AssayIndex

QSC-2604-H9231

Semaglutide · 5 mg declared · Qingdao Sigma Chemical Co., Ltd. · manufactured 04 Apr 2026

CHARACTERISED
Lot code
QSC-2604-H9231
Supplier
QSC — Qingdao Sigma Chemical Co., Ltd.
Compound
Semaglutide
Compound class
Incretin analogues and co-agonists
Declared label claim
5mg
Manufacture date
04 Apr 2026
Index quarter
2026-Q2
Independent assays
5
Laboratories involved
PeptideMeter, Janoshik
Provenance mix
Supplier-supplied ×5
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 5
Median purity 99.32% n=5
Spread (max − min) 0.97pp n=5
Standard deviation 0.350pp n=5
96.196.897.598.298.899.5100.2This lot (QSC-2604-H9231)This lot (QSC-2604-H9231): Q1 99.23, median 99.32, Q3 99.42, n=5outlier 98.79outlier 99.76n=5All SemaglutideAll Semaglutide: Q1 98.24, median 98.87, Q3 99.33, n=926outlier 96.37n=926 Purity (% area)
Figure 1. This lot's independent purity results against the whole Semaglutide 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 5

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-2026-041697QSC-2604-H9231PeptideMeter2026-Q299.766.75106.7Supplier-supplied0PASS
AX-2026-041698QSC-2604-H9231PeptideMeter2026-Q299.326.09—Supplier-supplied1MARGINAL
AX-2026-041699QSC-2604-H9231Janoshik2026-Q299.236.3298.7Supplier-supplied1MARGINAL
AX-2026-041700QSC-2604-H9231Janoshik2026-Q298.796.57103.1Supplier-supplied2FAIL
AX-2026-041701QSC-2604-H9231Janoshik2026-Q299.426.35—Supplier-supplied1MARGINAL
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
PeptideMeter299.76, 99.3299.5428min-0.0599.59
Janoshik399.23, 98.79, 99.4299.2330min+0.0099.23

This lot contributes 1 paired comparison 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)99.7999.76divergence +0.47 pp vs batch median
Total impurities (% area)0.210.24
Largest single impurity (% area)0.080.12
Water (%)4.96.75
Counter-ion (%)7.29.42
Peptide content (%w/w)87.383.42
Endotoxin (EU/mg)not stated1.78
Method stated on certificateYES—column, 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
deamidated (Asn→Asp, +1 Da)5 / 50.070.02–0.19
[D-Aib8]-diastereomer4 / 50.110.03–0.17
C18 diacid mono-ester3 / 50.320.12–0.43
des-His1 truncate (−137 Da)3 / 50.060.05–0.09
des-AEEA semaglutide (−145 Da)2 / 50.660.45–0.86
Met(O) sulfoxide (+16 Da)2 / 50.070.03–0.10
semaglutide dimer2 / 50.010.01–0.02
tBu-protected residual (+56 Da)2 / 50.030.02–0.03
Section 7

What this rollup does not establish