AX-2025-020129 · Ipamorelin · ERP lot ERP-2505-U8938

Section 1

Results

Measured against the index acceptance specification for the growth-hormone axis 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	99.47	% area	≥ 99.0	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.53	% area	≤ 1.0	PASS
Largest single impurity	RP-HPLC — des-Lys (−128 Da)	0.34	% 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	88.41	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	87.94	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	10.71	mg	10 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	9.418	mg	10 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	94.2	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	3.84	%	≤ 9.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	6.78	%	≤ 12.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.97	%	—	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 lyophilised 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	4.91	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 28 min gradient	7.66	min	7.73 ± 0.25 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	0.90	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	69,770	—	≥ 20,000	PASS
Resolution to nearest impurity	vs [D-Trp]-epimer	0.94	—	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 69,770, and skew follows the reported asymmetry factor of 0.90. 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 0.34 % impurity against a 99.47 % 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	Ipamorelin — main peak	7.66	4,834,550	99.47	—
2	des-Lys (−128 Da)	7.45	16,525	0.34	-128.095
3	oxidised Trp (+16 Da)	7.34	4,860	0.10	+15.995
4	[D-Trp]-epimer	7.55	2,916	0.06	0.000
5	Aib-deletion sequence (−85 Da)	7.40	1,458	0.03	-85.053
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	3.84
Counter-ion (acetate)	ion chromatography	6.78
Residual solvent + inorganic residue	estimated	0.97
Total peptide content	by difference	88.41
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)	99.90	99.47	divergence +0.28 pp vs batch median
Total impurities (% area)	not stated	0.53
Largest single impurity (% area)	not stated	0.34
Water (%)	1.7	3.84
Counter-ion (%)	2.3	6.78
Peptide content (%w/w)	95.4	88.41
Endotoxin (EU/mg)	not stated	not determined
Method stated on certificate	NO	—	no method section — the result cannot be reconciled against any other

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: Buyer-sourced
Evidentiary weight: Strongest available evidence in this index.
Chain of custody: Domestic warehouse despatch → submitter (2–8 °C, 11 d) → laboratory (courier, cold pack, 8 d) → assay.
Assay date: 26 Oct 2025
Submitted to the index: 14 Nov 2025
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 4

Signed technical comments from index contributors. Not a discussion forum — annotations question or contextualise the result, and the data team replies where a reply is warranted.

valley_drop14 Nov 2025

Largest single impurity is des-Lys (−128 Da) at 0.34 % area, and it is the only named peak above 0.1 %. The integration is unambiguous and 99.47 % can be taken at face value.

lambda_21414 Nov 2025

At 214 nm the amide bond dominates the response, so a peptide impurity is seen roughly in proportion to its size. 99.47 % on this detection is the conservative reading; a 280 nm trace would flatter it.

selection_bias14 Nov 2025

Provenance handles supplier selection. It does not handle submitter selection, which is the larger confounder and the one the index cannot measure.

aib_two14 Nov 2025

On the multi-Aib analogues the des-Aib species elutes a third of a minute early and routinely arrives as a leading shoulder rather than a peak. That is a compound property and every laboratory faces it.

Section 7

Related records

Same batch — lot ERP-2505-U8938 n=9

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2025-020124	ERP-2505-U8938	Janoshik	2025-Q4	99.64	3.75	—	Buyer-sourced	2	MARGINAL
AX-2025-020125	ERP-2505-U8938	Janoshik	2025-Q4	99.61	3.79	—	Buyer-sourced	1	MARGINAL
AX-2025-020126	ERP-2505-U8938	Medutest	2025-Q4	99.62	4.09	100.7	Buyer-sourced	1	MARGINAL
AX-2025-020127	ERP-2505-U8938	PeptideMeter	2025-Q4	99.93	4.13	107.5	Buyer-sourced	1	MARGINAL
AX-2025-020128	ERP-2505-U8938	Medutest	2025-Q4	99.93	3.85	89.0	Buyer-sourced	2	MARGINAL
AX-2025-020130	ERP-2505-U8938	PeptideMeter	2025-Q4	99.55	4.52	101.6	Buyer-sourced	1	MARGINAL
AX-2025-020131	ERP-2505-U8938	PeptideMeter	2025-Q4	99.90	3.81	—	Buyer-sourced	1	MARGINAL
AX-2026-042690	ERP-2505-U8938	Janoshik	2025-Q4	99.51	4.34	—	Buyer-sourced	1	MARGINAL

Batch rollup and reproducibility assessment →

Cross-sections

Other recent Ipamorelin records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-041377	QYB	QYB-2605-H3558	Nordanalyt	2026-Q3	99.93	4.35	—	Buyer-sourced	0	PASS
AX-2026-041913	SinoPep	SNP-2606-L4478	PeptideMeter	2026-Q3	98.88	5.28	—	Buyer-sourced	0	FAIL
AX-2026-041914	SinoPep	SNP-2606-L4478	Janoshik	2026-Q3	99.14	5.49	—	Buyer-sourced	0	PASS
AX-2026-041909	SinoPep	SNP-2606-L4478	PeptideMeter	2026-Q3	99.00	5.48	89.5	Buyer-sourced	1	MARGINAL
AX-2026-041895	SinoPep	SNP-2602-B3833	Janoshik	2026-Q3	99.93	4.72	105.9	Buyer-sourced	1	MARGINAL
AX-2026-041898	SinoPep	SNP-2602-B3833	Nordanalyt	2026-Q3	99.93	4.54	96.0	Buyer-sourced	1	MARGINAL
AX-2026-041899	SinoPep	SNP-2602-B3833	PeptideMeter	2026-Q3	99.93	4.96	90.1	Buyer-sourced	1	MARGINAL
AX-2026-041891	SinoPep	SNP-2602-B3833	Janoshik	2026-Q3	99.93	5.11	—	Buyer-sourced	1	MARGINAL

Other recent ERP records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-042706	Survodutide	ERP-2605-E9865	PeptideMeter	2026-Q3	98.38	5.33	103.5	Buyer-sourced	0	PASS
AX-2026-042704	Tesamorelin	ERP-2604-W9463	Janoshik	2026-Q3	99.02	4.08	—	Buyer-sourced	1	MARGINAL
AX-2026-042705	Survodutide	ERP-2605-E9865	Janoshik	2026-Q3	98.24	5.36	92.3	Buyer-sourced	0	PASS
AX-2026-042708	GHK-Cu	ERP-2601-F9816	Nordanalyt	2026-Q2	98.88	3.87	91.5	Buyer-sourced	1	MARGINAL
AX-2026-042694	Liraglutide	ERP-2601-P8985	Kestrel	2026-Q2	99.25	4.35	107.3	Buyer-sourced	1	MARGINAL
AX-2026-042707	GHK-Cu	ERP-2601-F9816	Janoshik	2026-Q2	98.53	4.70	96.3	Buyer-sourced	1	MARGINAL
AX-2026-042711	GHK-Cu	ERP-2601-F9816	Kestrel	2026-Q2	98.53	3.84	89.7	Laboratory-retained	2	MARGINAL
AX-2026-042722	Tirzepatide	ERP-2512-T9616	Medutest	2026-Q2	99.18	2.07	—	Buyer-sourced	1	MARGINAL