coa_reader

The supplier's own declaration is printed beside the index's balance on this page. Comparing the two is the point of publishing both and rule AX-R07 is about the comparison.

What would resolve this quickly is the batch record rather than the summary certificate — the in-process chromatogram, the fraction cut, and the reporting threshold applied. Every supplier scorecarded here holds one.

Read the related-substances table rather than the headline. Where the table is itemised with retention times, the headline is a summary of it and the summary's precision is irrelevant.

The certificate that arrives with a retail order is the certificate an ordinary buyer gets. Assessing it is assessing the real documentation practice rather than the sample-request one.

The certificate field that would settle this in one line is the content basis. Anhydrous and salt-free, as-is, or gross: three different numbers and one field.

A closed balance is what converts a purity figure into a mass. 86.49 %w/w target content on a 5 mg claim gives 4.62 mg recovered, and every step of that is on the record.

What resolves this in one email is the batch record rather than the summary sheet: the integration report at full precision, with the reporting threshold stated. It is routinely available.

Certificates that omit endotoxin are the majority. The documentation rubric on this site weights it at fifteen points precisely because its absence cannot be compensated by anything else on the page.

The index publishes both figures and the arithmetic between them. It does not characterise the difference beyond stating its size, and the rule page sets out what the size does and does not support.

A closed balance is what converts a purity figure into a mass. 88.07 %w/w target content on a 0.1 mg claim gives 0.10 mg recovered, and every step of that is on the record.

Where a supplier declaration closes as well as the index's does, the two documents can be reconciled field by field. That is the strongest documentation outcome available.

Provenance and documentation are independent axes. A supplier-selected sample with a complete lot-specific certificate is stronger evidence than an independently purchased one with no paperwork at all.