AssayIndex

ERP-2604-W7280

Tesamorelin · 1 mg declared · Shanghai ERP Biotechnology Co., Ltd. · manufactured 17 Apr 2026

CHARACTERISED
Lot code
ERP-2604-W7280
Supplier
ERP — Shanghai ERP Biotechnology Co., Ltd.
Compound
Tesamorelin
Compound class
Growth-hormone axis peptides
Declared label claim
1mg
Manufacture date
17 Apr 2026
Index quarter
2026-Q3
Independent assays
12
Laboratories involved
Janoshik, PeptideMeter, Kestrel, VendorInvestigate
Provenance mix
Buyer-sourced ×2 · Supplier-supplied ×10
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 98.80% n=12
Spread (max − min) 1.46pp n=12
Standard deviation 0.423pp n=12
95.696.497.197.898.699.3100.0This lot (ERP-2604-W7280)This lot (ERP-2604-W7280): Q1 98.53, median 98.80, Q3 99.17, n=12n=12All TesamorelinAll Tesamorelin: Q1 97.05, median 98.43, Q3 98.80, n=21n=21 Purity (% area)
Figure 1. This lot's independent purity results against the whole Tesamorelin record set in the index. The vertical line is the index acceptance specification for the growth-hormone axis peptides class, 97.0 % 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-2026-042534ERP-2604-W7280Janoshik2026-Q399.063.9092.8Supplier-supplied1MARGINAL
AX-2026-042535ERP-2604-W7280Janoshik2026-Q399.193.8992.7Supplier-supplied1MARGINAL
AX-2026-042536ERP-2604-W7280Janoshik2026-Q398.434.33107.5Supplier-supplied2FAIL
AX-2026-042537ERP-2604-W7280PeptideMeter2026-Q398.523.9594.1Supplier-supplied1MARGINAL
AX-2026-042538ERP-2604-W7280Kestrel2026-Q398.264.37Supplier-supplied1MARGINAL
AX-2026-042539ERP-2604-W7280Janoshik2026-Q398.774.3089.9Buyer-sourced2MARGINAL
AX-2026-042540ERP-2604-W7280Kestrel2026-Q399.723.47103.2Supplier-supplied1MARGINAL
AX-2026-042541ERP-2604-W7280PeptideMeter2026-Q398.793.70Supplier-supplied1MARGINAL
AX-2026-042542ERP-2604-W7280Janoshik2026-Q398.544.58103.1Supplier-supplied2FAIL
AX-2026-042543ERP-2604-W7280PeptideMeter2026-Q399.164.03Supplier-supplied0PASS
AX-2026-042544ERP-2604-W7280VendorInvestigate2026-Q398.803.88Buyer-sourced2FAIL
AX-2026-042545ERP-2604-W7280Janoshik2026-Q399.323.85101.4Supplier-supplied2FAIL
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
Janoshik699.06, 99.19, 98.43, 98.77, 98.54, 99.3298.9130min+0.0098.91
PeptideMeter398.52, 98.79, 99.1698.7928min-0.0598.84
Kestrel298.26, 99.7298.9915min+0.2498.75
VendorInvestigate198.8098.8032min-0.1198.91

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)98.7999.06divergence -0.01 pp vs batch median
Total impurities (% area)1.210.94
Largest single impurity (% area)not stated0.52
Water (%)not stated3.90
Counter-ion (%)not stated3.84
Peptide content (%w/w)91.791.81
Endotoxin (EU/mg)not statednot 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
Met sulfoxide (+16 Da)12 / 120.150.06–0.97
des-hexenoyl GRF (1-44) (−96 Da)12 / 120.440.08–0.90
truncated (1-40)12 / 120.060.03–0.16
deamidated (+1 Da)12 / 120.160.01–0.39
Section 7

What this rollup does not establish