AX-R03 — Declared largest single impurity exceeds declared total

This is arithmetically impossible and there is no innocent interpretation involving the measurement. The largest single impurity is a member of the set whose sum is the total. It cannot exceed it.

Every instance the index holds resolves to one of two clerical failures. Either the two fields were transposed on the certificate template, or the "total impurities" field was populated with the largest single value and the "largest single" field with something else entirely. Both are template errors rather than data errors, and in most cases the underlying chromatogram, when requested, was fine.

The reason the index publishes the flag anyway is that a supplier whose certificate template can transpose two fields without anyone noticing is a supplier whose certificates are not being checked before release. That is a quality-system observation and it is the kind of thing an index of this sort exists to surface. Suppliers appearing here more than twice have a corresponding note on their scorecard.