Rexar – Chemical Reference Materials & Laboratory Supplies Rexar is a European supplier of laboratory supplies, analytical chemicals and chemical reference materials for professional and technical use. Our catalogue includes a broad range of laboratory consumables, analytical reagents and reference-grade substances supplied for use in controlled laboratory and research environments. These materials support identification, comparison and general analytical workflows. All products are supplied in accordance with standard laboratory handling practices and are intended for professional use only. Rexar has been supplying laboratory materials to research and technical professionals since 2009, with reliable distribution throughout the Netherlands and Europe.