Levothyroxine Impurities

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Impurity structure Parent Drug Name Name of Impurity Catalogue No. CAS No.
Levothyroxin Impurity 10 Levothyroxine

Levothyroxin Impurity 10

VL1320027 909279-46-5
Levothyroxin Impurity 30 (Sodium Salt) Levothyroxine

Levothyroxin Impurity 30 (Sodium Salt)

VL1320028 N/A
Levothyroxine Acetamide Impurity Levothyroxine

Levothyroxine Acetamide Impurity

VL1320002 176258-88-1
Levothyroxine Beta Hydroxy Levothyroxine

Levothyroxine Beta Hydroxy

VL1320008 107849-54-7
Levothyroxine EP Impurity A Levothyroxine

Levothyroxine EP Impurity A

VL1320016 2/3/6893
Levothyroxine EP Impurity A (Na salt) Levothyroxine

Levothyroxine EP Impurity A (Na salt)

VE007842 55-06-1
Levothyroxine EP Impurity B Levothyroxine

Levothyroxine EP Impurity B

VL1320012 1628720-66-0
Levothyroxine EP Impurity C Levothyroxine

Levothyroxine EP Impurity C

VL1320009 51-24-1
Levothyroxine EP Impurity D Levothyroxine

Levothyroxine EP Impurity D

VL1320019 67-30-1
Levothyroxine EP Impurity E Levothyroxine

Levothyroxine EP Impurity E

VL1320021 1041-01-06
Levothyroxine EP Impurity F Levothyroxine

Levothyroxine EP Impurity F

VL1320011 911661-90-0
Levothyroxine EP Impurity H Levothyroxine

Levothyroxine EP Impurity H

VL1320003 2055-97-2
Levothyroxine EP Impurity I Levothyroxine

Levothyroxine EP Impurity I

VL1320001 2016-06-0
Levothyroxine EP Impurity J Levothyroxine

Levothyroxine EP Impurity J

VL1320005 4604-41-5
Levothyroxine EP Impurity J Levothyroxine

Levothyroxine EP Impurity J

VE0016040 N/A
Levothyroxine EP Impurity K Levothyroxine

Levothyroxine EP Impurity K

VL1320013 5817-39-0
Levothyroxine EP Impurity K (R-Isomer) Levothyroxine

Levothyroxine EP Impurity K (R-Isomer)

VE0016044 66701-15-3
Levothyroxine Ethyl Ester Levothyroxine

Levothyroxine Ethyl Ester

VL1320022 76353-71-4
Budesonide for System Suitability CRS (Y0001148) Levothyroxine

Levothyroxine for Peak Identification CRS (Y0001382)

PVE00256 N/A
Levothyroxine Impurity 11 Levothyroxine

Levothyroxine Impurity 11

VE0011482 1155-40-4
Levothyroxine Impurity 12 Levothyroxine

Levothyroxine Impurity 12

VE0016029 176258-89-2
Levothyroxine Impurity 14 Levothyroxine

Levothyroxine Impurity 14

VE0016030 854646-83-6
Levothyroxine Impurity 15 Levothyroxine

Levothyroxine Impurity 15

VE0016031 N/A
Levothyroxine Impurity 16 Levothyroxine

Levothyroxine Impurity 16

VE0016032 3006-01-7
Levothyroxine Impurity 17 Levothyroxine

Levothyroxine Impurity 17

VE0016034 3914-31-6
Levothyroxine Impurity 18 Levothyroxine

Levothyroxine Impurity 18

VE0016035 N/A
Levothyroxine Impurity 29 Levothyroxine

Levothyroxine Impurity 29

VE0016036 2055-94-9
Levothyroxine Impurity 53 (Mixture of Diastereomers) Levothyroxine

Levothyroxine Impurity 53 (Mixture of Diastereomers)

VE0016037 N/A
Levothyroxine Impurity 58 Levothyroxine

Levothyroxine Impurity 58

VE0016038 176258-87-0
Levothyroxine Impurity 62 (Mixture of Diastereomers) Levothyroxine

Levothyroxine Impurity 62 (Mixture of Diastereomers)

VE0016039 N/A
Levothyroxine Impurity 67 Levothyroxine

Levothyroxine Impurity 67

VE0016023 56460-41-4
Levothyroxine Impurity 68 Levothyroxine

Levothyroxine Impurity 68

VE0016025 886203-79-8
Levothyroxine Impurity 69 Levothyroxine

Levothyroxine Impurity 69

VE0016026 N/A
Levothyroxine Impurity 70 Levothyroxine

Levothyroxine Impurity 70

VE0016028 N/A
Levothyroxine Lactose Adduct Levothyroxine

Levothyroxine Lactose Adduct

VL1320033 N/A
Levothyroxine N-Acetyl Impurity Levothyroxine

Levothyroxine N-Acetyl Impurity

VL1320015 26041-51-0
Levothyroxine N-Formyl Impurity Levothyroxine

Levothyroxine N-Formyl Impurity

VL1320014 671235-41-9
Levothyroxine N-Methylamide Levothyroxine

Levothyroxine N-Methylamide

VL1320017 2088032-52-2
Levothyroxine N-Methylamine Levothyroxine

Levothyroxine N-Methylamine

VE0016019 N/A
Levothyroxine O-Methyl Impurity Levothyroxine

Levothyroxine O-Methyl Impurity

VL1320007 N/A
Levothyroxine Related Compound Levothyroxine

Levothyroxine Related Compound

VE0016017 153324-21-1
Levothyroxine Related Compound 10 Levothyroxine

Levothyroxine Related Compound 10

VE0016027 94345-95-6
Levothyroxine T4 Amine O-Methyl Levothyroxine

Levothyroxine T4 Amine O-Methyl

VL1320018 2230724-39-5
Levothyroxine T4-Formic Acid N-Methyl Amide Levothyroxine

Levothyroxine T4-Formic Acid N-Methyl Amide

VL1320020 2088032-78-2
Levothyroxine T4-Hydroxyacetic Acid Impurity Levothyroxine

Levothyroxine T4-Hydroxyacetic Acid Impurity

VL1320010 93647-48-4
Budesonide for System Suitability CRS (Y0001148) Levothyroxine

Levothyroxine Unknown Impurity at RRT 1.2

VE0015161 55-03-8
N-Acetyl-3,5-diiodo-L-tyrosine Levothyroxine

N-Acetyl-3,5-diiodo-L-tyrosine

VE0016021 1027-28-7
rac-Levothyroxine EP Impurity J Levothyroxine

rac-Levothyroxine EP Impurity J

VE0016041 2668306-64-5
rac-Levothyroxine EP Impurity J Levothyroxine

rac-Levothyroxine EP Impurity J

VE0016043 70-40-6
rac-Levothyroxine Impurity 22 Levothyroxine

rac-Levothyroxine Impurity 22

VE0016057 2512209-79-7