AX-2025-019408 · MGF · HYB lot HYB-2509-X7841

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, 30 min gradient, 214 nm	99.73	% area	≥ 97.5	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.27	% area	≤ 2.5	PASS
Largest single impurity	RP-HPLC — deamidated (+1 Da)	0.16	% area	≤ 1.00	PASS
Identity — theoretical monoisotopic mass	calculated from molecular formula	2886.5117	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, high resolution (ESI-TOF/QTOF)	2886.4952	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	-5.7	ppm	± 15	PASS
Total peptide content	by difference from the gravimetric mass balance	90.63	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	90.39	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	5.31	mg	5 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	4.800	mg	5 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	96.0	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	2.99	%	≤ 9.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	6.23	%	≤ 12.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.15	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.99	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 lyophilised cake, intact	—	white to off-white intact cake	PASS
Reconstitution clarity	reconstituted per submitter procedure	Faint haze, clearing on standing	—	clear, no visible particulates	FAIL
pH (reconstituted, 1 mg/mL)	potentiometric, two-point calibration	4.85	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 30 min gradient	11.47	min	11.62 ± 0.30 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	1.12	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	70,457	—	≥ 20,000	PASS
Resolution to nearest impurity	vs deamidated (+1 Da)	1.35	—	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, 30 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 70,457, and skew follows the reported asymmetry factor of 1.12. 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 0.16 % impurity against a 99.73 % 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	MGF — main peak	11.47	4,847,187	99.73	—
2	deamidated (+1 Da)	11.23	7,776	0.16	+0.984
3	aspartimide (−18 Da)	11.79	3,402	0.07	-18.011
4	acetyl adduct (+42 Da)	11.87	972	0.02	+42.011
5	truncated (1-20)	10.25	972	0.02	-486.271
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 2886.5117 Da, computed from C121H200N42O37. 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 2886.4952 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+	578.3096	578.3063	-0.0033	9.1
4+	722.6352	722.6311	-0.0041	54.1
3+	963.1778	963.1723	-0.0055	100.0
2+	1444.2631	1444.2549	-0.0082	51.7

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	2.99
Counter-ion (acetate)	ion chromatography	6.23
Residual solvent + inorganic residue	estimated	0.15
Total peptide content	by difference	90.63
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)	99.83	99.73	divergence +0.09 pp vs batch median
Total impurities (% area)	0.17	0.27
Largest single impurity (% area)	0.12	0.16
Water (%)	not stated	2.99
Counter-ion (%)	not stated	6.23
Peptide content (%w/w)	not stated	90.63
Endotoxin (EU/mg)	not stated	0.99
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 (ambient, 29 d) → laboratory (courier, cold pack, 7 d) → assay.
Assay date: 28 Oct 2025
Submitted to the index: 22 Nov 2025
Laboratory: Janoshik Analytical, Ostrava, Czechia
Method basis: 30 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.

des_gly22 Nov 2025

At 99.73 % the deletion-sequence family is at or below the reporting threshold. On a sequence with a hindered coupling that is a statement about coupling efficiency, and a good one.

shipping_temp22 Nov 2025

The custody block above records the shipping conditions this vial actually experienced, which is the condition an ordinary buyer's vial experiences too. That representativeness is the point.

Section 7

Related records

Same batch — lot HYB-2509-X7841 n=9

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Result
AX-2026-042096	HYB-2509-X7841	Janoshik	2025-Q4	99.93	2.37	95.5	Buyer-sourced	PASS
AX-2025-019403	HYB-2509-X7841	Janoshik	2025-Q4	99.93	2.26	—	Buyer-sourced	PASS
AX-2025-019404	HYB-2509-X7841	Nordanalyt	2025-Q4	99.74	1.90	—	Buyer-sourced	PASS
AX-2025-019405	HYB-2509-X7841	Janoshik	2025-Q4	99.72	2.39	100.4	Buyer-sourced	PASS
AX-2025-019406	HYB-2509-X7841	Janoshik	2025-Q4	99.56	2.85	98.8	Buyer-sourced	PASS
AX-2025-019407	HYB-2509-X7841	PeptideMeter	2025-Q4	99.83	3.34	97.0	Buyer-sourced	PASS
AX-2025-019409	HYB-2509-X7841	PeptideMeter	2025-Q4	99.93	2.27	97.6	Buyer-sourced	PASS
AX-2025-019410	HYB-2509-X7841	Janoshik	2025-Q4	99.72	2.19	107.1	Buyer-sourced	PASS

Batch rollup and reproducibility assessment →

Cross-sections

Other recent MGF records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Result
AX-2026-043660	PPG	PPG-2512-G7713	Janoshik	2026-Q2	99.30	4.25	95.8	Buyer-sourced	PASS
AX-2026-043656	PPG	PPG-2512-G7713	PeptideMeter	2026-Q2	99.09	4.22	99.3	Buyer-sourced	PASS
AX-2026-043657	PPG	PPG-2512-G7713	Janoshik	2026-Q2	99.06	4.25	107.0	Buyer-sourced	PASS
AX-2026-043466	BCH	BCH-2511-D5168	Janoshik	2026-Q2	99.04	5.33	103.5	Buyer-sourced	PASS
AX-2026-043464	BCH	BCH-2511-D5168	VendorInvestigate	2026-Q2	99.39	5.79	100.2	Buyer-sourced	PASS
AX-2026-043655	PPG	PPG-2512-G7713	Medutest	2026-Q2	99.03	4.14	99.6	Buyer-sourced	PASS
AX-2026-043467	BCH	BCH-2511-D5168	Janoshik	2026-Q2	99.46	5.95	—	Supplier-supplied	PASS
AX-2026-043652	PPG	PPG-2512-G7713	Janoshik	2026-Q2	99.33	3.87	101.6	Buyer-sourced	PASS

Other recent HYB records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-042083	MOTS-c	HYB-2606-D7858	Medutest	2026-Q3	99.93	2.02	—	Buyer-sourced	0	PASS
AX-2026-042090	MOTS-c	HYB-2606-D7858	Janoshik	2026-Q3	99.57	2.36	—	Buyer-sourced	1	FAIL
AX-2026-042084	MOTS-c	HYB-2606-D7858	Janoshik	2026-Q3	99.28	2.79	107.3	Buyer-sourced	0	PASS
AX-2026-042087	MOTS-c	HYB-2606-D7858	Janoshik	2026-Q3	99.54	3.05	—	Buyer-sourced	0	PASS
AX-2026-042085	MOTS-c	HYB-2606-D7858	Janoshik	2026-Q3	99.51	2.31	—	Buyer-sourced	0	PASS
AX-2026-042088	MOTS-c	HYB-2606-D7858	PeptideMeter	2026-Q3	99.22	2.21	—	Buyer-sourced	0	PASS
AX-2026-042086	MOTS-c	HYB-2606-D7858	Janoshik	2026-Q3	99.93	3.02	—	Buyer-sourced	1	MARGINAL
AX-2026-042091	CJC-1295 with DAC	HYB-2608-E7391	Janoshik	2026-Q3	99.38	5.53	—	Buyer-sourced	0	PASS