AssayIndex

FGP-2605-R1831

Tirzepatide · 30 mg declared · Flourishglobal Peptide Biotech (Chengdu) Co., Ltd. · manufactured 25 May 2026

CHARACTERISED
Lot code
FGP-2605-R1831
Supplier
FGP — Flourishglobal Peptide Biotech (Chengdu) Co., Ltd.
Compound
Tirzepatide
Compound class
Incretin analogues and co-agonists
Declared label claim
30mg
Manufacture date
25 May 2026
Index quarter
2026-Q2
Independent assays
15
Laboratories involved
Janoshik, Medutest, PeptideMeter, Nordanalyt, Kestrel, VendorInvestigate
Provenance mix
Buyer-sourced ×2 · Supplier-supplied ×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 15
Median purity 97.70% n=15
Spread (max − min) 1.89pp n=15
Standard deviation 0.447pp n=15
95.696.497.197.998.799.5100.3This lot (FGP-2605-R1831)This lot (FGP-2605-R1831): Q1 97.53, median 97.70, Q3 98.08, n=15n=15All TirzepatideAll Tirzepatide: Q1 97.85, median 98.44, Q3 99.08, n=576outlier 95.92n=576 Purity (% area)
Figure 1. This lot's independent purity results against the whole Tirzepatide record set in the index. The vertical line is the index acceptance specification for the incretin analogues and co-agonists 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 15

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-2026-041801FGP-2605-R1831Janoshik2026-Q297.707.19Supplier-supplied2MARGINAL
AX-2026-041802FGP-2605-R1831Medutest2026-Q298.076.43Supplier-supplied2MARGINAL
AX-2026-041803FGP-2605-R1831PeptideMeter2026-Q298.266.01104.9Supplier-supplied2MARGINAL
AX-2026-041804FGP-2605-R1831Janoshik2026-Q297.676.4792.2Buyer-sourced2MARGINAL
AX-2026-041805FGP-2605-R1831PeptideMeter2026-Q297.496.00Supplier-supplied2MARGINAL
AX-2026-041806FGP-2605-R1831Janoshik2026-Q297.656.22Supplier-supplied2MARGINAL
AX-2026-041807FGP-2605-R1831Janoshik2026-Q298.116.4796.6Supplier-supplied2MARGINAL
AX-2026-041808FGP-2605-R1831PeptideMeter2026-Q297.955.9988.5Supplier-supplied3MARGINAL
AX-2026-041809FGP-2605-R1831Nordanalyt2026-Q297.486.7397.8Supplier-supplied2MARGINAL
AX-2026-041810FGP-2605-R1831Nordanalyt2026-Q297.586.8494.3Supplier-supplied2MARGINAL
AX-2026-041811FGP-2605-R1831Medutest2026-Q298.096.2189.8Supplier-supplied3MARGINAL
AX-2026-041812FGP-2605-R1831Kestrel2026-Q298.756.88Supplier-supplied2MARGINAL
AX-2026-041813FGP-2605-R1831PeptideMeter2026-Q297.376.17Supplier-supplied2MARGINAL
AX-2026-041814FGP-2605-R1831Janoshik2026-Q298.016.1990.1Supplier-supplied2MARGINAL
AX-2026-041815FGP-2605-R1831VendorInvestigate2026-Q296.866.01Buyer-sourced2FAIL
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
Janoshik597.70, 97.67, 97.65, 98.11, 98.0197.7030min+0.0097.70
Medutest298.07, 98.0998.0825min+0.0898.00
PeptideMeter498.26, 97.49, 97.95, 97.3797.7228min-0.0597.77
Nordanalyt297.48, 97.5897.5335min+0.0297.51
Kestrel198.7598.7515min+0.2498.51
VendorInvestigate196.8696.8632min-0.1196.97

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)98.4897.70divergence +0.78 pp vs batch median
Total impurities (% area)1.522.30
Largest single impurity (% area)0.741.12
Water (%)not stated7.19
Counter-ion (%)not stated6.84
Peptide content (%w/w)not statednot determined
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
[D-Aib13]-diastereomer15 / 150.220.05–0.39
trifluoroacetyl adduct (+96 Da)15 / 150.070.01–0.13
C20 diacid mono-amide15 / 150.040.01–0.36
tirzepatide dimer15 / 150.030.02–0.06
Met(O) sulfoxide (+16 Da)8 / 151.170.84–1.52
des-Aib2 analogue8 / 150.790.57–1.03
truncated (3-39)7 / 150.790.49–0.94
des-Gly deletion (−57 Da)7 / 150.790.48–0.93
Section 7

What this rollup does not establish