Dry ice's place in a carbon table cannot be inferred from the product name alone. First define the reporting boundary and the greenhouse-gas accounting method your organisation uses; do not combine purchase, production, transport and use as if they were the same item.
For each shipment, record dry ice purchased, used and, if applicable, returned in kilograms. Match the source to invoices, weigh records or stock movements; do not confuse stock change with consumption.
Ask the supplier for the emissions factor, unit, geography and period, data method and boundary. Does the factor cover production and delivery, and is CO2 released during use handled separately? If data is missing, do not invent a factor; state the gap and selected estimation method in the report.
Confirm the inventory category under your existing GHG Protocol approach and with the report verifier. Do not add purchased-product supply emissions and physical release during dry-ice use separately without checking boundaries and ownership. Distinguish CO2 mass from CO2e emissions factors; include the method and source version in the report.
