Research compound reference
BPC-157
BPC-157 is a synthetic linear peptide of 15 amino acids. The material is a lyophilized (freeze-dried) solid of 99% or greater purity by HPLC, with a lot-specific Certificate of Analysis, for in vitro laboratory research. This page is a technical reference to the material's identity, chemistry, analytical testing and laboratory handling.
For research use only. Not for human or veterinary, diagnostic or therapeutic use.
The sequence, residue by residue
Fifteen L-amino acids in a single unbranched chain, read from the free amino end (N-terminus) to the free carboxylic acid end (C-terminus).1
H-GEPPPGKPADDAGLV-OH
What is BPC-157?
BPC-157 is a pentadecapeptide: one chain of 15 amino acids joined by peptide bonds, with no disulfide bridges, branches or modified residues. It is catalogued under CAS 137525-51-0 and PubChem CID 9941957, with the molecular formula C62H98N16O22 and a molecular weight of 1419.5 g/mol.1
The material described on this page is a synthetic peptide intended as a laboratory reagent.
Composition
Four of the 15 residues are proline (positions 3, 4, 5 and 8), including a run of three. The remainder are glycine (3), alanine (2), aspartic acid (2), and one each of glutamic acid, lysine, leucine and valine. Three side chains carry a carboxylic acid group and one carries an amine, so the peptide carries a calculated net charge of about minus two at pH 7.
The sequence contains no cysteine, methionine or tryptophan, the residues most prone to air oxidation in peptides, and no asparagine or glutamine.3
Free peptide and salt forms
The formula and molecular weight above describe the free peptide. Synthetic peptides are often isolated as salts, which adds counter-ion mass. The acetate salt of BPC-157, for example, is registered under a separate CAS number, 1628202-19-6.2 This is why formula weights can differ slightly between suppliers.
Handling
BPC-157 is a dry solid as received in the laboratory. General handling guidance for lyophilized peptides applies.3
Storage and stability
| State | Temperature | Notes |
|---|---|---|
| Dry, sealed | -20 °C, or preferably -80 °C3 | Keep dry and away from bright light. Moisture lowers long-term stability.3 |
| Freezing and thawing | Avoid repeated freezing and thawing | Applies to the dry solid.3 |
Cayman Chemical lists -20 °C as the storage temperature for its solid BPC-157 (acetate).2
How each lot is tested
Each lot is tested by an independent third-party laboratory.4 The BPC-157 certificate page names the testing laboratories and lists each lot's purity, net content and test date. Three measurements are reported.
Identity
Mass spectrometry
Checks that the measured molecular mass matches BPC-157. The calculated monoisotopic mass is 1418.70 Da.1
A matching mass is consistent with the expected composition. It does not confirm the order of residues.
Purity
High-performance liquid chromatography (HPLC)
Separates the peptide from synthesis-related impurities. Purity is reported as the main peak's share of the total detected signal.
Reported per lot. The Oasis Labs specification is 99% or greater.
Quantity
Net peptide content
Measures the mass of peptide actually present in the sample tested.
Reported per lot on the Certificate of Analysis.
Technical notes
What does the Certificate of Analysis confirm?
Identity by mass spectrometry, purity by HPLC, and the net peptide content of the sample. Mass spectrometry confirms molecular mass, not the order of residues.
Why do molecular weights for BPC-157 differ slightly between sources?
The figure of 1419.5 g/mol is for the free peptide. Salt forms, such as the acetate, carry extra counter-ion mass and have their own CAS number.
Why is the material freeze-dried?
Peptides are most stable as dry solids. Moisture reduces long-term stability, so the material is lyophilized and kept sealed until use in the laboratory.
BPC-157 lot certificates
Each listed BPC-157 lot has its own certificate covering identity, purity and net peptide content.
Catalogue entry: BPC-157
More from the research reference
References
- National Center for Biotechnology Information. PubChem Compound Summary for CID 9941957, BPC-157. pubchem.ncbi.nlm.nih.gov/compound/9941957. Accessed 14 October 2026.
- Cayman Chemical. BPC 157 (acetate), Item No. 30989, product information. caymanchem.com/product/30989. Accessed 14 October 2026.
- MilliporeSigma (Merck KGaA). Handling and storage guidelines for peptides and proteins (technical article). merckmillipore.com. Accessed 14 October 2026.
- Oasis Labs. BPC-157 Certificate of Analysis page, lot data and testing laboratories, myoasislabs.com/coa/bpc-157/, and testing methodology, myoasislabs.com/coa-process/.
References document the chemical identity, analytical characterisation and handling of this material. Molecular composition and the calculated net charge are derived from the published sequence.