 Compared to TAED, which is the predominant bleach activator used in Europe, NOBS is efficient at much lower temperatures.At 20 °C NOBS is 100 times more soluble than TAED in water.When attacked by the perhydroxyl anion (from hydrogen peroxide), NOBS forms the peroxy acid peroxynonanoic acid and releases the leaving group sodium 4-hydroxybenzene sulfonate, which is an inert by-product.