Sodium nonanoyloxybenzenesulfonate

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Sodium nonanoyloxybenzenesulfonate
Sodium nonanoyloxybenzenesulfonate.png
IUPAC name
Sodium 4-nonanoyloxybenzenesulfonate
Other names
4-Sulfophenyl nonanoate sodium salt; Sodium p-nonanoyloxybenzenesulfonate; p-(Nonanoyloxy)benzenesulfonic acid sodium salt; p-Sodiosulfophenyl nonanoate
3D model (JSmol)
Abbreviations NOBS
Molar mass 336.38 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Sodium nonanoyloxybenzenesulfonate (NOBS) is an important component of laundry detergents and bleaches. It is known as a bleach activator for active oxygen sources, allowing formulas containing hydrogen peroxide releasing chemicals (specifically sodium perborate, sodium percarbonate, sodium perphosphate, sodium persulfate, and urea peroxide to effect bleaching at lower temperatures.[1] NOBS was developed by Procter & Gamble in 1983[2] and was first used in American laundry detergents in 1988.[3] NOBS is the main bleach activator used in the U.S.A. and Japan.[4] 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.[5] 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.


  1. ^ Kuzel, P.; Lieser, T. (1990). "Bleach systems". Tenside, Surfactants, Detergents. 27 (1): 23–8. 
  2. ^ Chung, S. Y.; Spadini, G. L. (1983). US4412934. 
  3. ^ Grime, J. K. (1994). "Laundry Technology Trends in the Americas". Proceedings of the 3rd World Conference on Detergents: Global Perspectives: 64–70. 
  4. ^ Hirschen, M. (2005). Handbook of Detergents Part C: Analysis. Marcel Dekker. pp. 439–470. 
  5. ^ Reinhardt, G.; Borchers, G. (2009). Handbook of Detergents, Part E: Applications. CRC Press.