2-chloroStearicacid is a bioactive fatty acid that accumulates in primary human monocytes and neutrophils as well as murine neutrophils stimulated with phorbol 12-myristate 13-acetate . It induces DNA release from primary human neutrophils. 2-chloroStearicacid is toxic to C. quinquefasciatus larvae (LC50 = <1 ppm).