AX-2026-043140 · BPC-157 · SSA lot SSA-2601-N6863

Section 1

Results

Measured against the index acceptance specification for the tissue-repair and immunomodulatory 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	97.86	% area	≥ 98.0	FAIL
Total impurities	RP-HPLC, sum of reported peaks	2.14	% area	≤ 2.0	FAIL
Largest single impurity	RP-HPLC — acetylated N-terminus (+42 Da)	0.84	% area	≤ 1.00	PASS
Identity — theoretical monoisotopic mass	calculated from molecular formula	1418.7093	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, high resolution (ESI-TOF/QTOF)	1418.7077	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	-1.1	ppm	± 15	PASS
Total peptide content	by difference from the gravimetric mass balance	89.45	%w/w	—	NOT TESTED
Target-compound content	total peptide content × purity	87.54	%w/w	—	NOT TESTED
Gross fill (as weighed)	five-place balance, under nitrogen	2.42	mg	2 mg declared	NOT TESTED
Recovered target peptide	gross fill × target content	2.118	mg	2 mg claim	NOT TESTED
Recovery against label claim	recovered ÷ claim	105.9	%	90.0 – 110.0	PASS
Water content	Karl Fischer, coulometric, duplicate	4.85	%	≤ 10.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	5.27	%	≤ 12.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.43	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.48	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, colourless, no visible particulates	—	clear, no visible particulates	PASS
pH (reconstituted, 1 mg/mL)	potentiometric, two-point calibration	6.49	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 28 min gradient	9.06	min	9.03 ± 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	39,159	—	≥ 20,000	PASS
Resolution to nearest impurity	vs [D-Val]-diastereomer	0.70	—	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 39,159, 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 0.84 % impurity against a 97.86 % 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	BPC-157 — main peak	9.06	4,756,299	97.86	—
2	acetylated N-terminus (+42 Da)	9.51	40,827	0.84	+42.011
3	des-Gly truncate (−57 Da)	8.74	39,855	0.82	-57.021
4	truncated (1-12)	8.16	15,067	0.31	-285.132
5	BPC-157 arginine-salt artefact	8.55	5,832	0.12	0.000
6	pyroglutamate cyclisation (−17 Da)	9.35	1,458	0.03	-17.027
7	[D-Val]-diastereomer	8.93	972	0.02	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 1418.7093 Da, computed from C62H98N16O22. 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 1418.7077 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 (%)
3+	473.9104	473.9098	-0.0006	7.6
2+	710.3619	710.3611	-0.0008	55.9
1+	1419.7166	1419.7150	-0.0016	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	4.85
Counter-ion (acetate)	ion chromatography	5.27
Residual solvent + inorganic residue	estimated	0.43
Total peptide content	by difference	89.45
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)	97.5	97.86	divergence -0.53 pp vs batch median
Total impurities (% area)	not stated	2.14
Largest single impurity (% area)	not stated	0.84
Water (%)	3.6	4.85
Counter-ion (%)	8.3	5.27
Peptide content (%w/w)	87.5	89.45
Endotoxin (EU/mg)	0.47	0.48
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, 12 d) → laboratory (courier, ambient, 9 d) → assay.
Assay date: 21 May 2026
Submitted to the index: 31 May 2026
Laboratory: PeptideMeter, Tallinn, Estonia
Method basis: 28 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 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.

resin_loading31 May 2026

High resin substitution on a difficult sequence produces on-resin aggregation, and on-resin aggregation produces exactly this impurity pattern. It is a fixable process parameter and one of the commonest causes of a result in this band.

mass_defect31 May 2026

Before assigning acetylated N-terminus (+42 Da) from retention alone, check the mass defect on the impurity peak. Plausible and implausible assignments separate cleanly and the check costs nothing.

macrolactam31 May 2026

Where the sequence is cyclised, the uncyclised precursor elutes early and is easy to mistake for a truncation. The mass distinguishes the two and this record carries one, so the check costs nothing.

ms_confirm31 May 2026

Mass defect is where it should be for a peptide of this composition. Nothing in the impurity table has a defect inconsistent with its assignment either.

Section 7

Related records

Same batch — lot SSA-2601-N6863 n=15

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043130	SSA-2601-N6863	Janoshik	2026-Q2	97.57	4.69	100.4	Buyer-sourced	1	FAIL
AX-2026-043131	SSA-2601-N6863	Janoshik	2026-Q2	97.75	4.43	100.0	Buyer-sourced	1	FAIL
AX-2026-043132	SSA-2601-N6863	Janoshik	2026-Q2	98.03	4.34	—	Buyer-sourced	1	MARGINAL
AX-2026-043133	SSA-2601-N6863	Janoshik	2026-Q2	98.37	4.34	106.6	Supplier-supplied	1	MARGINAL
AX-2026-043134	SSA-2601-N6863	Medutest	2026-Q2	97.89	4.01	—	Buyer-sourced	1	FAIL
AX-2026-043135	SSA-2601-N6863	Nordanalyt	2026-Q2	98.16	4.66	92.8	Buyer-sourced	1	MARGINAL
AX-2026-043136	SSA-2601-N6863	Janoshik	2026-Q2	98.52	4.02	92.4	Buyer-sourced	1	MARGINAL
AX-2026-043137	SSA-2601-N6863	PeptideMeter	2026-Q2	98.17	4.14	—	Buyer-sourced	1	MARGINAL
AX-2026-043138	SSA-2601-N6863	VendorInvestigate	2026-Q2	97.99	4.20	90.1	Buyer-sourced	1	FAIL
AX-2026-043139	SSA-2601-N6863	Janoshik	2026-Q2	97.78	4.67	99.8	Buyer-sourced	1	FAIL
AX-2026-043141	SSA-2601-N6863	Janoshik	2026-Q2	98.06	4.06	94.6	Buyer-sourced	1	MARGINAL
AX-2026-043142	SSA-2601-N6863	Medutest	2026-Q2	98.19	4.83	95.2	Buyer-sourced	1	MARGINAL
AX-2026-043143	SSA-2601-N6863	Janoshik	2026-Q2	97.91	5.02	—	Buyer-sourced	1	FAIL
AX-2026-043144	SSA-2601-N6863	Janoshik	2026-Q2	98.08	4.74	—	Buyer-sourced	1	MARGINAL

Batch rollup and reproducibility assessment →

Cross-sections

Other recent BPC-157 records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043319	CPC	CPC-2602-W1610	Medutest	2026-Q3	98.82	2.88	103.5	Buyer-sourced	2	MARGINAL
AX-2026-041766	TFS	TFS-{CAT}-1156	Janoshik	2026-Q3	99.54	6.34	—	Buyer-sourced	1	MARGINAL
AX-2026-043445	BCH	BCH-2603-G4350	Nordanalyt	2026-Q3	98.42	4.87	93.6	Buyer-sourced	1	MARGINAL
AX-2026-043440	BCH	BCH-2603-G4350	VendorInvestigate	2026-Q3	98.61	4.11	—	Buyer-sourced	1	MARGINAL
AX-2026-043442	BCH	BCH-2603-G4350	Janoshik	2026-Q3	98.65	4.78	—	Buyer-sourced	1	MARGINAL
AX-2026-043449	BCH	BCH-2603-G4350	Kestrel	2026-Q3	99.74	4.92	91.3	Supplier-supplied	2	MARGINAL
AX-2026-043448	BCH	BCH-2603-G4350	Janoshik	2026-Q3	98.55	4.69	106.9	Buyer-sourced	1	MARGINAL
AX-2026-043318	CPC	CPC-2602-W1610	VendorInvestigate	2026-Q3	98.47	3.12	104.1	Buyer-sourced	1	MARGINAL

Other recent SSA records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043135	BPC-157	SSA-2601-N6863	Nordanalyt	2026-Q2	98.16	4.66	92.8	Buyer-sourced	1	MARGINAL
AX-2026-043160	GHK-Cu	SSA-2604-V7731	Janoshik	2026-Q2	98.01	4.02	91.8	Buyer-sourced	0	PASS
AX-2026-043157	GHK-Cu	SSA-2604-V7731	Medutest	2026-Q2	99.19	5.14	—	Supplier-supplied	0	PASS
AX-2026-043141	BPC-157	SSA-2601-N6863	Janoshik	2026-Q2	98.06	4.06	94.6	Buyer-sourced	1	MARGINAL
AX-2026-043154	GHK-Cu	SSA-2604-V7731	PeptideMeter	2026-Q2	97.82	4.82	101.6	Buyer-sourced	0	PASS
AX-2026-043137	BPC-157	SSA-2601-N6863	PeptideMeter	2026-Q2	98.17	4.14	—	Buyer-sourced	1	MARGINAL
AX-2026-043162	GHK-Cu	SSA-2604-V7731	Janoshik	2026-Q2	98.50	4.36	—	Supplier-supplied	0	PASS
AX-2026-043134	BPC-157	SSA-2601-N6863	Medutest	2026-Q2	97.89	4.01	—	Buyer-sourced	1	FAIL