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Unified Supply Chain Assay Web

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Recommended assay

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  • Last UpdatedAug 14, 2026
  • 1 minute read

The first assay shown is always the recommended assay. There can be a maximum of one recommended assay for a traded crude, and an assay will always be recommended. If no assay for a traded crude is flagged as recommended in the database, Assay displays the most recent assay (as determined by issue date) as the recommended assay.

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