AX-2026-043052 · 5-Amino-1MQ · KP lot KP-2511-W5347

Section 1

Results

Measured against the index acceptance specification for the non-peptide adjuncts 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	99.45	% area	≥ 98.0	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.55	% area	≤ 2.0	PASS
Largest single impurity	RP-HPLC — 5-nitro-1MQ (unreduced precursor, +30 Da)	0.30	% area	≤ 1.00	PASS
Identity — theoretical monoisotopic mass	calculated from molecular formula	285.9967	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, unit resolution (single quadrupole)	286.0002	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	+12.3	ppm	± 10	FAIL
Total peptide content	by difference from the gravimetric mass balance	49.24	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	48.97	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	107.70	mg	50 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	52.741	mg	50 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	105.5	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	4.23	%	≤ 10.0	PASS
Counter-ion (iodide)	anion-exchange ion chromatography	45.95	%	≤ 12.0	FAIL
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.58	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.68	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	Faint haze, clearing on standing	—	clear, no visible particulates	FAIL
pH (reconstituted, 1 mg/mL)	potentiometric, two-point calibration	5.11	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 25 min gradient	4.54	min	4.59 ± 0.25 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	1.02	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	61,270	—	≥ 20,000	PASS
Resolution to nearest impurity	vs free iodide (counter-ion, by IC)	0.00	—	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 61,270, and skew follows the reported asymmetry factor of 1.02. 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 0.30 % impurity against a 99.45 % 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	5-Amino-1MQ — main peak	4.54	4,833,578	99.45	—
2	5-nitro-1MQ (unreduced precursor, +30 Da)	5.11	14,581	0.30	+29.974
3	free iodide (counter-ion, by IC)	4.54	8,263	0.17	0.000
4	8-amino regioisomer	4.72	2,916	0.06	0.000
5	1-methylquinolinium (des-amino, −15 Da)	4.27	972	0.02	-15.011
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 285.9967 Da, computed from C10H11N2+ · I−. 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 286.0002 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 (%)
1+	287.0040	287.0075	0.0035	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	4.23
Counter-ion (iodide)	ion chromatography	45.95
Residual solvent + inorganic residue	estimated	0.58
Total peptide content	by difference	49.24
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)	99.13	99.45	divergence -0.45 pp vs batch median
Total impurities (% area)	0.87	0.55
Largest single impurity (% area)	not stated	0.30
Water (%)	3.6	4.23
Counter-ion (%)	not stated	45.95
Peptide content (%w/w)	91.6	49.24
Endotoxin (EU/mg)	0.42	0.68
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: Retail purchase → submitter (ambient, 22 d) → laboratory (hand-carried, 9 d) → assay.
Assay date: 03 Jun 2026
Submitted to the index: 23 Jun 2026
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 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.

ms_confirm23 Jun 2026

Purity at 99.45 % with identity confirmed on the same submission is the combination worth having. Either alone leaves a question the other answers.

esi_tof23 Jun 2026

Ion suppression from a co-eluting counter-ion at 45.95 % iodide can shift an apparent mass in a time-of-flight measurement. Desalting the injection before the mass determination removes the possibility.

units_pedant23 Jun 2026

Half of all mass disputes are unit errors. Daltons against atomic mass units, average against monoisotopic, ppm against millidaltons: check which pair is on the report before reading +12.3 ppm as a discrepancy.

buyer_sourced23 Jun 2026

The index cannot verify that the vial assayed is representative of the lot it came from, and says so on every record. Provenance narrows that gap; it does not close it.

Section 7

Related records

Same batch — lot KP-2511-W5347 n=11

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Result
AX-2026-043042	KP-2511-W5347	Janoshik	2026-Q2	99.69	3.90	—	Buyer-sourced	FAIL
AX-2026-043043	KP-2511-W5347	Janoshik	2026-Q2	99.58	4.16	101.1	Buyer-sourced	FAIL
AX-2026-043044	KP-2511-W5347	PeptideMeter	2026-Q2	99.61	4.15	90.9	Buyer-sourced	FAIL
AX-2026-043045	KP-2511-W5347	Janoshik	2026-Q2	99.47	4.08	—	Buyer-sourced	FAIL
AX-2026-043046	KP-2511-W5347	Medutest	2026-Q2	99.68	4.10	—	Buyer-sourced	FAIL
AX-2026-043047	KP-2511-W5347	Janoshik	2026-Q2	99.68	4.17	104.0	Supplier-supplied	FAIL
AX-2026-043048	KP-2511-W5347	Medutest	2026-Q2	99.81	4.15	—	Buyer-sourced	FAIL
AX-2026-043049	KP-2511-W5347	Kestrel	2026-Q2	99.53	4.30	—	Buyer-sourced	FAIL
AX-2026-043050	KP-2511-W5347	Janoshik	2026-Q2	99.35	4.16	105.5	Buyer-sourced	FAIL
AX-2026-043051	KP-2511-W5347	VendorInvestigate	2026-Q2	99.36	4.05	93.3	Buyer-sourced	FAIL

Batch rollup and reproducibility assessment →

Cross-sections

Other recent 5-Amino-1MQ records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043050	KP	KP-2511-W5347	Janoshik	2026-Q2	99.35	4.16	105.5	Buyer-sourced	0	FAIL
AX-2026-043044	KP	KP-2511-W5347	PeptideMeter	2026-Q2	99.61	4.15	90.9	Buyer-sourced	0	FAIL
AX-2026-043045	KP	KP-2511-W5347	Janoshik	2026-Q2	99.47	4.08	—	Buyer-sourced	0	FAIL
AX-2026-043043	KP	KP-2511-W5347	Janoshik	2026-Q2	99.58	4.16	101.1	Buyer-sourced	0	FAIL
AX-2026-042869	GGPeps	GGPE-2512-M2434	Kestrel	2026-Q2	99.55	4.65	103.9	Buyer-sourced	0	FAIL
AX-2026-042868	GGPeps	GGPE-2512-M2434	PeptideMeter	2026-Q2	99.32	4.39	88.5	Buyer-sourced	1	FAIL
AX-2026-043047	KP	KP-2511-W5347	Janoshik	2026-Q2	99.68	4.17	104.0	Supplier-supplied	0	FAIL
AX-2026-043051	KP	KP-2511-W5347	VendorInvestigate	2026-Q2	99.36	4.05	93.3	Buyer-sourced	0	FAIL

Other recent KP records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043095	Retatrutide	KP-2607-H5774	Janoshik	2026-Q3	95.81	5.48	105.2	Buyer-sourced	0	FAIL
AX-2026-043094	Retatrutide	KP-2607-H5774	PeptideMeter	2026-Q3	96.32	6.40	—	Buyer-sourced	0	FAIL
AX-2026-043096	Retatrutide	KP-2607-H5774	VendorInvestigate	2026-Q3	96.48	6.05	104.9	Buyer-sourced	0	FAIL
AX-2026-043090	Retatrutide	KP-2607-H5774	Janoshik	2026-Q3	96.46	5.81	—	Buyer-sourced	0	FAIL
AX-2026-043091	Retatrutide	KP-2607-H5774	Janoshik	2026-Q3	96.13	5.94	—	Buyer-sourced	0	FAIL
AX-2026-043077	TB-500	KP-2605-C5214	Janoshik	2026-Q2	99.61	5.64	90.2	Buyer-sourced	0	PASS
AX-2026-043093	Retatrutide	KP-2607-H5774	Janoshik	2026-Q3	96.54	5.54	—	Buyer-sourced	0	PASS
AX-2026-043092	Retatrutide	KP-2607-H5774	Medutest	2026-Q3	96.64	6.12	—	Buyer-sourced	1	FAIL