AssayIndex

AX-2026-042829

BPC-157 · 2 mg declared · Nantong Guangyuan Chemical Co., Ltd. · lot GGPE-2512-N1746

PASSVERIFIED
Report ID
AX-2026-042829
Compound
BPC-157
Compound class
Tissue-repair and immunomodulatory peptides
Supplier
GGPeps — Nantong Guangyuan Chemical Co., Ltd.
Batch / lot
GGPE-2512-N1746
Declared label claim
2mg
Laboratory
Nordanalyt Laboratories
Assay date
27 Jan 2026
Submitted
03 Feb 2026
Quarter
2026-Q1
Submitter
z.moreau
Sample provenance
Supplier-supplied
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.

ParameterMethodResultUnitIndex spec
PurityRP-HPLC, 35 min gradient, 214 nm99.45% area≥ 98.0PASS
Total impuritiesRP-HPLC, sum of reported peaks0.55% area≤ 2.0PASS
Largest single impurityRP-HPLC — acetylated N-terminus (+42 Da)0.21% area≤ 1.00PASS
Identity — theoretical monoisotopic masscalculated from molecular formula1418.7093Da—NOT TESTED
Identity — observed monoisotopic massLC-MS, high resolution (ESI-TOF/QTOF)1418.7056Da—NOT TESTED
Mass accuracyobserved vs theoretical-2.6ppm± 15PASS
Total peptide contentby difference from the gravimetric mass balance85.00%w/w—NOT TESTED
Target-compound contenttotal peptide content × purity84.53%w/w—NOT TESTED
Gross fill (as weighed)five-place balance, under nitrogen2.35mg2 mg declaredNOT TESTED
Recovered target peptidegross fill × target content1.986mg2 mg claimNOT TESTED
Recovery against label claimrecovered ÷ claim99.3%90.0 – 110.0PASS
Water contentKarl Fischer, coulometric, duplicate6.84%≤ 10.0PASS
Counter-ion (acetate)anion-exchange ion chromatography7.54%≤ 12.0PASS
Residual solvent + inorganic residueestimated — see /methods/residual-solvents-q3c/0.62%—NOT TESTED
Endotoxinkinetic chromogenic LAL0.42EU/mg≤ 5.0PASS
Sterilitymembrane filtration, USP <71>, 14 dNo growth at 14 d—no growthPASS
Appearancevisual, diffuse light, black and white backgroundWhite to pale-yellow cake, intact—white to off-white intact cakePASS
Reconstitution clarityreconstituted per submitter procedureClear, colourless, no visible particulates—clear, no visible particulatesPASS
pH (reconstituted, 1 mg/mL)potentiometric, two-point calibration4.50—2.5 – 8.0PASS
Retention time (observed)RP-HPLC, 35 min gradient11.05min11.10 ± 0.25 (normalised)PASS
Peak asymmetry (10 % height)Ph. Eur. 2.2.461.04—0.80 – 1.50PASS
Plate count, main peakN = 5.54 (t/w½)²49,836—≥ 20,000PASS
Resolution to nearest impurityvs pyroglutamate cyclisation (−17 Da)1.78—no index criterionREPORTED
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.

02280456068409120 BPC-15711.05 min · 99.45 % 11.61 same trace · ×200 vertical expansion, baseline-corrected · main peak off-scale reporting threshold 0.05 % area 0510152025303540 Retention time (min) Response (mAU)
Figure 1. RP-HPLC trace, 35 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 49,836, and skew follows the reported asymmetry factor of 1.04. 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 0.21 % impurity against a 99.45 % main peak is a line two pixels tall; the main peak runs off-scale there by design.
#PeakRTArea (µV·s)% areaΔ mass (Da)
1BPC-157 — main peak11.054,833,57899.45—
2acetylated N-terminus (+42 Da)11.6110,2070.21+42.011
3BPC-157 arginine-salt artefact10.417,2900.150.000
4pyroglutamate cyclisation (−17 Da)11.415,3460.11-17.027
5des-Gly truncate (−57 Da)10.653,8880.08-57.021
Closure check — purity + Σ impurities 100.00CLOSES

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.

0255075100350550750950115013501550 [M+1H]1+1419.71[M+2H]2+710.36 m/z Relative abundance (%)
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 1418.7056 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.
ChargeTheoretical m/zObserved m/zΔ m/zRel. abundance (%)
3+473.9104473.9091-0.00138.7
2+710.3619710.3601-0.001850.2
1+1419.71661419.7129-0.0037100.0
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.

ComponentDetermination%w/w of cake
WaterKarl Fischer6.84
Counter-ion (acetate)ion chromatography7.54
Residual solvent + inorganic residueestimated0.62
Total peptide contentby difference85.00
Total100.00 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.

FigureSupplier COAThis reportIndex note
Purity (% area)99.7899.45divergence +0.35 pp vs batch median
Total impurities (% area)not stated0.55
Largest single impurity (% area)not stated0.21
Water (%)5.86.84
Counter-ion (%)3.17.54
Peptide content (%w/w)90.585.00
Endotoxin (EU/mg)not stated0.42
Method stated on certificateNO—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
Supplier-supplied
Evidentiary weight
Weaker evidence. Read with the caveat below.
Chain of custody
Supplier despatch → laboratory direct (courier, cold pack, 10 d) → assay. Submitter did not handle the vial.
Assay date
27 Jan 2026
Submitted to the index
03 Feb 2026
Laboratory
Nordanalyt Laboratories, Uppsala, Sweden
Method basis
35 min gradient · high-resolution MS
Verification status
VERIFIED
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 GGPE-2512-N1746 n=9

ReportLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-042827GGPE-2512-N1746Medutest2026-Q199.436.71—Supplier-supplied0PASS
AX-2026-042828GGPE-2512-N1746VendorInvestigate2026-Q198.826.8690.7Buyer-sourced0PASS
AX-2026-042830GGPE-2512-N1746Nordanalyt2026-Q199.436.65—Supplier-supplied0PASS
AX-2026-042831GGPE-2512-N1746PeptideMeter2026-Q199.486.9494.4Supplier-supplied0PASS
AX-2026-042832GGPE-2512-N1746Janoshik2026-Q199.657.00102.7Supplier-supplied0PASS
AX-2026-042833GGPE-2512-N1746Janoshik2026-Q198.616.4189.7Supplier-supplied2MARGINAL
AX-2026-042834GGPE-2512-N1746Janoshik2026-Q199.136.9388.6Buyer-sourced2FAIL
AX-2026-042835GGPE-2512-N1746Janoshik2026-Q199.296.90106.5Buyer-sourced1MARGINAL

Cross-sections

Other recent BPC-157 records in the index.
ReportSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-041387WWBWWB-2606-H3906Janoshik2026-Q398.954.64—Laboratory-retained1MARGINAL
AX-2026-043365CPCCPC-2602-W2646Medutest2026-Q398.562.80—Supplier-supplied1MARGINAL
AX-2026-041385WWBWWB-2606-H3906Medutest2026-Q399.314.31—Supplier-supplied1MARGINAL
AX-2026-043503BCHBCH-2603-G6422Janoshik2026-Q398.464.32—Supplier-supplied1MARGINAL
AX-2026-041390WWBWWB-2606-H3906Medutest2026-Q399.474.8499.3Supplier-supplied1MARGINAL
AX-2026-041386WWBWWB-2606-H3906VendorInvestigate2026-Q399.324.8899.2Buyer-sourced1MARGINAL
AX-2026-041380WWBWWB-2606-H3906PeptideMeter2026-Q399.454.52—Supplier-supplied1MARGINAL
AX-2026-041383WWBWWB-2606-H3906PeptideMeter2026-Q399.174.8491.2Supplier-supplied1MARGINAL
Other recent GGPeps records in the index.
ReportCompoundLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-042737SelankGGPE-2603-J9708Janoshik2026-Q398.409.1497.4Buyer-sourced0FAIL
AX-2026-042804SelankGGPE-2602-G2056Janoshik2026-Q398.507.97—Supplier-supplied0FAIL
AX-2026-042803SelankGGPE-2602-G2056Janoshik2026-Q398.488.01—Laboratory-retained1FAIL
AX-2026-042802SelankGGPE-2602-G2056Janoshik2026-Q398.747.0996.0Supplier-supplied0FAIL
AX-2026-042796SelankGGPE-2602-G2056Janoshik2026-Q398.267.5697.5Buyer-sourced0FAIL
AX-2026-042648Melanotan IIGGPE-2603-P8735Janoshik2026-Q399.106.97—Supplier-supplied4MARGINAL
AX-2026-042797SelankGGPE-2602-G2056Medutest2026-Q398.467.92—Buyer-sourced0FAIL
AX-2026-042669CJC-1295 (no DAC)GGPE-2606-E8495Medutest2026-Q398.614.0695.5Supplier-supplied0PASS