Celanese VAM HQ 6-8 ECO-B

Bio-Attributed Carbon

A bio-attributed purchase becomes a number in someone else books. This section covers how that number is built, which documents support it and where the limits of the claim sit.

When a plant buys bio-attributed monomer, the material enters its own product and the attribute enters its reporting; the two are tracked separately. The plant records the attributed quantity against the lot and uses it when a customer asks about the bio-based share of a finished product. What it cannot do is treat that volume as though the drum in the store were physically different from a conventional drum, because it is not.

Accounting discipline matters more than terminology. Attributed volumes are finite: one unit of certified input supports one unit of claim, so a plant that over-allocates across two product lines has created a problem it will meet during an audit. The safe practice is a simple ledger, one line per lot, showing quantity received, quantity consumed and quantity still claimable, reconciled before any statement is issued.