T4
Levothyroxine supplied by Loti Labs as a research liquid for laboratory research. Specifications, the current certificate of analysis and the full batch history, all on one page.
T4 (Levothyroxine) 400mcg/ml (30ml). For laboratory, analytical and research use only.Compound specifications
| Compound | Levothyroxine (T4) |
| Class | Levothyroxine |
| Molecular formula | C15H11I4NO4 |
| Molecular weight | 776.9 g/mol |
| CAS number | 51-48-9 |
| Form | Research liquid, 30 mL bottle |
| Formats | 400 mcg/mL liquid, 30 mL |
Latest certificates of analysis
400 mcg/mL liquid, 30 mL
Batch history
| Test date | Format | Batch | Purity | Identity | Laboratory | |
|---|---|---|---|---|---|---|
| Mar 21, 2026 | 400 mcg/mL liquid, 30 mL | LLT4326 | 99.62% | Conforms | SR Bio Labs | Certificate |
How every batch is tested
Every Loti Labs batch is tested by an independent, U.S.-based third-party laboratory. Purity is measured by HPLC and identity is confirmed by mass spectrometry. Where a certificate includes an endotoxin screen, the result is shown above. Each certificate is archived permanently under its batch number, so earlier batches stay on record after a new one arrives. Search the complete COA archive.
Questions researchers ask
What purity is the current T4 batch?
400 mcg/mL liquid, 30 mL: batch LLT4326 tested at 99.62% purity by HPLC on Mar 21, 2026, identity confirmed by mass spectrometry.
What is the molecular formula and weight of T4?
T4 has molecular formula C15H11I4NO4 and a molecular weight of 776.9 g/mol, CAS 51-48-9.
How do I find the certificate for my bottle?
Match the lot number printed on the bottle label to the batch column in the history table, or search it in the Loti Labs COA archive. Every certificate is kept permanently under its batch number.
What is T4 from Loti Labs intended for?
Loti Labs supplies T4 strictly for laboratory, analytical and research use. It is not for human or veterinary use, and it is not a drug, food or cosmetic.
Available to registered researchers
Ordering opens after you sign in or create a free research account.
RESEARCH USE ONLY. This page is provided for laboratory, analytical and research reference. Products are not drugs, foods or cosmetics and are not for human or veterinary use.