As described by the HPD Open Standard, an HPD is intended to describe a product "as delivered to the job site."
The Health Product Declaration Collaborative recognizes that health and environmental impacts can occur across a product's life cycle. The choice of describing the "as delivered" product is not intended to imply any lack of interest by HPD users in the entire life cycle. However, some constraints must be applied to the HPD reporting process to allow HPDs to be feasible to complete as well as consistent and reliable.
For products in which a chemical reaction takes place during manufacturing, the HPD should report the the content ingredients based on the resulting chemicals and residuals after the chemical reaction takes place. For any practical questions on how to achieve this objective, manufacturers are invited to contact HPDC customer support.