Sodium 2-anthraquinonesulfonate

Sodium 2-anthraquinonesulfonate

Names
IUPAC name Sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate
Other names Sodium 2-anthrachinonesulphonate; 2-Anthraquinone sodium sulfonate; Silver salt
Identifiers
CAS Number	131-08-8
3D model (Jmol)	Interactive image
ECHA InfoCard	100.004.555
PubChem	8551
SMILES O=C1C2=C(C=CC(S(=O)([O-])=O)=C2)C(C3=CC=CC=C31)=O.[Na+]
Properties
Chemical formula	C14H7NaO5S
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

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.

References

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