Verifying Chemical Conversion Yield Deductions under ISO 22095 Standards
Chemical conversion yield deductions under ISO 22095 mandate subtracting process gas, char, and hydrotreating losses from input mass before awarding credits.
Inventory Credit Ledger
Meaning
Formal accounting record used to track the balance of sustainable material attributes within a mass balance system. An inventory credit ledger functions as the central repository for volume claims associated with circular or bio-based polymers. It registers every kilogram of certified input entering the supply chain and every kilogram of finished product sold with a sustainability claim.
Balance Maintenance
Credits remain valid for a specified period, typically twelve months, before they expire and must be removed from the record. The inventory credit ledger ensures that a company never sells more certified material than it has physically sourced or produced. Regular updates prevent the double counting of environmental benefits across different production sites or business units.
Audit Control
Compliance with international certification standards requires a transparent and chronological log of all transactions. Any discrepancy in the inventory credit ledger triggers a non-conformity during annual inspections, potentially resulting in the loss of certification. Accurate entries must include the certificate number of the supplier and the specific batch weight.
Allocation Methodology
Maintaining the inventory credit ledger allows a producer to assign the green attributes of a bio-based feedstock to a high-value engineering plastic even if the physical molecules are distributed elsewhere. This flexibility supports the transition to renewable feedstocks without requiring separate physical storage tanks. This administrative tool tracks the decoupling of physical flow from sustainable claims, enabling the scale-up of recycled content in complex manufacturing environments.