Impurity reference standards
Levothyroxine impurity standards
47 characterised compounds linked to Levothyroxine are catalogued here, from named pharmacopoeial impurities to synthesis intermediates and breakdown products. Highlights of the range are 16 pharmacopoeial impurities and 3 metabolites or hydroxylated analogues.
47reference materials
16pharmacopoeial
3metabolites
Batches are supplied with a certificate of analysis, and the supporting spectra can be sent ahead of a purchase order so your QA team can review them. Typical uses are method development and validation, relative response factor work, forced degradation studies and the impurity sections of ANDA, DMF or CEP filings.
By impurity type
Pharmacopoeial16EP, USP, BP or JP named impurities
Metabolites3Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Levothyroxine reference materials
1–47 of 47 standards
4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-benzenemethanol
- CAS
- 2055-94-9
- Formula
- C13H8I4O3
- MW
- 719.82 g/mol
ZX-025392
Questions
Levothyroxine impurities, answered
How many Levothyroxine impurity standards does Zemixal list?
The catalogue currently lists 47 compounds for Levothyroxine, including 16 pharmacopoeial impurities and 3 metabolites or hydroxylated analogues. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Levothyroxine impurity standard?
A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.
Can Zemixal make a Levothyroxine impurity that is not listed?
Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.