Observed arrival · 2026-08-30
Open AssayIndex, Where Peptide Purity Gets a Reality Check
An open, downloadable index of third-party analytical results for research peptides, organised by batch, compound, supplier, laboratory, method, and anomaly.
Field notes
The index normalises buyer- and laboratory-submitted assay reports into records that retain method, provenance, and stated limitations, then calculates views by batch, compound, supplier, laboratory, and quarter. Its dataset spans 6,584 reports across 1,154 batches, 66 compounds, 28 suppliers, and 6 laboratories. A central methodological distinction is between purity and recovered mass: the site reports a 97.8% median recovery against label claim, but that measure appears in only 3,813 records.
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