AX-2026-041373 · Ipamorelin · WWB lot WWB-2601-C3477

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, 32 min gradient, 214 nm	99.32	% area	≥ 99.0	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.68	% area	≤ 1.0	PASS
Largest single impurity	RP-HPLC — oxidised Trp (+16 Da)	0.27	% area	≤ 1.00	PASS
Identity — theoretical monoisotopic mass	calculated from molecular formula	711.3856	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, high resolution (ESI-TOF/QTOF)	711.3853	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	-0.4	ppm	± 15	PASS
Total peptide content	by difference from the gravimetric mass balance	85.34	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	84.76	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	5.48	mg	5 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	4.645	mg	5 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	92.9	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	6.15	%	≤ 9.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	8.27	%	≤ 12.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.24	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.24	EU/mg	≤ 5.0	PASS
Sterility	not ordered on this submission	not determined	—	no growth	NOT TESTED
Appearance	visual, diffuse light, black and white background	Off-white lyophilised cake, intact	—	white to off-white intact cake	PASS
Reconstitution clarity	reconstituted per submitter procedure	Clear with a single visible fibre	—	clear, no visible particulates	FAIL
pH (reconstituted, 1 mg/mL)	potentiometric, two-point calibration	4.23	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 32 min gradient	8.65	min	8.75 ± 0.25 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	0.86	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	49,758	—	≥ 20,000	PASS
Resolution to nearest impurity	vs [D-Trp]-epimer	0.81	—	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, 32 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 49,758, and skew follows the reported asymmetry factor of 0.86. 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 0.27 % impurity against a 99.32 % 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	8.65	4,827,260	99.32	—
2	oxidised Trp (+16 Da)	8.29	13,123	0.27	+15.995
3	des-Lys (−128 Da)	8.42	12,637	0.26	-128.095
4	C-terminal free acid (+1 Da)	8.84	3,888	0.08	+0.984
5	Aib-deletion sequence (−85 Da)	8.35	1,944	0.04	-85.053
6	[D-Trp]-epimer	8.52	1,458	0.03	0.000
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 3

Mass spectrum and identity

Theoretical monoisotopic mass 711.3856 Da, computed from C38H49N9O5. All ppm figures on this site are against monoisotopic values — see why that matters.

Figure 2. ESI charge-state envelope, high-resolution instrument. Sticks are placed at m/z = (M + z × 1.007276)/z for the observed neutral mass of 711.3853 Da. Sodium (+21.982/z) and potassium (+37.956/z) adducts are shown where the parent charge state exceeds 25 % relative abundance; they are adducts of the same molecule and are not impurities.

Charge	Theoretical m/z	Observed m/z	Δ m/z	Rel. abundance (%)
2+	356.7001	356.6999	-0.0002	49.3
1+	712.3929	712.3926	-0.0003	100.0

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	6.15
Counter-ion (acetate)	ion chromatography	8.27
Residual solvent + inorganic residue	estimated	0.24
Total peptide content	by difference	85.34
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	99.32	divergence +0.22 pp vs batch median
Total impurities (% area)	0.10	0.68
Largest single impurity (% area)	0.06	0.27
Water (%)	not stated	6.15
Counter-ion (%)	4.1	8.27
Peptide content (%w/w)	91.8	85.34
Endotoxin (EU/mg)	not stated	0.24
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: Buyer-sourced
Evidentiary weight: Strongest available evidence in this index.
Chain of custody: Retail purchase → submitter (2–8 °C, 10 d) → laboratory (courier, ambient, 5 d) → assay.
Assay date: 24 Jan 2026
Submitted to the index: 31 Jan 2026
Laboratory: VendorInvestigate, Riga, Latvia
Method basis: 32 min gradient · high-resolution MS
Verification status: VERIFIED

What this report does not establish

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 2

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.

prep_hplc_cut31 Jan 2026

0.68 % total impurities on Ipamorelin means the preparative fraction was cut narrow. That trades yield for purity, and the trade was made in the buyer's favour on this lot.

sodium_adduct31 Jan 2026

Adduct bookkeeping on this one is tidy. The sodium series is present at the expected intensity ratio and has not been counted as an impurity, which happens more often than it should.

Section 7

Related records

Same batch — lot WWB-2601-C3477 n=5

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Result
AX-2026-041372	WWB-2601-C3477	VendorInvestigate	2026-Q1	99.52	6.17	—	Buyer-sourced	PASS
AX-2026-041374	WWB-2601-C3477	VendorInvestigate	2026-Q1	99.83	5.69	103.1	Laboratory-retained	PASS
AX-2026-041375	WWB-2601-C3477	PeptideMeter	2026-Q1	99.85	5.65	—	Laboratory-retained	PASS
AX-2026-041376	WWB-2601-C3477	Medutest	2026-Q1	99.68	6.47	100.1	Buyer-sourced	PASS

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 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	99.33	4.39	—	Buyer-sourced	1	MARGINAL
AX-2026-041334	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	98.93	4.62	99.9	Buyer-sourced	0	PASS
AX-2026-041337	Semaglutide	WWB-2606-N3192	Nordanalyt	2026-Q3	99.52	3.92	—	Buyer-sourced	0	PASS
AX-2026-041335	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	99.15	4.27	98.9	Buyer-sourced	0	PASS
AX-2026-041271	Liraglutide	WWB-2607-X2189	Medutest	2026-Q3	99.52	4.57	97.4	Buyer-sourced	1	MARGINAL
AX-2026-041328	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	98.99	4.47	106.1	Buyer-sourced	0	PASS
AX-2026-041333	Semaglutide	WWB-2606-N3192	Janoshik	2026-Q3	99.18	4.51	90.4	Laboratory-retained	0	PASS
AX-2026-041273	Liraglutide	WWB-2607-X2189	Janoshik	2026-Q3	99.31	5.52	104.8	Buyer-sourced	1	MARGINAL