Fragment 176-191
Synthetic 16-residue peptide supplied by Loti Labs as lyophilized powder for laboratory research. Specifications, the current certificate of analysis and the full batch history, all on one page.
Fragment 176-191 2MG. For laboratory, analytical and research use only.Compound specifications
| Compound | Fragment 176-191 |
| Class | Synthetic 16-residue peptide |
| Sequence | YLRIVQCRSVEGSCGF |
| Molecular formula | C78H123N23O23S2 |
| Molecular weight | 1815.1 g/mol |
| CAS number | 221231-10-3 |
| Form | Lyophilized powder, sealed vial |
| Formats | 2 mg vial |
Latest certificates of analysis
2 mg vial
Batch history
| Test date | Format | Batch | Purity | Identity | Laboratory | |
|---|---|---|---|---|---|---|
| Feb 4, 2026 | 2 mg vial | LLFRG226 | 99.82% | 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 Fragment 176-191 batch?
2 mg vial: batch LLFRG226 tested at 99.82% purity by HPLC on Feb 4, 2026, identity confirmed by mass spectrometry.
What is the molecular formula and weight of Fragment 176-191?
Fragment 176-191 has the sequence YLRIVQCRSVEGSCGF, molecular formula C78H123N23O23S2 and a molecular weight of 1815.1 g/mol, CAS 221231-10-3.
How do I find the certificate for my vial?
Match the lot number printed on the vial 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 Fragment 176-191 from Loti Labs intended for?
Loti Labs supplies Fragment 176-191 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
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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.