e/Dithionite

Information
has gloss	eng: The dithionite anion, S2O, is an oxoanion of sulfur formally derived from the hypothetical compound dithionous acid, H2S2O4. Dithionous acid has not been detected either as a pure compound or in solution. It's IUPAC name is sulfinatosulfinate, the name of its corresponding acid is sulfinosulfinic acid.
lexicalization	eng: dithionite
instance of	(noun) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver reducing agent, reductant, reducer

Meaning
Italian
has gloss	ita: Lo ione ditionito o idrosolfito è uno ione poliatomico di formula S2O42− con massa molecolare di 128,13 uma.
lexicalization	ita: ditionito

Media
media:img	Dithionite-ion-2D-dimensions.png
media:img	Dithionite-ion-3D-balls.png