AX-2024-005352 · N-Acetyl Semax Amide · SGN lot SGN-2407-R9967

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, 32 min gradient, 214 nm	97.31	% area	≥ 98.5	FAIL
Total impurities	RP-HPLC, sum of reported peaks	2.69	% area	≤ 1.5	FAIL
Largest single impurity	RP-HPLC — N-acetyl semax free acid (+1 Da)	1.08	% area	≤ 1.00	FAIL
Identity — theoretical monoisotopic mass	calculated from molecular formula	854.3806	Da	—	NOT TESTED
Identity — observed monoisotopic mass	LC-MS, high resolution (ESI-TOF/QTOF)	854.3773	Da	—	NOT TESTED
Mass accuracy	observed vs theoretical	-3.9	ppm	± 15	PASS
Peptide content	not ordered on this submission	not determined	—	required to check label claim	NOT TESTED
Water content	Karl Fischer, coulometric, duplicate	7.98	%	≤ 12.0	PASS
Counter-ion (acetate)	anion-exchange ion chromatography	6.03	%	≤ 10.0	PASS
Residual solvent + inorganic residue	estimated — see /methods/residual-solvents-q3c/	0.75	%	—	NOT TESTED
Endotoxin	kinetic chromogenic LAL	0.40	EU/mg	≤ 5.0	PASS
Sterility	membrane filtration, USP <71>, 14 d	No growth at 14 d	—	no growth	PASS
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	5.23	—	2.5 – 8.0	PASS
Retention time (observed)	RP-HPLC, 32 min gradient	8.81	min	8.09 ± 0.25 (normalised)	FAIL
Peak asymmetry (10 % height)	Ph. Eur. 2.2.46	0.93	—	0.80 – 1.50	PASS
Plate count, main peak	N = 5.54 (t/w½)²	86,039	—	≥ 20,000	PASS
Resolution to nearest impurity	vs N-acetyl semax free acid (+1 Da)	1.91	—	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, 32 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 86,039, and skew follows the reported asymmetry factor of 0.93. 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 1.08 % impurity against a 97.31 % 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	N-Acetyl Semax Amide — main peak	8.81	4,729,568	97.31	—
2	N-acetyl semax free acid (+1 Da)	9.04	52,491	1.08	+0.984
3	Met sulfoxide (+16 Da)	8.45	35,966	0.74	+15.995
4	semax (des-acetyl, des-amide, −41 Da)	8.21	24,302	0.50	-41.027
5	des-acetyl amide (−42 Da)	8.38	17,983	0.37	-42.011
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 854.3806 Da, computed from C39H54N10O10S. 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 854.3773 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 (%)
2+	428.1976	428.1959	-0.0017	51.5
1+	855.3879	855.3846	-0.0033	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.

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)	99.05	97.31	divergence +0.54 pp vs batch median
Total impurities (% area)	0.95	2.69
Largest single impurity (% area)	not stated	1.08
Water (%)	6.5	7.98
Counter-ion (%)	5.8	6.03
Peptide content (%w/w)	87.1	not determined
Endotoxin (EU/mg)	not stated	0.40
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, 22 d) → laboratory (hand-carried, 9 d) → assay.
Assay date: 26 Jul 2024
Submitted to the index: 10 Aug 2024
Laboratory: VendorInvestigate, Riga, Latvia
Method basis: 32 min gradient · high-resolution MS
Verification status: VERIFIED

What this report does not establish

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 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 SGN-2407-R9967 n=9

Report	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2024-005345	SGN-2407-R9967	Janoshik	2024-Q3	98.51	8.31	91.8	Supplier-supplied	1	MARGINAL
AX-2024-005346	SGN-2407-R9967	PeptideMeter	2024-Q3	98.61	7.13	—	Supplier-supplied	1	MARGINAL
AX-2024-005347	SGN-2407-R9967	Janoshik	2024-Q3	98.71	7.84	—	Supplier-supplied	1	MARGINAL
AX-2024-005348	SGN-2407-R9967	Janoshik	2024-Q3	99.02	7.71	105.8	Supplier-supplied	1	MARGINAL
AX-2024-005349	SGN-2407-R9967	Kestrel	2024-Q3	97.97	7.65	—	Buyer-sourced	0	FAIL
AX-2024-005350	SGN-2407-R9967	Janoshik	2024-Q3	98.51	7.90	—	Supplier-supplied	1	MARGINAL
AX-2024-005351	SGN-2407-R9967	Janoshik	2024-Q3	98.23	8.45	—	Supplier-supplied	1	FAIL
AX-2024-005353	SGN-2407-R9967	Janoshik	2024-Q3	98.57	8.03	—	Supplier-supplied	1	MARGINAL

Batch rollup and reproducibility assessment →

Cross-sections

Other recent N-Acetyl Semax Amide records in the index.
Report	Supplier	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043368	CPC	CPC-2602-D2941	Medutest	2026-Q3	98.79	6.05	102.1	Supplier-supplied	0	PASS
AX-2026-043574	BCH	BCH-2602-E8253	Janoshik	2026-Q3	97.75	8.85	97.9	Supplier-supplied	1	FAIL
AX-2026-043575	BCH	BCH-2602-E8253	Janoshik	2026-Q3	97.44	9.19	104.8	Supplier-supplied	1	FAIL
AX-2026-043367	CPC	CPC-2602-D2941	Nordanalyt	2026-Q3	99.39	6.16	92.4	Supplier-supplied	0	PASS
AX-2026-043573	BCH	BCH-2602-E8253	Janoshik	2026-Q3	97.47	8.59	—	Supplier-supplied	1	FAIL
AX-2026-043576	BCH	BCH-2602-E8253	Janoshik	2026-Q3	97.46	9.53	92.4	Laboratory-retained	1	FAIL
AX-2026-042746	GGPeps	GGPE-2512-A1206	PeptideMeter	2026-Q2	98.97	6.67	—	Supplier-supplied	2	MARGINAL
AX-2026-042234	Homopeptide	HOMO-2603-C1382	Janoshik	2026-Q2	98.99	8.00	99.6	Supplier-supplied	0	PASS

Other recent SGN records in the index.
Report	Compound	Lot	Lab	Quarter	Purity %	Water %	Recovery %	Provenance	Flags	Result
AX-2026-043215	Afamelanotide	SGN-2602-Y9898	PeptideMeter	2026-Q3	98.92	3.40	—	Supplier-supplied	1	MARGINAL
AX-2026-043214	Afamelanotide	SGN-2602-Y9898	Janoshik	2026-Q3	99.19	3.41	106.9	Supplier-supplied	1	MARGINAL
AX-2026-043240	Melanotan II	SGN-2602-L1809	PeptideMeter	2026-Q2	98.65	2.87	—	Supplier-supplied	2	MARGINAL
AX-2026-043255	BPC-157	SGN-2512-H1950	Janoshik	2026-Q2	99.06	4.99	—	Supplier-supplied	2	MARGINAL
AX-2026-043242	Melanotan II	SGN-2602-L1809	VendorInvestigate	2026-Q2	98.14	2.18	107.2	Buyer-sourced	1	FAIL
AX-2026-043221	SLU-PP-332	SGN-2602-X9969	Kestrel	2026-Q2	98.70	5.87	—	Supplier-supplied	0	PASS
AX-2026-043245	Melanotan II	SGN-2602-L1809	Janoshik	2026-Q2	98.54	2.19	100.6	Supplier-supplied	2	MARGINAL
AX-2026-043244	Melanotan II	SGN-2602-L1809	Janoshik	2026-Q2	99.24	2.68	98.0	Supplier-supplied	1	MARGINAL