AX-2024-004308 · Sermorelin · QYB lot QYB-2404-W5163

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, 25 min gradient, 214 nm	99.72	% area	≥ 98.0	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.28	% area	≤ 2.0	PASS
Largest single impurity	RP-HPLC — deamidated Asn8 (+1 Da)	0.14	% area	≤ 1.00	PASS
Identity — theoretical monoisotopic mass	calculated from molecular formula	3355.7245	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, unit resolution (single quadrupole)	3355.7795	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	+16.4	ppm	± 15	FAIL
Total peptide content	by difference from the gravimetric mass balance	92.12	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	91.86	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	5.52	mg	5 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	5.071	mg	5 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	101.4	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	4.24	%	≤ 9.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	3.22	%	≤ 12.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.42	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.60	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	White powder, no defined cake (melt-back)	—	white to off-white intact cake	FAIL
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	5.42	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 25 min gradient	10.52	min	10.52 ± 0.30 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	1.08	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	35,881	—	≥ 20,000	PASS
Resolution to nearest impurity	vs deamidated Asn8 (+1 Da)	1.10	—	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, 25 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 35,881, and skew follows the reported asymmetry factor of 1.08. 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 0.14 % impurity against a 99.72 % 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	Sermorelin — main peak	10.52	4,846,701	99.72	—
2	deamidated Asn8 (+1 Da)	10.27	6,804	0.14	+0.984
3	truncated (1-25)	9.65	3,888	0.08	-455.248
4	aspartimide (−18 Da)	10.82	1,944	0.04	-18.011
5	des-Tyr1 (−163 Da)	10.09	972	0.02	-163.063
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 3355.7245 Da, computed from C149H246N44O42. All ppm figures on this site are against monoisotopic values — see why that matters.

Figure 2. ESI charge-state envelope, unit-resolution instrument. Sticks are placed at m/z = (M + z × 1.007276)/z for the observed neutral mass of 3355.7795 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 (%)
5+	672.1522	672.1632	0.0110	7.8
4+	839.9384	839.9522	0.0138	54.4
3+	1119.5821	1119.6004	0.0183	100.0
2+	1678.8695	1678.8970	0.0275	54.3

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	4.24
Counter-ion (acetate)	ion chromatography	3.22
Residual solvent + inorganic residue	estimated	0.42
Total peptide content	by difference	92.12
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	99.72	divergence +0.55 pp vs batch median
Total impurities (% area)	0.10	0.28
Largest single impurity (% area)	not stated	0.14
Water (%)	not stated	4.24
Counter-ion (%)	not stated	3.22
Peptide content (%w/w)	not stated	92.12
Endotoxin (EU/mg)	0.25	0.60
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: Supplier-supplied
Evidentiary weight: Weaker evidence. Read with the caveat below.
Chain of custody: Supplier despatch → laboratory direct (courier, cold pack, 5 d) → assay. Submitter did not handle the vial.
Assay date: 29 May 2024
Submitted to the index: 08 Jun 2024
Laboratory: Medutest, Ljubljana, Slovenia
Method basis: 25 min gradient · unit-resolution MS
Verification status: IDENTITY CONSISTENT

What this report does not establish

That the compound is not a near-isobaric alternative. Identity was confirmed at unit mass resolution, which cannot exclude species differing by 1 or 2 Da. The specific alternatives not excluded are named in the identity block above.
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 QYB-2404-W5163 n=12

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2024-004300	QYB-2404-W5163	Medutest	2024-Q2	99.22	3.53	—	Supplier-supplied	0	PASS
AX-2024-004301	QYB-2404-W5163	Janoshik	2024-Q2	99.63	2.94	—	Supplier-supplied	0	PASS
AX-2024-004302	QYB-2404-W5163	Medutest	2024-Q2	99.17	4.02	—	Supplier-supplied	0	PASS
AX-2024-004303	QYB-2404-W5163	Janoshik	2024-Q2	99.38	3.89	92.2	Supplier-supplied	1	MARGINAL
AX-2024-004304	QYB-2404-W5163	Janoshik	2024-Q2	99.17	3.70	—	Laboratory-retained	0	PASS
AX-2024-004305	QYB-2404-W5163	Janoshik	2024-Q2	99.33	3.19	96.0	Supplier-supplied	0	PASS
AX-2024-004306	QYB-2404-W5163	Janoshik	2024-Q2	99.15	4.05	—	Supplier-supplied	0	PASS
AX-2024-004307	QYB-2404-W5163	Medutest	2024-Q2	98.75	3.38	95.0	Supplier-supplied	0	PASS
AX-2024-004309	QYB-2404-W5163	PeptideMeter	2024-Q2	99.47	3.31	—	Supplier-supplied	0	PASS
AX-2024-004310	QYB-2404-W5163	Janoshik	2024-Q2	99.50	3.30	102.7	Supplier-supplied	0	PASS
AX-2024-004311	QYB-2404-W5163	Janoshik	2024-Q2	99.80	3.32	106.8	Supplier-supplied	0	PASS

Batch rollup and reproducibility assessment →

Cross-sections

Other recent Sermorelin records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-042057	TFC	TFC-2605-Y6440	Janoshik	2026-Q3	98.68	3.94	98.3	Supplier-supplied	0	PASS
AX-2026-043421	WXT	WXT-2608-P4867	Janoshik	2026-Q3	98.15	3.09	—	Supplier-supplied	0	PASS
AX-2026-043420	WXT	WXT-2608-P4867	Medutest	2026-Q3	98.62	3.07	96.4	Supplier-supplied	0	PASS
AX-2026-043423	WXT	WXT-2608-P4867	Janoshik	2026-Q3	98.28	3.86	98.5	Buyer-sourced	0	PASS
AX-2026-042058	TFC	TFC-2605-Y6440	Nordanalyt	2026-Q3	98.71	3.69	107.1	Supplier-supplied	0	PASS
AX-2026-043422	WXT	WXT-2608-P4867	Medutest	2026-Q3	98.35	3.59	—	Supplier-supplied	1	MARGINAL
AX-2026-043418	WXT	WXT-2608-P4867	Janoshik	2026-Q3	98.47	2.88	89.7	Supplier-supplied	1	MARGINAL
AX-2026-042060	TFC	TFC-2605-Y6440	Nordanalyt	2026-Q3	98.31	3.30	92.4	Supplier-supplied	0	PASS

Other recent QYB records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-041453	Retatrutide	QYB-2604-B5660	VendorInvestigate	2026-Q3	98.02	2.55	—	Buyer-sourced	1	MARGINAL
AX-2026-041454	Retatrutide	QYB-2604-B5660	Janoshik	2026-Q3	98.84	2.77	—	Supplier-supplied	1	MARGINAL
AX-2026-041538	Retatrutide	QYB-2602-G6308	Medutest	2026-Q3	98.50	2.85	—	Supplier-supplied	2	MARGINAL
AX-2026-041456	Retatrutide	QYB-2604-B5660	Janoshik	2026-Q3	98.23	3.24	—	Supplier-supplied	1	MARGINAL
AX-2026-041452	Retatrutide	QYB-2604-B5660	Nordanalyt	2026-Q3	98.50	3.36	—	Supplier-supplied	1	MARGINAL
AX-2026-041427	Ipamorelin	QYB-2605-H4298	Janoshik	2026-Q3	99.93	4.12	—	Supplier-supplied	0	PASS
AX-2026-041488	PT-141 (Bremelanotide)	QYB-2607-L5615	Janoshik	2026-Q3	99.93	3.79	—	Supplier-supplied	0	PASS
AX-2026-041459	Retatrutide	QYB-2604-B5660	VendorInvestigate	2026-Q3	97.91	2.84	92.2	Buyer-sourced	1	MARGINAL