AssayIndex

KP-2509-N5148

KPV · 10 mg declared · Zhuhai Kerui Biotechnology Co., Ltd. · manufactured 22 Sep 2025

CHARACTERISED
Lot code
KP-2509-N5148
Supplier
KP — Zhuhai Kerui Biotechnology Co., Ltd.
Compound
KPV
Compound class
Tissue-repair and immunomodulatory peptides
Declared label claim
10mg
Manufacture date
22 Sep 2025
Index quarter
2025-Q4
Independent assays
12
Laboratories involved
Janoshik, PeptideMeter, Medutest, VendorInvestigate, Nordanalyt
Provenance mix
Buyer-sourced ×5 · Supplier-supplied ×7
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 12
Median purity 99.09% n=12
Spread (max − min) 0.85pp n=12
Standard deviation 0.283pp n=12
97.297.798.298.799.299.6100.1This lot (KP-2509-N5148)This lot (KP-2509-N5148): Q1 98.89, median 99.09, Q3 99.19, n=12n=12All KPVAll KPV: Q1 98.67, median 99.21, Q3 99.77, n=94n=94 Purity (% area)
Figure 1. This lot's independent purity results against the whole KPV record set in the index. The vertical line is the index acceptance specification for the tissue-repair and immunomodulatory peptides class, 99.0 % 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 12

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-2025-020442KP-2509-N5148Janoshik2025-Q499.182.55Supplier-supplied1FAIL
AX-2025-020443KP-2509-N5148Janoshik2025-Q499.462.0599.3Supplier-supplied1MARGINAL
AX-2025-020444KP-2509-N5148Janoshik2025-Q498.992.35Supplier-supplied1FAIL
AX-2025-020445KP-2509-N5148PeptideMeter2025-Q499.162.8791.4Supplier-supplied1MARGINAL
AX-2025-020446KP-2509-N5148Medutest2025-Q499.132.28Supplier-supplied2FAIL
AX-2025-020447KP-2509-N5148VendorInvestigate2025-Q498.962.53Buyer-sourced1FAIL
AX-2025-020448KP-2509-N5148Medutest2025-Q499.042.4490.6Buyer-sourced1MARGINAL
AX-2025-020449KP-2509-N5148VendorInvestigate2025-Q498.632.5398.6Buyer-sourced1FAIL
AX-2025-020450KP-2509-N5148Janoshik2025-Q499.482.3289.5Supplier-supplied2FAIL
AX-2025-020451KP-2509-N5148Janoshik2025-Q499.232.40Supplier-supplied1FAIL
AX-2025-020452KP-2509-N5148Nordanalyt2025-Q498.692.22101.9Buyer-sourced2FAIL
AX-2025-020453KP-2509-N5148Janoshik2025-Q498.671.97Buyer-sourced1FAIL
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
Janoshik699.18, 99.46, 98.99, 99.48, 99.23, 98.6799.2130min+0.0099.21
PeptideMeter199.1699.1628min-0.0599.21
Medutest299.13, 99.0499.0925min+0.0899.01
VendorInvestigate298.96, 98.6398.7932min-0.1198.90
Nordanalyt198.6998.6935min+0.0298.67

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)99.4999.18divergence +0.40 pp vs batch median
Total impurities (% area)0.510.82
Largest single impurity (% area)not stated0.31
Water (%)0.42.55
Counter-ion (%)not stated15.16
Peptide content (%w/w)94.8not determined
Endotoxin (EU/mg)not statednot determined
Method stated on certificateNOno method section — the result cannot be reconciled against any other
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
Lys-Pro dipeptide (−99 Da)12 / 120.160.05–0.49
acetyl-KPV (+42 Da)12 / 120.150.03–0.50
Pro-Val dipeptide (−128 Da)12 / 120.290.07–0.98
diketopiperazine (−18 Da)12 / 120.100.05–0.18
Section 7

What this rollup does not establish