AssayIndex

SNP-2603-G4042

Retatrutide · 30 mg declared · SinoPep Biotechnology (Changzhou) Co., Ltd. · manufactured 02 Mar 2026

CHARACTERISEDSHARED BULK
Lot code
SNP-2603-G4042
Supplier
SinoPep — SinoPep Biotechnology (Changzhou) Co., Ltd.
Compound
Retatrutide
Compound class
Incretin analogues and co-agonists
Declared label claim
30mg
Manufacture date
02 Mar 2026
Index quarter
2026-Q1
Independent assays
12
Laboratories involved
Nordanalyt, Janoshik, Medutest, Kestrel, VendorInvestigate
Provenance mix
Buyer-sourced ×12
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 97.58% n=12
Spread (max − min) 0.67pp n=12
Standard deviation 0.187pp n=12
95.596.397.197.998.799.5100.3This lot (SNP-2603-G4042)This lot (SNP-2603-G4042): Q1 97.50, median 97.58, Q3 97.71, n=12n=12All RetatrutideAll Retatrutide: Q1 97.96, median 98.37, Q3 98.82, n=492outlier 95.81outlier 96.13outlier 96.29outlier 96.32outlier 96.46outlier 96.48outlier 96.52outlier 96.54outlier 96.54outlier 96.63outlier 96.64n=492 Purity (% area)
Figure 1. This lot's independent purity results against the whole Retatrutide record set in the index. The vertical line is the index acceptance specification for the incretin analogues and co-agonists class, 96.5 % 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-2026-041869SNP-2603-G4042Nordanalyt2026-Q197.625.52101.1Buyer-sourced1MARGINAL
AX-2026-041870SNP-2603-G4042Janoshik2026-Q197.295.12Buyer-sourced1MARGINAL
AX-2026-041871SNP-2603-G4042Medutest2026-Q197.705.92103.4Buyer-sourced1MARGINAL
AX-2026-041872SNP-2603-G4042Janoshik2026-Q197.755.33106.2Buyer-sourced2FAIL
AX-2026-041873SNP-2603-G4042Kestrel2026-Q197.965.0697.2Buyer-sourced1MARGINAL
AX-2026-041874SNP-2603-G4042Janoshik2026-Q197.835.56Buyer-sourced1MARGINAL
AX-2026-041875SNP-2603-G4042VendorInvestigate2026-Q197.595.40Buyer-sourced1MARGINAL
AX-2026-041876SNP-2603-G4042Janoshik2026-Q197.525.7989.8Buyer-sourced2MARGINAL
AX-2026-041877SNP-2603-G4042Janoshik2026-Q197.525.67Buyer-sourced1FAIL
AX-2026-041878SNP-2603-G4042Nordanalyt2026-Q197.424.84Buyer-sourced1MARGINAL
AX-2026-041879SNP-2603-G4042Janoshik2026-Q197.565.5396.9Buyer-sourced1MARGINAL
AX-2026-041880SNP-2603-G4042Medutest2026-Q197.445.22Buyer-sourced1MARGINAL
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
Nordanalyt297.62, 97.4297.5235min+0.0297.50
Janoshik697.29, 97.75, 97.83, 97.52, 97.52, 97.5697.5430min+0.0097.54
Medutest297.70, 97.4497.5725min+0.0897.49
Kestrel197.9697.9615min+0.2497.72
VendorInvestigate197.5997.5932min-0.1197.70

This lot contributes 10 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)97.2297.62divergence -0.36 pp vs batch median
Total impurities (% area)2.782.38
Largest single impurity (% area)1.231.56
Water (%)3.65.52
Counter-ion (%)7.57.80
Peptide content (%w/w)88.386.06
Endotoxin (EU/mg)0.84not 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
[D-Aib2]-diastereomer12 / 120.700.07–1.61
truncated (5-39)12 / 121.040.46–1.88
des-Aib20 analogue12 / 120.180.16–0.20
oxidised Trp (+16 Da)12 / 120.060.04–0.07
incomplete Fmoc removal (+222 Da)12 / 120.180.03–0.39
retatrutide dimer12 / 120.050.01–0.10
Section 6

Shared-bulk links

Rule AX-R09. Where impurity fingerprints and latent composition match across companies, the index treats the material as one bulk and counts it once in aggregates.

LotSold byRoleReportsMedian purity
TFC-2409-H3000TFCparent bulk597.70
SNP-2603-G4042SinoPepthis lot1297.58
Section 7

What this rollup does not establish