Impurity reference standards
Levothyroxine impurities & reference standards
Characterised Levothyroxine impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
64reference materials
COAHPLC · NMR · MS on request
Parent API: Levothyroxine WS
51-48-9 · C15H11I4NO4
4-(4-Ethyl-2,6-diiodophenoxy)-2,6-diiodo-phenol
- CAS
- 176258-89-2
- Formula
- C14H10I4O2
- MW
- 717.84 g/mol
VQ-043506
4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-benzenemethanol
- CAS
- 2055-94-9
- Formula
- C13H8I4O3
- MW
- 719.82 g/mol
VQ-026459
a-Amino-4-hydroxy-3,5-diiodo-benzeneacetic Acid
- CAS
- 854646-83-6
- Formula
- C8H7I2NO3
- MW
- 418.95 g/mol
VQ-034968
FAQs — Levothyroxine impurities
Which Levothyroxine impurities do you supply?
We list 64 Levothyroxine-related reference materials, including process impurities, degradation products and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Levothyroxine impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Levothyroxine impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Levothyroxine impurity standards
We reply within one business day with price, pack options, lead time and documentation.