1-stearoyl-2-linoleoyl-sn-glycero-3-phosphoethanolamine is a 1-(alk-1-enyl)-2-acyl-sn-glycero-3-phosphoethanolamine in which the alkenyl and acyl groups are specified asas (1Z)-octadecenyl and linoleoyl respectively. It is used in the preparation of monolayers.