AssayIndex

SSA-2505-U6896

PEG-MGF · 5 mg declared · Shanghai Sigma-Audley New Material Technology Co., Ltd. · manufactured 08 May 2025

CHARACTERISED
Lot code
SSA-2505-U6896
Supplier
SSA — Shanghai Sigma-Audley New Material Technology Co., Ltd.
Compound
PEG-MGF
Compound class
Growth-hormone axis peptides
Declared label claim
5mg
Manufacture date
08 May 2025
Index quarter
2025-Q4
Independent assays
12
Laboratories involved
VendorInvestigate, PeptideMeter, Medutest, Janoshik
Provenance mix
Buyer-sourced ×4 · Supplier-supplied ×8
Section 1

Reproducibility across independent tests

Every report below is an observation of the same physical material. What they disagree about is measurement; what they agree about is the lot. The size of the disagreement is compared against what the contributing laboratories' own repeatability figures predict.

Independent assays 12
Median purity 95.86% n=12
Spread (max − min) 0.79pp n=12
Standard deviation 0.252pp n=12
95.395.996.597.197.798.398.9This lot (SSA-2505-U6896)This lot (SSA-2505-U6896): Q1 95.69, median 95.86, Q3 96.07, n=12n=12All PEG-MGFAll PEG-MGF: Q1 96.08, median 97.92, Q3 98.19, n=35n=35 Purity (% area)
Figure 1. This lot's independent purity results against the whole PEG-MGF record set in the index. The vertical line is the index acceptance specification for the growth-hormone axis peptides class, 92.0 % area. A narrow box on the top row against a wide box on the bottom row is the ideal reading: it means the disagreement between lots is much larger than the disagreement within this one.
Section 2

Member reports 12

Every report the index holds on this lot. Each is a page carrying its own chromatogram, mass spectrum, mass balance, provenance and caveats.

ReportLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2025-020573SSA-2505-U6896VendorInvestigate2025-Q496.092.75Buyer-sourced0PASS
AX-2025-020574SSA-2505-U6896PeptideMeter2025-Q495.512.8897.4Supplier-supplied0PASS
AX-2025-020575SSA-2505-U6896Medutest2025-Q496.042.63Supplier-supplied1FAIL
AX-2025-020576SSA-2505-U6896Medutest2025-Q496.302.53Supplier-supplied0PASS
AX-2025-020577SSA-2505-U6896VendorInvestigate2025-Q495.712.67Buyer-sourced0PASS
AX-2025-020578SSA-2505-U6896Janoshik2025-Q495.553.57Buyer-sourced0PASS
AX-2025-020579SSA-2505-U6896Janoshik2025-Q496.062.5999.2Supplier-supplied0PASS
AX-2025-020580SSA-2505-U6896Medutest2025-Q495.902.63Supplier-supplied0PASS
AX-2026-043130SSA-2505-U6896VendorInvestigate2025-Q496.172.67Buyer-sourced0PASS
AX-2025-020581SSA-2505-U6896Janoshik2025-Q495.652.50Supplier-supplied0PASS
AX-2026-043131SSA-2505-U6896Janoshik2025-Q495.812.9596.2Supplier-supplied0PASS
AX-2025-020582SSA-2505-U6896PeptideMeter2025-Q495.822.9092.7Supplier-supplied0PASS
Section 3

By laboratory

Where more than one laboratory assayed this lot, the difference between them is a paired observation of their relative bias — the same material, the same time window, different instruments. Those pairs are what the index's bias estimates are built from.

LaboratoryReportsPurity results (% area)MedianGradientPublished bias (pp)Bias-adjusted
VendorInvestigate396.09, 95.71, 96.1796.0932min-0.1196.20
PeptideMeter295.51, 95.8295.6628min-0.0595.71
Medutest396.04, 96.30, 95.9096.0425min+0.0895.96
Janoshik495.55, 96.06, 95.65, 95.8195.7330min+0.0095.73

This lot contributes 6 paired comparisons to the inter-lab analysis.

Section 4

The supplier's certificate for this lot

One number the supplier wrote, beside the median of the numbers other people measured on the same physical material. That comparison is only available because the index groups by lot.

FigureSupplier COAThis reportIndex note
Purity (% area)96.5696.09divergence +0.70 pp vs batch median
Total impurities (% area)not stated3.91
Largest single impurity (% area)not stated2.20
Water (%)not stated2.75
Counter-ion (%)5.41.82
Peptide content (%w/w)90.5not determined
Endotoxin (EU/mg)0.35not determined
Method stated on certificateYEScolumn, gradient and wavelength given
Section 5

Impurity fingerprint

The named impurities reported across this lot's assays, with how consistently each was seen. A fingerprint is what allows two lot numbers held by different companies to be identified as one bulk.

Named impurityReported inMedian % areaRange
hydrolysed linker12 / 121.210.23–2.42
free mPEG12 / 120.600.27–0.98
free MGF (unconjugated)12 / 120.640.43–0.97
di-PEGylated species12 / 121.410.37–2.91
Section 7

What this rollup does not establish