Special provision 398
ADR 2025 — special provision (SP) 398, Chapter 3.3.
This entry applies to mixtures of butylenes, 1-butylene, cis-2-butylene and trans-2-butylene. For isobutylene, see UN No. 1055. NOTE: For additional information to be added in the transport document, see 5.4.1.2.2 (e).