Sodium 2-anthraquinonesulfonate

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Sodium 2-anthraquinonesulfonate
Sodium 2-anthraquinonesulfonate.png
IUPAC name
Sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate
Other names
Sodium 2-anthrachinonesulphonate; 2-Anthraquinone sodium sulfonate; Silver salt
3D model (Jmol)
ECHA InfoCard 100.004.555
Molar mass 310.25 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 2-anthraquinonesulfonate (AMS) is a water-soluble anthraquinone derivative. In the laboratory it could be prepared by sulfonation of anthraquinone.[1]

Digester additive in papermaking[edit]

AMS is used as a catalyst in production of alkaline pulping in the soda process. It goes through a redox cycle similar to that of anthraquinone to give a catalytic effect. AMS was discovered as an efficient pulping catalyst before anthraquinone,[2] but has a higher cost.


  1. ^ "Synthesis of sodium anthraquinone-2-sulfonate". - Preparative chemistry procedures. Retrieved 2016-01-11. 
  2. ^ "Anthraquinone/ alkali pulping. A literature review" (PDF). July 1978.