AssayIndex

BCH-2603-L7657

BPC-157 · 5 mg declared · Bachem Holding (Suzhou) Co., Ltd. · manufactured 03 Mar 2026

CHARACTERISED
Lot code
BCH-2603-L7657
Supplier
BCH — Bachem Holding (Suzhou) Co., Ltd.
Compound
BPC-157
Compound class
Tissue-repair and immunomodulatory peptides
Declared label claim
5mg
Manufacture date
03 Mar 2026
Index quarter
2026-Q3
Independent assays
10
Laboratories involved
Janoshik, Medutest, Kestrel, PeptideMeter, VendorInvestigate
Provenance mix
Buyer-sourced ×9 · Supplier-supplied ×1
Section 1

Reproducibility across independent tests

Every report below is an observation of the same physical material. What they disagree about is measurement; what they agree about is the lot. The size of the disagreement is compared against what the contributing laboratories' own repeatability figures predict.

Independent assays 10
Median purity 97.89% n=10
Spread (max − min) 1.79pp n=10
Standard deviation 0.480pp n=10
97.097.598.098.699.199.6100.1This lot (BCH-2603-L7657)This lot (BCH-2603-L7657): Q1 97.75, median 97.89, Q3 97.95, n=10outlier 97.19outlier 97.37outlier 98.98n=10All BPC-157All BPC-157: Q1 98.69, median 99.24, Q3 99.71, n=638n=638 Purity (% area)
Figure 1. This lot's independent purity results against the whole BPC-157 record set in the index. The vertical line is the index acceptance specification for the tissue-repair and immunomodulatory peptides class, 98.0 % area. A narrow box on the top row against a wide box on the bottom row is the ideal reading: it means the disagreement between lots is much larger than the disagreement within this one.
Section 2

Member reports 10

Every report the index holds on this lot. Each is a page carrying its own chromatogram, mass spectrum, mass balance, provenance and caveats.

ReportLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-043643BCH-2603-L7657Janoshik2026-Q397.835.11Buyer-sourced0FAIL
AX-2026-043644BCH-2603-L7657Medutest2026-Q397.765.74Buyer-sourced1FAIL
AX-2026-043645BCH-2603-L7657Kestrel2026-Q398.985.38Supplier-supplied1MARGINAL
AX-2026-043646BCH-2603-L7657PeptideMeter2026-Q397.955.37Buyer-sourced0FAIL
AX-2026-043647BCH-2603-L7657VendorInvestigate2026-Q397.375.5896.8Buyer-sourced0FAIL
AX-2026-043648BCH-2603-L7657PeptideMeter2026-Q397.956.0595.5Buyer-sourced0FAIL
AX-2026-043649BCH-2603-L7657PeptideMeter2026-Q397.195.2194.8Buyer-sourced0FAIL
AX-2026-043650BCH-2603-L7657Janoshik2026-Q398.154.81107.3Buyer-sourced0PASS
AX-2026-043651BCH-2603-L7657PeptideMeter2026-Q397.955.2195.3Buyer-sourced1FAIL
AX-2026-043652BCH-2603-L7657Janoshik2026-Q397.745.54105.2Buyer-sourced0FAIL
Section 3

By laboratory

Where more than one laboratory assayed this lot, the difference between them is a paired observation of their relative bias — the same material, the same time window, different instruments. Those pairs are what the index's bias estimates are built from.

LaboratoryReportsPurity results (% area)MedianGradientPublished bias (pp)Bias-adjusted
Janoshik397.83, 98.15, 97.7497.8330min+0.0097.83
Medutest197.7697.7625min+0.0897.68
Kestrel198.9898.9815min+0.2498.74
PeptideMeter497.95, 97.95, 97.19, 97.9597.9528min-0.0598.00
VendorInvestigate197.3797.3732min-0.1197.48

This lot contributes 10 paired comparisons to the inter-lab analysis.

Section 4

The supplier's certificate for this lot

One number the supplier wrote, beside the median of the numbers other people measured on the same physical material. That comparison is only available because the index groups by lot.

FigureSupplier COAThis reportIndex note
Purity (% area)97.9897.83divergence +0.09 pp vs batch median
Total impurities (% area)2.022.17
Largest single impurity (% area)0.890.90
Water (%)not stated5.11
Counter-ion (%)7.67.36
Peptide content (%w/w)88.3not determined
Endotoxin (EU/mg)not statednot determined
Method stated on certificateYEScolumn, gradient and wavelength given
Section 5

Impurity fingerprint

The named impurities reported across this lot's assays, with how consistently each was seen. A fingerprint is what allows two lot numbers held by different companies to be identified as one bulk.

Named impurityReported inMedian % areaRange
truncated (1-12)10 / 100.870.50–1.15
acetylated N-terminus (+42 Da)10 / 100.330.23–0.94
pyroglutamate cyclisation (−17 Da)10 / 100.160.13–0.39
[D-Val]-diastereomer10 / 100.050.02–0.15
des-Gly truncate (−57 Da)10 / 100.370.06–0.78
BPC-157 arginine-salt artefact9 / 100.050.04–0.08
Section 7

What this rollup does not establish