18006
CAS. No.	911661-90-0
Mol. F.	C21H13I6NO5
Mol. Wt.	1120.76
Stock Status:	In Stock

Levothyroxine EP Impurity G

CAT. No.	CP-L18007
CAS. No.	2230724-39-5
Mol. F.	C15H13I4NO2
Mol. Wt.	746.89
Stock Status:	In Stock

Levothyroxine EP Impurity H

CAT. No.	CP-L18008
CAS. No.	2055-97-2
Mol. F.	C13H6I4O4
Mol. Wt.	733.80
Stock Status:	In Stock

Levothyroxine EP Impurity I

CAT. No.	CP-L18009
CAS. No.	2016-06-0
Mol. F.	C13H6I4O3
Mol. Wt.	717.8
Stock Status:	In Stock

Levothyroxine EP Impurity J

CAT. No.	CP-L18010
CAS. No.	4604-41-5
Mol. F.	C15H13I2NO4
Mol. Wt.	525.1
Stock Status:	Custom Synthesis

Levothyroxine EP Impurity K

CAT. No.	CP-L18011
CAS. No.	5817-39-0
Mol. F.	C15H12I3NO4
Mol. Wt.	650.9
Stock Status:	Custom Synthesis

Levothyroxine N-Formyl Impurity

CAT. No.	CP-L18013
CAS. No.	671235-41-9
Mol. F.	C16H11I4NO5
Mol. Wt.	804.88
Stock Status:	In Stock

Levothyroxine N-Acetyl Impurity

CAT. No.	CP-L18014
CAS. No.	26041-51-0
Mol. F.	C17H13I4NO5
Mol. Wt.	818.91
Stock Status:	In Stock

Levothyroxine T4-Acetamide

CAT. No.	CP-L18016
CAS. No.	176258-88-1
Mol. F.	C14H9I4NO3
Mol. Wt.	746.84
Stock Status:	In Stock

Levothyroxine N-Methylamide

CAT. No.	CP-L18017
CAS. No.	2088032-52-2
Mol. F.	C16H14I4N2O3
Mol. Wt.	789.91
Stock Status:	In Stock

Levothyroxine-lactose maillard impurity

CAT. No.	CP-L18020
CAS. No.	NA
Mol. F.	C27H31I4NO14
Mol. Wt.	1101.16
Stock Status:	In Stock

β-Hydroxy Thyroxine

CAT. No.	CP-L18021
CAS. No.	107849-54-7
Mol. F.	C15H11I4NO5
Mol. Wt.	792.87
Stock Status:	In Stock

Levothyroxine Methyl Ester

CAT. No.	CP-L18022
CAS. No.	32180-11-3
Mol. F.	C16H13I4NO4
Mol. Wt.	790.90
Stock Status:	In Stock

Levothyroxine Hydroxyphenoxy Aldehyde Impurity

CAT. No.	CP-L18023
CAS. No.	2828-49-1
Mol. F.	C13H8I2O3
Mol. Wt.	466.01
Stock Status:	Custom Synthesis

Levothyroxine Methoxyphenoxy Aldehyde Impurity

CAT. No.	CP-L18024
CAS. No.	69240-57-9
Mol. F.	C14H10I2O3
Mol. Wt.	480.04
Stock Status:	Custom Synthesis

Levothyroxine Monochloro Impurity

CAT. No.	CP-L18025
CAS. No.	909279-46-5
Mol. F.	C15H11ClI3NO4
Mol. Wt.	685.42
Stock Status:	Custom Synthesis

Levothyroxine Glucose Adduct

CAT. No.	CP-L18026
CAS. No.	NA
Mol. F.	C21H21I4NO9
Mol. Wt.	939.01
Stock Status:	Custom Synthesis

Levothyroxine Mannitol Adduct

CAT. No.	CP-L18028
CAS. No.	NA
Mol. F.	C21H23I4NO9
Mol. Wt.	941.03
Stock Status:	Custom Synthesis

Levothyroxine Lactose Adduct

CAT. No.	CP-L18029
CAS. No.	NA
Mol. F.	C27H32I3NO14
Mol. Wt.	975.3
Stock Status:	Custom Synthesis

Levothyroxine Impurity 9

CAT. No.	CP-L18030
CAS. No.	3861-58-3
Mol. F.	C7H4INO4
Mol. Wt.	293.02
Stock Status:	Custom Synthesis

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

CAT. No.	CP-L18031
CAS. No.	7069-47-8
Mol. F.	C15H10I4O5
Mol. Wt.	777.86
Stock Status:	Custom Synthesis

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

CAT. No.	CP-L18032
CAS. No.	94345-95-6
Mol. F.	C16H15I2NO4
Mol. Wt.	539.11
Stock Status:	Custom Synthesis

T4-Formic acid N-methylamide

CAT. No.	CP-L18033
CAS. No.	2088032-78-2
Mol. F.	C14H9I4NO3
Mol. Wt.	746.85
Stock Status:	Custom Synthesis

N-Acetyl L-thyroxine ethyl ester

CAT. No.	CP-L18034
CAS. No.	30804-52-5
Mol. F.	C19H17I4NO5
Mol. Wt.	846.96
Stock Status:	Custom Synthesis

N-ethylamide Levothyroxine

CAT. No.	CP-L18035
CAS. No.	NA
Mol. F.	C17H16I4N2O3
Mol. Wt.	803.73
Stock Status:	In Stock

Levothyroxine sodium butyl ester impurity

CAT. No.	CP-L18036
CAS. No.	NA
Mol. F.	C20H19I4O4 : Na
Mol. Wt.	830.99 : 23.0
Stock Status:	In Stock

Levothyroxine Sodium

CAT. No.	CP-L18037
CAS. No.	55-03-8
Mol. F.	C15H10I4NO4 : Na
Mol. Wt.	775.87 : 23.0
Stock Status:	Custom Synthesis

Rel. Cas No: 51-48-9 (free base) ; 6106-07-6 (sodium pentahydrate)

Levothyroxine Sodium Hydrate

CAT. No.	CP-L18038
CAS. No.	25416-65-3
Mol. F.	C15H10I4NO4 : Na : x(H2O)
Mol. Wt.	775.9 : 23.0 : x(18.0)
Stock Status:	Custom Synthesis

Rel. Cas No: 51-48-9 (free base) : 55-03-8 (Na salt)

Levothyroxine T4-Hydroxyacetic Acid

CAT. No.	CP-L18039
CAS. No.	93647-48-4
Mol. F.	C14H8I4O5
Mol. Wt.	763.8
Stock Status:	Custom Synthesis

Levothyroxine Ethyl Ester

CAT. No.	CP-L18040
CAS. No.	76353-71-4
Mol. F.	C17H15I4NO4
Mol. Wt.	804.9
Stock Status:	Custom Synthesis

Levothyroxine D-Isomer

CAT. No.	CP-L18041
CAS. No.	51-49-0
Mol. F.	C15H11I4NO4
Mol. Wt.	776.9
Stock Status:	Custom Synthesis

Levothyroxine Impurity 1

CAT. No.	CP-L18042
CAS. No.	2055-94-9
Mol. F.	C13H8I4O3
Mol. Wt.	719.8
Stock Status:	Custom Synthesis

Levothyroxine Impurity 2

CAT. No.	CP-L18043
CAS. No.	176258-89-2
Mol. F.	C14H10I4O2
Mol. Wt.	717.9
Stock Status:	Custom Synthesis

Levothyroxine Impurity 3

CAT. No.	CP-L18044
CAS. No.	854646-83-6
Mol. F.	C8H7I2NO3
Mol. Wt.	419
Stock Status:	Custom Synthesis

Levothyroxine Impurity 5

CAT. No.	CP-L18045
CAS. No.	51-26-3
Mol. F.	C15H11I3O4
Mol. Wt.	636
Stock Status:	Custom Synthesis

Levothyroxine Impurity 6

CAT. No.	CP-L18046
CAS. No.	105172-64-3
Mol. F.	C15H11I3N2O6
Mol. Wt.	696
Stock Status:	Custom Synthesis

3-Bromo-L-Thyroxine

CAT. No.	CP-L18047
CAS. No.	1798894-90-2
Mol. F.	C15H11BrI3NO4
Mol. Wt.	729.9
Stock Status:	Custom Synthesis

3,5-Dichloro-L-Tyrosine

CAT. No.	CP-L18048
CAS. No.	15106-62-4
Mol. F.	C9H9Cl2NO3
Mol. Wt.	250.1
Stock Status:	Custom Synthesis

3,5-Dibromo-L-Tyrosine

CAT. No.	CP-L18049
CAS. No.	300-38-9
Mol. F.	C9H9Br2NO3
Mol. Wt.	339
Stock Status:	Custom Synthesis

Thyroxamine

CAT. No.	CP-L18050
CAS. No.	3571-49-1
Mol. F.	C14H11I4NO2
Mol. Wt.	732.9
Stock Status:	Custom Synthesis

3-Monoiodothyronine

CAT. No.	CP-L18051
CAS. No.	16170-92-6
Mol. F.	C15H14INO4
Mol. Wt.	399.2
Stock Status:	Custom Synthesis

Levothyroxine Impurity 11

CAT. No.	CP-L18052
CAS. No.	2244907-74-0
Mol. F.	C13H12IO2 : CF3O3S
Mol. Wt.	327.1 : 149.1
Stock Status:	Custom Synthesis

Rel. Cas No: 167998-35-8 (free base)

Levothyroxine Impurity 12

CAT. No.	CP-L18053
CAS. No.	889871-36-7
Mol. F.	C9H9ClINO3
Mol. Wt.	341.5
Stock Status:	Custom Synthesis

Levothyroxine Impurity 13

CAT. No.	CP-L18054
CAS. No.	77667-01-7
Mol. F.	C15H11BrI3NO4
Mol. Wt.	729.9
Stock Status:	Custom Synthesis

Levothyroxine Impurity 14

CAT. No.	CP-L18055
CAS. No.	2088032-62-4
Mol. F.	C30H21I7N2O8
Mol. Wt.	1425.8
Stock Status:	Custom Synthesis

3,3’,5-Triiodo-D-thyronine

CAT. No.	CP-L18056
CAS. No.	5714-08-9
Mol. F.	C15H12I3NO4
Mol. Wt.	651
Stock Status:	Custom Synthesis

Levothyroxine Impurity 16

CAT. No.	CP-L18057
CAS. No.	92905-78-7
Mol. F.	C14H10I3NO3
Mol. Wt.	621
Stock Status:	Custom Synthesis

O-(4-Hydroxy-3-iodophenyl) Levothyroxine

CAT. No.	CP-L18058
CAS. No.	2086274-34-0
Mol. F.	C21H14I5NO5
Mol. Wt.	994.9
Stock Status:	Custom Synthesis

a b c d e f g h i j k l m n o p q r s t u v w x y z

Levothyroxine

Pharmaceutical Reference Standards

Levothyroxine

Levothyroxine EP Impurity A

Levothyroxine EP Impurity B

Levothyroxine EP Impurity C

Levothyroxine EP Impurity D

Levothyroxine EP Impurity E

Levothyroxine EP Impurity F

Levothyroxine EP Impurity G

Levothyroxine EP Impurity H

Levothyroxine EP Impurity I

Levothyroxine EP Impurity J

Levothyroxine EP Impurity K

Levothyroxine N-Formyl Impurity

Levothyroxine N-Acetyl Impurity

Levothyroxine T4-Acetamide

Levothyroxine N-Methylamide

Levothyroxine-lactose maillard impurity

β-Hydroxy Thyroxine

Levothyroxine Methyl Ester

Levothyroxine Hydroxyphenoxy Aldehyde Impurity

Levothyroxine Methoxyphenoxy Aldehyde Impurity

Levothyroxine Monochloro Impurity

Levothyroxine Glucose Adduct

Levothyroxine Mannitol Adduct

Levothyroxine Lactose Adduct

Levothyroxine Impurity 9

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

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

T4-Formic acid N-methylamide

N-Acetyl L-thyroxine ethyl ester

N-ethylamide Levothyroxine

Levothyroxine sodium butyl ester impurity

Levothyroxine Sodium

Levothyroxine Sodium Hydrate

Levothyroxine T4-Hydroxyacetic Acid

Levothyroxine Ethyl Ester

Levothyroxine D-Isomer

Levothyroxine Impurity 1

Levothyroxine Impurity 2

Levothyroxine Impurity 3

Levothyroxine Impurity 5

Levothyroxine Impurity 6

3-Bromo-L-Thyroxine

3,5-Dichloro-L-Tyrosine

3,5-Dibromo-L-Tyrosine

Thyroxamine

3-Monoiodothyronine

Levothyroxine Impurity 11

Levothyroxine Impurity 12

Levothyroxine Impurity 13

Levothyroxine Impurity 14

3,3’,5-Triiodo-D-thyronine

Levothyroxine Impurity 16

O-(4-Hydroxy-3-iodophenyl) Levothyroxine