Trithionate

Trithionate is an oxyanion of sulfur with the chemical formula S
₃O²⁻
₆. It is the conjugate base of trithionic acid.^[1] Dilute sodium hydroxide hydrolyzes S
₄N
₄ as follows, yielding sodium thiosulfate and sodium trithionate:

2 S
₄N
₄ + 6 NaOH + 9 H
₂O → Na
₂S
₂O
₃ + 2 Na
₂S
₃O
₆ + 8 NH
₃

Trithionate

Names
IUPAC name 2,2,4,4-tetraoxido-1,5-dioxy-2,3,4-trisulfy-[5]catenate(2−)
Identifiers
CAS Number	15579-17-6
3D model (JSmol)	Interactive image
3DMet	B01514
ChEBI	CHEBI:15987
ChemSpider	477
Gmelin Reference	142337
KEGG	C01861
PubChem CID	491
CompTox Dashboard (EPA)	DTXSID20165968
InChI InChI=1S/H2O6S3/c1-8(2,3)7-9(4,5)6/h(H,1,2,3)(H,4,5,6)/p-2 Key: KRURGYOKPVLRHQ-UHFFFAOYSA-L
SMILES [O-][S+2]([O-])([O-])S[S+2]([O-])([O-])[O-]
Properties
Chemical formula	O6S3−2
Molar mass	192.18 g·mol−1
Conjugate acid	Trithionic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Certain sulfate-reducing bacteria have been known to use the compound in respiration.^[2]

References

1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
2. Oltmann, L. F.; Stouthamer, A. H. (1975-10-27). "Reduction of tetrathionate, trithionate and thiosulphate, and oxidation of sulphide in proteus mirabilis". Archives of Microbiology. 105 (2): 135–142. Bibcode:1975ArMic.105..135O. doi:10.1007/BF00447128. ISSN 0302-8933. PMID 1106343. S2CID 1615795.