AX-2026-042152

Semax · 5 mg declared · Guangzhou JEEP Biotechnology Co., Ltd. · lot JEEP-2512-U8593

PASSPURITY ONLY

Report ID: AX-2026-042152
Compound: Semax
Compound class: Neuroactive and cognitive peptides
Supplier: JEEP — Guangzhou JEEP Biotechnology Co., Ltd.
Batch / lot: JEEP-2512-U8593
Declared label claim: 5mg
Laboratory: Medutest
Assay date: 12 Feb 2026
Submitted: 18 Feb 2026
Quarter: 2026-Q1
Submitter: a.bhattacharya
Sample provenance: Buyer-sourced

Section 1

Results

Measured against the index acceptance specification for the neuroactive and cognitive 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	99.39	% area	≥ 98.5	PASS
Total impurities	RP-HPLC, sum of reported peaks	0.61	% area	≤ 1.5	PASS
Largest single impurity	RP-HPLC — Met1 sulfoxide (+16 Da)	0.38	% area	≤ 1.00	PASS
Identity	not ordered on this submission	not determined	—	required for VERIFIED status	NOT TESTED
Peptide content	not ordered on this submission	not determined	—	required to check label claim	NOT TESTED
Water content	Karl Fischer, coulometric, duplicate	6.72	%	≤ 12.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	7.45	%	≤ 10.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.81	%	—	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	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	5.52	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 25 min gradient	5.91	min	5.98 ± 0.25 (normalised)	PASS
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	1.00	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	63,588	—	≥ 20,000	PASS
Resolution to nearest impurity	vs diketopiperazine (−18 Da)	1.39	—	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 63,588, and skew follows the reported asymmetry factor of 1.00. 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 0.38 % impurity against a 99.39 % 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	Semax — main peak	5.91	4,830,662	99.39	—
2	Met1 sulfoxide (+16 Da)	5.61	18,469	0.38	+15.995
3	N-acetyl semax (+42 Da)	6.26	5,346	0.11	+42.011
4	des-Met (−131 Da)	6.08	3,888	0.08	-131.040
5	diketopiperazine (−18 Da)	6.04	1,944	0.04	-18.011
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 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.

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	99.39	divergence +0.31 pp vs batch median
Total impurities (% area)	not stated	0.61
Largest single impurity (% area)	not stated	0.38
Water (%)	not stated	6.72
Counter-ion (%)	2.8	7.45
Peptide content (%w/w)	93.1	not determined
Endotoxin (EU/mg)	0.32	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 (ambient, 18 d) → laboratory (courier, cold pack, 6 d) → assay.
Assay date: 12 Feb 2026
Submitted to the index: 18 Feb 2026
Laboratory: Medutest, Ljubljana, Slovenia
Method basis: 25 min gradient · unit-resolution MS
Verification status: PURITY ONLY

What this report does not establish

That the compound is the compound named. No identity confirmation was ordered on this submission. A purity figure describes chromatographic homogeneity of whatever eluted; it does not name it.
How much of the named compound is in the vial. Peptide content was not determined, so recovered mass cannot be calculated and the label claim cannot be checked.
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_gly18 Feb 2026

At 99.39 % 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.

scale_up_delta18 Feb 2026

Purity usually falls between gram and kilogram scale. A figure of 99.39 % on a commercial lot rather than a laboratory batch is the more informative version of this result.

Section 7

Related records

Same batch — lot JEEP-2512-U8593 n=11

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-042151	JEEP-2512-U8593	Janoshik	2026-Q1	99.58	7.41	94.0	Buyer-sourced	0	PASS
AX-2026-042153	JEEP-2512-U8593	Medutest	2026-Q1	99.74	6.63	—	Buyer-sourced	0	PASS
AX-2026-042154	JEEP-2512-U8593	VendorInvestigate	2026-Q1	99.07	7.20	—	Buyer-sourced	0	PASS
AX-2026-042155	JEEP-2512-U8593	PeptideMeter	2026-Q1	99.93	7.41	107.0	Buyer-sourced	0	PASS
AX-2026-042156	JEEP-2512-U8593	Janoshik	2026-Q1	99.88	7.47	—	Buyer-sourced	0	PASS
AX-2026-042157	JEEP-2512-U8593	Janoshik	2026-Q1	99.53	7.88	—	Buyer-sourced	0	PASS
AX-2026-042158	JEEP-2512-U8593	Janoshik	2026-Q1	99.59	7.17	—	Laboratory-retained	0	PASS
AX-2026-042159	JEEP-2512-U8593	Janoshik	2026-Q1	99.50	7.32	—	Buyer-sourced	0	PASS
AX-2026-042160	JEEP-2512-U8593	Janoshik	2026-Q1	99.67	8.08	93.4	Buyer-sourced	0	PASS
AX-2026-042161	JEEP-2512-U8593	Medutest	2026-Q1	99.93	8.02	95.9	Buyer-sourced	1	FAIL

Batch rollup and reproducibility assessment →

Cross-sections

Other recent Semax records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Result
AX-2026-042519	Homopeptide	HOMO-2605-S5227	Medutest	2026-Q3	99.75	5.55	—	Buyer-sourced	PASS
AX-2026-042517	Homopeptide	HOMO-2605-S5227	Janoshik	2026-Q3	99.92	5.88	—	Buyer-sourced	PASS
AX-2026-042518	Homopeptide	HOMO-2605-S5227	Janoshik	2026-Q3	99.76	5.61	—	Buyer-sourced	PASS
AX-2026-042524	Homopeptide	HOMO-2605-S5227	Janoshik	2026-Q3	99.93	5.75	100.9	Supplier-supplied	PASS
AX-2026-042516	Homopeptide	HOMO-2605-S5227	Janoshik	2026-Q3	99.93	5.87	95.1	Buyer-sourced	PASS
AX-2026-042522	Homopeptide	HOMO-2605-S5227	Nordanalyt	2026-Q3	99.93	5.49	—	Buyer-sourced	PASS
AX-2026-042520	Homopeptide	HOMO-2605-S5227	Medutest	2026-Q3	99.93	6.12	—	Buyer-sourced	PASS
AX-2026-042514	Homopeptide	HOMO-2605-S5227	Janoshik	2026-Q3	99.59	5.48	97.0	Buyer-sourced	PASS

Other recent JEEP records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-042177	Hexarelin	JEEP-2608-Y9547	Janoshik	2026-Q3	99.90	3.42	—	Buyer-sourced	0	PASS
AX-2026-042162	Semaglutide	JEEP-2607-X9091	Janoshik	2026-Q3	98.98	3.46	—	Laboratory-retained	1	MARGINAL
AX-2026-042127	TB-500	JEEP-2602-V8614	Medutest	2026-Q3	99.68	3.55	—	Buyer-sourced	1	FAIL
AX-2026-042123	TB-500	JEEP-2602-V8614	PeptideMeter	2026-Q3	99.93	3.80	—	Buyer-sourced	0	PASS
AX-2026-042124	TB-500	JEEP-2602-V8614	PeptideMeter	2026-Q3	99.91	3.37	104.9	Buyer-sourced	0	PASS
AX-2026-042178	Hexarelin	JEEP-2608-Y9547	VendorInvestigate	2026-Q3	99.68	4.03	—	Buyer-sourced	0	PASS
AX-2026-042163	Semaglutide	JEEP-2607-X9091	Nordanalyt	2026-Q3	99.46	4.52	—	Buyer-sourced	1	MARGINAL
AX-2026-042122	TB-500	JEEP-2602-V8614	PeptideMeter	2026-Q3	99.60	3.58	97.0	Buyer-sourced	0	PASS