AX-2026-041247

GHK-Cu · 100 mg declared · Wuhan Wansheng Biotechnology Co., Ltd. · lot WWB-2512-B1996

PASSPURITY ONLY

Report ID: AX-2026-041247
Compound: GHK-Cu
Compound class: Tissue-repair and immunomodulatory peptides
Supplier: WWB — Wuhan Wansheng Biotechnology Co., Ltd.
Batch / lot: WWB-2512-B1996
Declared label claim: 100mg
Laboratory: PeptideMeter
Assay date: 03 Jun 2026
Submitted: 29 Jun 2026
Quarter: 2026-Q2
Submitter: k.nascimento
Sample provenance: Supplier-supplied

Section 1

Results

Measured against the index acceptance specification for the tissue-repair and immunomodulatory peptides class. A specification is a decision the index made; a result is a measurement. See where each threshold came from.

Parameter	Method	Result	Unit	Index spec
Purity	RP-HPLC, 28 min gradient, 214 nm	99.93	% area	≥ 97.0	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.07	% area	≤ 3.0	PASS
Largest single impurity	RP-HPLC — apo-GHK (copper-free, −62 Da)	0.04	% area	≤ 1.00	PASS
Identity	not ordered on this submission	not determined	—	required for VERIFIED status	NOT TESTED
Total peptide content	by difference from the gravimetric mass balance	93.67	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	93.60	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	111.98	mg	100 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	104.813	mg	100 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	104.8	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	5.95	%	≤ 10.0	PASS
Counter-ion	no ionisable counter-ion expected	N/A	—	not applicable	NOT TESTED
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.38	%	—	NOT TESTED
Endotoxin	not ordered on this submission	not determined	—	≤ 5.0	NOT TESTED
Sterility	not ordered on this submission	not determined	—	no growth	NOT TESTED
Appearance	visual, diffuse light, black and white background	White to pale-yellow cake, intact	—	white to off-white intact cake	PASS
Reconstitution clarity	reconstituted per submitter procedure	Clear, colourless, no visible particulates	—	clear, no visible particulates	PASS
pH (reconstituted, 1 mg/mL)	potentiometric, two-point calibration	7.17	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 28 min gradient	5.91	min	5.80 ± 0.25 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	1.27	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	15,000	—	≥ 20,000	FAIL
Resolution to nearest impurity	vs apo-GHK (copper-free, −62 Da)	2.26	—	no index criterion	REPORTED

Section 2

Chromatogram and peak integration

The figure is drawn from the table. It is not an independent illustration — if a number in the table changed, the trace would change with it.

Figure 1. RP-HPLC trace, 28 min gradient, 214 nm. Drawn from the peak-integration table below: peak positions are the reported retention times, peak areas are the reported area percentages, peak widths follow the reported plate count of 15,000, and skew follows the reported asymmetry factor of 1.27. Baseline noise is seeded from the report ID and is illustrative. The lower panel is the same trace at a stated vertical expansion with the slow gradient drift subtracted, because at full scale a 0.04 % impurity against a 99.93 % main peak is a line two pixels tall; the main peak runs off-scale there by design.

#	Peak	RT	Area (µV·s)	% area	Δ mass (Da)
1	GHK-Cu — main peak	5.91	4,856,908	99.93	—
2	apo-GHK (copper-free, −62 Da)	5.46	1,944	0.04	-61.930
3	GHK-Cu 2:1 complex	6.49	1,458	0.03	+277.145
Closure check — purity + Σ impurities				100.00	CLOSES

Reporting threshold 0.05 % area. Peaks below it are not reported and are therefore excluded from the total, which overstates purity by their sum — see peak integration.

Section 4

Gravimetric mass balance

Water, counter-ion, residual and total peptide content are exhaustive and mutually exclusive categories. They must account for 100 % of the cake mass. The index closes this to within 0.02 pp and the build asserts it.

Component	Determination	%w/w of cake
Water	Karl Fischer	5.95
Counter-ion	none expected	0.00
Residual solvent + inorganic residue	estimated	0.38
Total peptide content	by difference	93.67
Total		100.00 CLOSES

Supplier certificate, as declared

The supplier's own figures for this lot, beside the independent measurement. Divergence is assessed against the batch median, not against this single report — see rule AX-R05.

Figure	Supplier COA	This report	Index note
Purity (% area)	99.76	99.93	divergence +0.34 pp vs batch median
Total impurities (% area)	0.24	0.07
Largest single impurity (% area)	not stated	0.04
Water (%)	4.0	5.95
Counter-ion (%)	2.3	N/A
Peptide content (%w/w)	93.1	93.67
Endotoxin (EU/mg)	not stated	not determined
Method stated on certificate	YES	—	column, gradient and wavelength given

Section 5

Provenance and caveats

Where a sample came from changes the weight of the evidence. The index treats it as a first-class field.

Sample provenance: Supplier-supplied
Evidentiary weight: Weaker evidence. Read with the caveat below.
Chain of custody: Supplier despatch → laboratory direct (courier, cold pack, 3 d) → assay. Submitter did not handle the vial.
Assay date: 03 Jun 2026
Submitted to the index: 29 Jun 2026
Laboratory: PeptideMeter, Tallinn, Estonia
Method basis: 28 min gradient · high-resolution MS
Verification status: PURITY ONLY

What this report does not establish

That the compound is the compound named. No identity confirmation was ordered on this submission. A purity figure describes chromatographic homogeneity of whatever eluted; it does not name it.
That the material is free of bacterial endotoxin. Endotoxin was not measured. No chromatographic result bears on it.
That the material is sterile. Sterility was not tested.
That any other vial in the same lot has the same composition. One vial was tested. Within-lot vial-to-vial variation in this index has a median of 0.28 pp and a 90th percentile of 0.74 pp.
That any other lot from the same supplier has the same composition. Batch-to-batch variation is larger than within-batch variation for every supplier here.
That the material is suitable for administration to a human or an animal. These are research compounds. No result on this site is a safety assessment and the index takes no position on use.
That the material was manufactured by the supplier that sold it. Contract synthesis is normal in this market and twenty-nine batches in the index fingerprint to a bulk from a different company than the one named on the label.

Section 6

Annotations

No annotations on this record. Annotations are short signed technical comments from index contributors; see how to contribute.

Section 7

Related records

Same batch — lot WWB-2512-B1996 n=7

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-041245	WWB-2512-B1996	PeptideMeter	2026-Q2	99.26	6.33	106.9	Supplier-supplied	0	PASS
AX-2026-041246	WWB-2512-B1996	Janoshik	2026-Q2	98.85	5.71	89.8	Supplier-supplied	1	MARGINAL
AX-2026-041248	WWB-2512-B1996	PeptideMeter	2026-Q2	99.04	6.05	—	Supplier-supplied	0	PASS
AX-2026-041249	WWB-2512-B1996	Medutest	2026-Q2	99.42	5.93	—	Laboratory-retained	0	PASS
AX-2026-041250	WWB-2512-B1996	Janoshik	2026-Q2	99.43	6.14	—	Supplier-supplied	0	PASS
AX-2026-041251	WWB-2512-B1996	PeptideMeter	2026-Q2	99.56	6.16	—	Supplier-supplied	0	PASS

Batch rollup and reproducibility assessment →

Cross-sections

Other recent GHK-Cu records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043144	SSA	SSA-2604-V7620	Janoshik	2026-Q2	98.35	5.25	105.8	Supplier-supplied	0	PASS
AX-2026-042550	ERP	ERP-2601-F7633	Janoshik	2026-Q2	98.53	4.43	—	Supplier-supplied	1	MARGINAL
AX-2026-042571	ERP	ERP-2604-K8139	Medutest	2026-Q2	99.25	6.66	104.4	Supplier-supplied	1	MARGINAL
AX-2026-042552	ERP	ERP-2601-F7633	Kestrel	2026-Q2	98.39	4.13	—	Supplier-supplied	0	PASS
AX-2026-041251	WWB	WWB-2512-B1996	PeptideMeter	2026-Q2	99.56	6.16	—	Supplier-supplied	0	PASS
AX-2026-043205	SGN	SGN-2603-X9044	Janoshik	2026-Q2	97.53	4.68	98.0	Supplier-supplied	0	PASS
AX-2026-041250	WWB	WWB-2512-B1996	Janoshik	2026-Q2	99.43	6.14	—	Supplier-supplied	0	PASS
AX-2026-042551	ERP	ERP-2601-F7633	Nordanalyt	2026-Q2	98.41	4.50	—	Laboratory-retained	0	PASS

Other recent WWB records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-041275	Liraglutide	WWB-2607-X2189	Nordanalyt	2026-Q3	99.61	5.03	97.3	Supplier-supplied	0	PASS
AX-2026-041387	BPC-157	WWB-2606-H3906	Janoshik	2026-Q3	98.95	4.64	—	Laboratory-retained	1	MARGINAL
AX-2026-041334	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	98.83	5.04	—	Supplier-supplied	1	MARGINAL
AX-2026-041337	Semaglutide	WWB-2606-N3192	Nordanalyt	2026-Q3	98.96	4.81	—	Supplier-supplied	1	MARGINAL
AX-2026-041385	BPC-157	WWB-2606-H3906	Medutest	2026-Q3	99.31	4.31	—	Supplier-supplied	1	MARGINAL
AX-2026-041390	BPC-157	WWB-2606-H3906	Medutest	2026-Q3	99.47	4.84	99.3	Supplier-supplied	1	MARGINAL
AX-2026-041386	BPC-157	WWB-2606-H3906	VendorInvestigate	2026-Q3	99.32	4.88	99.2	Buyer-sourced	1	MARGINAL
AX-2026-041335	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	99.55	4.55	100.5	Supplier-supplied	1	MARGINAL