Fragment 176-191
Synthetic 16-residue peptide. Loti Labs supplies it as lyophilized powder in 2 mg vials, for laboratory research.
Specifications
Reference dataFormula, molecular weight and CAS number are reference values for the compound, not measurements of a specific batch.
- Compound
- Fragment 176-191
- Class
- Synthetic 16-residue peptide
- Molecular formula
- C78H123N23O23S2
- Physical presentation
- Lyophilized powder, sealed vial
- Formats
- 2 mg vial
- Sequence
- YLRIVQCRSVEGSCGF
Current certificates of analysis
TipMatch the batch number on your vial label to the certificate. Click any certificate to open it full size.
2 mg vial
Batch LLFRG226 tested at 99.82% purity by HPLC. Identity was found to conform by mass spectrometry.
- Batch
- LLFRG226
- Tested
- Feb 4, 2026
- Laboratory
- SR Bio Labs
Batch history
RecordEvery certificate stays on record under its batch number, even after a newer batch arrives.
| Tested | Format | Batch | Purity | Identity | Laboratory | |
|---|---|---|---|---|---|---|
| Feb 4, 2026 | 2 mg vial | LLFRG226 | 99.82% | Conforms | SR Bio Labs | Certificate |
How every batch is tested
MethodEvery Loti Labs batch goes to an independent, U.S.-based third-party laboratory.
- 1
Sample sent
Samples from the production batch go to the laboratory under the batch number.
- 2
Purity
HPLC separates sample components and can be used to assess chromatographic purity. Determining absolute compound content requires a validated quantitative assay.
- 3
Identity
Mass spectrometry provides evidence supporting compound identity, where reported.
- 4
Archived
The certificate is published and kept for good. Search the archive.
Questions researchers ask
ArchiveEvery certificate we have published is searchable in the COA archive.
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.
Further reading on Fragment 176-191
Related compound profiles
Ordering is open 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.