Sodium 2-anthraquinonesulfonate

Not to be confused with soluble anthraquinone.

Sodium 2-anthraquinonesulfonate

Names
Preferred 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 Y
3D model (JSmol)	Interactive image
ChemSpider	8080408 N
ECHA InfoCard	100.004.555
PubChem CID	9904754
UNII	511H72SDVX Y
CompTox Dashboard (EPA)	DTXSID4044535
InChI InChI=1S/C14H8O5S.Na/c15-13-9-3-1-2-4-10(9)14(16)12-7-8(20(17,18)19)5-6-11(12)13;/h1-7H,(H,17,18,19);/q;+1/p-1 N Key: GGCZERPQGJTIQP-UHFFFAOYSA-M N
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). N verify (what is YN ?) Infobox references

Sodium 2-anthraquinonesulfonate (AMS) is a water-soluble anthraquinone derivative. In the laboratory it can be prepared by sulfonation of anthraquinone.

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, but has a higher cost.