AssayIndex

TFC-2608-J6715

Retatrutide · 30 mg declared · Tianjin Finder Chemical Co., Ltd. · manufactured 25 Aug 2026

CHARACTERISED
Lot code
TFC-2608-J6715
Supplier
TFC — Tianjin Finder Chemical Co., Ltd.
Compound
Retatrutide
Compound class
Incretin analogues and co-agonists
Declared label claim
30mg
Manufacture date
25 Aug 2026
Index quarter
2026-Q3
Independent assays
13
Laboratories involved
VendorInvestigate, PeptideMeter, Medutest, Kestrel, Nordanalyt, Janoshik
Provenance mix
Buyer-sourced ×13
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 13
Median purity 98.28% n=13
Spread (max − min) 1.61pp n=13
Standard deviation 0.436pp n=13
95.696.497.197.998.799.5100.3This lot (TFC-2608-J6715)This lot (TFC-2608-J6715): Q1 97.94, median 98.28, Q3 98.47, n=13n=13All RetatrutideAll Retatrutide: Q1 98.07, median 98.46, Q3 98.86, n=508outlier 95.92outlier 96.11outlier 96.28outlier 96.30outlier 96.81outlier 96.88n=508 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 13

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-2026-042031TFC-2608-J6715VendorInvestigate2026-Q398.475.01Buyer-sourced0PASS
AX-2026-042032TFC-2608-J6715PeptideMeter2026-Q397.624.40105.4Buyer-sourced0PASS
AX-2026-042033TFC-2608-J6715VendorInvestigate2026-Q397.724.0495.6Buyer-sourced0PASS
AX-2026-042034TFC-2608-J6715PeptideMeter2026-Q397.995.07Buyer-sourced0PASS
AX-2026-042035TFC-2608-J6715PeptideMeter2026-Q398.464.3890.5Buyer-sourced0PASS
AX-2026-042036TFC-2608-J6715Medutest2026-Q398.494.55105.6Buyer-sourced0PASS
AX-2026-042037TFC-2608-J6715Kestrel2026-Q399.234.72Buyer-sourced0PASS
AX-2026-042038TFC-2608-J6715Nordanalyt2026-Q397.944.5495.4Buyer-sourced0PASS
AX-2026-042039TFC-2608-J6715Janoshik2026-Q398.134.02Buyer-sourced0PASS
AX-2026-042040TFC-2608-J6715PeptideMeter2026-Q398.304.08Buyer-sourced0PASS
AX-2026-042041TFC-2608-J6715Janoshik2026-Q398.284.5789.5Buyer-sourced2MARGINAL
AX-2026-042042TFC-2608-J6715Janoshik2026-Q398.634.1090.6Buyer-sourced0PASS
AX-2026-042043TFC-2608-J6715PeptideMeter2026-Q397.844.64Buyer-sourced0PASS
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
VendorInvestigate298.47, 97.7298.0932min-0.1198.20
PeptideMeter597.62, 97.99, 98.46, 98.30, 97.8497.9928min-0.0598.04
Medutest198.4998.4925min+0.0898.41
Kestrel199.2399.2315min+0.2498.99
Nordanalyt197.9497.9435min+0.0297.92
Janoshik398.13, 98.28, 98.6398.2830min+0.0098.28

This lot contributes 15 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)99.1098.47divergence +0.82 pp vs batch median
Total impurities (% area)not stated1.53
Largest single impurity (% area)not stated1.06
Water (%)2.45.01
Counter-ion (%)4.86.12
Peptide content (%w/w)92.2not determined
Endotoxin (EU/mg)0.240.28
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
C18 diacid regioisomer13 / 130.450.08–1.56
[D-Aib2]-diastereomer13 / 130.290.04–0.86
truncated (5-39)13 / 130.190.06–0.29
des-Aib20 analogue13 / 130.050.04–0.07
aspartimide (−18 Da)13 / 130.040.02–0.97
oxidised Trp (+16 Da)12 / 130.090.02–0.24
Section 7

What this rollup does not establish