 New environmental regulations have prompted changes in the manufacturing of composites for printed wiring boards, leading to alternate processing methods and affecting the properties of additives used for flame retardancy. This review examines recent advancements and phosphorous-containing flame retardants for electrical and electronic applications and compares them with commercial options. The degradation mechanism and flame retardancy of these phosphorous-flame retardants and epoxy-resins will also be discussed. This article was authored by Manfred Doring, Muriel Rakudomalala, and Sebastian Wagner.