KP-2604-X5435

Hexarelin · 2 mg declared · Zhuhai Kerui Biotechnology Co., Ltd. · manufactured 30 Apr 2026

CHARACTERISED

Lot code: KP-2604-X5435
Supplier: KP — Zhuhai Kerui Biotechnology Co., Ltd.
Compound: Hexarelin
Compound class: Growth-hormone axis peptides
Declared label claim: 2mg
Manufacture date: 30 Apr 2026
Index quarter: 2026-Q2
Independent assays: 10
Laboratories involved: VendorInvestigate, Janoshik, Nordanalyt, Medutest
Provenance mix: Buyer-sourced ×4 · Supplier-supplied ×6

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 98.55% n=10

Spread (max − min) 1.24pp n=10

Standard deviation 0.432pp n=10

Figure 1. This lot's independent purity results against the whole Hexarelin record set in the index. The vertical line is the index acceptance specification for the growth-hormone axis 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 10

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

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043043	KP-2604-X5435	VendorInvestigate	2026-Q2	98.54	3.33	107.2	Buyer-sourced	2	FAIL
AX-2026-043044	KP-2604-X5435	VendorInvestigate	2026-Q2	98.00	3.78	107.5	Buyer-sourced	2	FAIL
AX-2026-043045	KP-2604-X5435	Janoshik	2026-Q2	99.22	3.55	99.0	Supplier-supplied	2	MARGINAL
AX-2026-043046	KP-2604-X5435	Nordanalyt	2026-Q2	99.00	3.50	—	Supplier-supplied	2	MARGINAL
AX-2026-043047	KP-2604-X5435	Janoshik	2026-Q2	98.71	3.22	103.5	Supplier-supplied	2	FAIL
AX-2026-043048	KP-2604-X5435	VendorInvestigate	2026-Q2	98.28	3.15	94.2	Buyer-sourced	2	FAIL
AX-2026-043049	KP-2604-X5435	Nordanalyt	2026-Q2	98.46	3.64	103.0	Buyer-sourced	2	FAIL
AX-2026-043050	KP-2604-X5435	Medutest	2026-Q2	98.56	3.25	104.3	Supplier-supplied	3	FAIL
AX-2026-043051	KP-2604-X5435	Janoshik	2026-Q2	99.10	3.16	104.0	Supplier-supplied	2	MARGINAL
AX-2026-043052	KP-2604-X5435	Janoshik	2026-Q2	97.98	2.79	—	Supplier-supplied	2	FAIL

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.

Laboratory	Reports	Purity results (% area)	Median	Gradient	Published bias (pp)	Bias-adjusted
VendorInvestigate	3	98.54, 98.00, 98.28	98.28	32min	-0.11	98.39
Janoshik	4	99.22, 98.71, 99.10, 97.98	98.91	30min	+0.00	98.91
Nordanalyt	2	99.00, 98.46	98.73	35min	+0.02	98.71
Medutest	1	98.56	98.56	25min	+0.08	98.48

This lot contributes 6 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.

Figure	Supplier COA	This report	Index note
Purity (% area)	99.0	98.54	divergence +0.45 pp vs batch median
Total impurities (% area)	1.00	1.46
Largest single impurity (% area)	0.50	0.64
Water (%)	1.2	3.33
Counter-ion (%)	4.0	4.71
Peptide content (%w/w)	94.2	91.40
Endotoxin (EU/mg)	not stated	not determined
Method stated on certificate	YES	—	column, 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 impurity	Reported in	Median % area	Range
des-methyl hexarelin (GHRP-6, −14 Da)	10 / 10	0.60	0.34–0.78
C-terminal free acid (+1 Da)	10 / 10	0.55	0.29–0.80
oxidised Trp (+16 Da)	10 / 10	0.14	0.07–0.19
des-Lys (−128 Da)	10 / 10	0.12	0.05–0.28

Section 7

Reproducibility across independent tests

Member reports 10

By laboratory

The supplier's certificate for this lot

Impurity fingerprint

What this rollup does not establish