CBAM is no longer a transitional regime. From January 2026 its permanent phase requires imports of cement, steel, aluminium, fertiliser, electricity and hydrogen into the EU to pay for embedded carbon, with free allocation fully withdrawn by 2034. Petrochemicals are not on that first list, but the trade impact is already here.

European buyers now open every order with one question: what is the carbon footprint of this lot. Even before base oil, rubber or polymers face a levy, procurement contracts already list product carbon footprint and ESG disclosure as front-of-contract conditions. Suppliers who cannot produce verifiable carbon data get pushed down the tender ranking.

SNSUC binds batch-level PCF to an in-browser SHA-256 fingerprint: each lot's carbon data goes on-chain and can be recomputed independently, so a buyer verifies it in a browser without waiting on a third-party auditor. When CBAM eventually pulls petrochemicals into scope, that data slots straight into the levy calculation instead of being backfilled under deadline.

For transit traders the real cost is not today's tax but tomorrow's market access. Clearing the carbon ledger now saves a two-to-three month compliance gap that would otherwise open the moment the policy lands.