AssayIndex

An open index of third-party analytical results for research peptides

Open AssayIndex collects assay reports submitted by buyers and laboratories, normalises them into one schema, and publishes each one as a record with its method, its provenance and its limitations attached. Rollups by batch, compound, supplier, lab and quarter are computed from those records and nothing else. The whole dataset is downloadable as CSV and JSON.

assay reports6,584
batches1,154
compounds66
suppliers28
laboratories6
median purity99.08
median recovery97.8
flagged1,753
Read this first

The two numbers that matter, and the one that does not

The index is blunt about this because the alternative is a reader drawing a conclusion the data cannot support.

Median purity across the index 99.08% n=6576
Median recovery against label claim 97.8% n=3813
10th percentile recovery 90.3% n=3813
029759489192.093.094.095.096.097.098.099.0100.092.00–92.25 %: n=092.25–92.50 %: n=092.50–92.75 %: n=092.75–93.00 %: n=093.00–93.25 %: n=093.25–93.50 %: n=093.50–93.75 %: n=093.75–94.00 %: n=094.00–94.25 %: n=094.25–94.50 %: n=094.50–94.75 %: n=094.75–95.00 %: n=095.00–95.25 %: n=095.25–95.50 %: n=095.50–95.75 %: n=195.75–96.00 %: n=396.00–96.25 %: n=496.25–96.50 %: n=796.50–96.75 %: n=1396.75–97.00 %: n=2897.00–97.25 %: n=5597.25–97.50 %: n=8897.50–97.75 %: n=17297.75–98.00 %: n=29998.00–98.25 %: n=41098.25–98.50 %: n=55098.50–98.75 %: n=63898.75–99.00 %: n=72099.00–99.25 %: n=84599.25–99.50 %: n=86699.50–99.75 %: n=81799.75–100.00 %: n=1060median 99.08 Purity (% area) Reports
Figure 1. Every purity figure in the index, 6,576 records. Compressed at the top, long left tail — which is why this site reports medians and interquartile ranges rather than means and standard deviations, and why the interesting question is the shape of that tail rather than the position of the peak.
Rollup

Suppliers

Ordered by index coverage, which is a property of this dataset and not a claim about the suppliers. The comparison page has thirteen columns and a confidence flag on each row.

SupplierReportsMedian %IQR ppRecovery %DocTrend
Homopeptide45799.320.8597.085
TFC41799.190.8498.284
WWB39899.370.6298.992
GGPeps37198.760.9197.777
QSC35099.510.8197.490
WXT30198.511.0897.569
HJ24799.090.9996.083
HYB24199.370.8998.089
QYB23699.540.6397.391
JEEP23099.370.7098.288
MKM22998.900.9298.178
CPC22798.490.8097.568
KP22398.510.9497.974
SGN22198.580.8697.072
SSA21998.240.8198.472
PPG21399.450.7297.393
BCH20998.321.1197.767
ERP20599.030.7296.280
SWB20498.950.9897.780
AMB20399.430.7598.093
FGP20099.620.6197.990
ASY19099.590.8298.796
TFS18899.240.8998.795
GSP18099.021.0096.991
SinoPep16298.831.0097.993
SIG16098.570.8698.691
GL Biochem8398.810.5397.771
QST2098.170.4397.865
Rollup

Most-covered compounds

TB-500

reports268
median %99.53

Semax

reports216
median %99.46

GHRP-6

reports206
median %99.54

All 66 catalogued compounds →

Core records

Most recent records

The 12 most recently submitted records. Every record →
ReportCompoundSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-043179Kisspeptin-10GL BiochemGLBI-2608-N7715Medutest2026-Q398.974.37—Buyer-sourced1MARGINAL
AX-2026-041776TB-500ASYASY-{CAT}-2167Janoshik2026-Q399.924.6198.2Buyer-sourced0PASS
AX-2026-042265Humanin (HNG)TFCTFC-2605-U1300PeptideMeter2026-Q399.526.31—Buyer-sourced0PASS
AX-2026-043535GHRP-2SIGSIG-2603-6031Janoshik2026-Q399.121.26105.7Buyer-sourced0PASS
AX-2026-043376SemaglutideWXTWXT-2604-C3248Janoshik2026-Q397.084.22—Buyer-sourced1MARGINAL
AX-2026-042437RetatrutideHomopeptideHOMO-2605-V4718Nordanalyt2026-Q398.683.67102.8Buyer-sourced0PASS
AX-2026-042222SS-31 (Elamipretide)TFCTFC-2607-R9099VendorInvestigate2026-Q399.465.41102.6Buyer-sourced0PASS
AX-2026-041831SurvodutideGSPGSP-2603-E3156Kestrel2026-Q399.915.5093.2Buyer-sourced0PASS
AX-2026-041275LiraglutideWWBWWB-2607-X2189Nordanalyt2026-Q399.334.39—Buyer-sourced1MARGINAL
AX-2026-043429L-Glutathione (reduced)WXTWXT-2605-B3833Nordanalyt2026-Q398.486.5896.9Supplier-supplied1FAIL
AX-2026-043095RetatrutideKPKP-2607-H5774Janoshik2026-Q395.815.48105.2Buyer-sourced0FAIL
AX-2026-042424SemaglutideHomopeptideHOMO-2604-X3806PeptideMeter2026-Q398.854.8792.0Buyer-sourced0PASS
Rollup

Detection

12 published rules, each with its literal predicate. A flag is not a finding of fault — several of these rules fire most often on records that are entirely fine, and each rule page says so.

RuleFlaggedRate
AX-R04 — Digit preference in declared purity4677.09%
AX-R06 — Recovered mass outside label claim tolerance3094.69%
AX-R09 — Impurity fingerprint shared across suppliers2523.83%
AX-R01 — Mass accuracy outside class limit2463.74%
AX-R11 — Retention time outside compound window2073.14%
AX-R02 — Declared impurity arithmetic does not close2043.10%

All 12 rules →