# 4M1P

China Produces High‑Purity “Artificial‑Lung” Monomer at Pilot Scale, Easing Dependence on Imports

A Dalian University–Sinopec team has produced 4‑methyl‑1‑pentene (4M1P) at 99.3% purity in a hundred‑ton pilot run, a milestone for domestic manufacture of poly(4‑methyl‑1‑pentene) used in ECMO membranes. The result could reduce reliance on imports for a critical medical‑device input, though commercial scale‑up and regulatory steps remain.