Liquefied Butanes

Liquefied butanes—used as LPG blending components, petrochemical feedstocks, and aerosol propellants—are classified by purity under this heading, with lines for 90–95% liquid-volume purity (2711130010) and other grades (2711130020). The distinction between normal butane and isobutane is commercially significant for refinery alkylation and petrochemical applications, though both fall within this heading. Canada is the leading supplier, followed by South Korea and Equatorial Guinea, with the United Kingdom and China also among the top sources.