Talk:Sodium dithionite

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Also adding reducing potential would be nice134.53.50.60 16:49, 15 January 2007 (UTC) Never mind maybe I should read Jasoninkid 16:55, 15 January 2007 (UTC)


The first sentence says it is toxic, but the article later makes reference to the compounds' low toxicity at 5gm/kg, which seems pretty nontoxic to me - means an adult of 50kg would need to consume 250 grams or a half pound of the pure compound. Unlikely to ever occur, so I removed the initial toxic mention. 00:08, 14 October 2007 (UTC)

Redox potential[edit]

The reduction potential, E°′, of −0.66 V is for the redox couple [SO2]/[HSO3]. The cited Eur. J. Chem. article notes that above 10 nM, the [SO2] species exists as a dimer, i.e., [S2O4]2−, and that the midpoint potential increases with increasing dithionite concentration: ΔEm/Δlog([S2O42−]) = 29 mV. At typical dithionite concentrations of 1 mM, the reversible potential is −0.473 V. Grunkhead 10:00, 3 March 2009 (UTC)


Not my kind of thing, but if anyone wants to expand it, this link says much more about its properties, synonyms and uses. Tearlach 16:50, 16 August 2005 (UTC)

This stuff is in Dylon's Fabric Colour Stripper as a domestic pre-dye. You dissolve it (300g) in 2 litres of warm water and add it to a 95 deg C wash. The instructions say "may not remove some colours such as bright greens, bright blues and indigo". I'm not sure why - the chemistry of these things is fun, isn't it? 14:07, 10 July 2007 (UTC)

Also used in "Rit" laundry White-Wash treatment. Combined with Sodium Carbonate (Anhydrous). Says "Do not combine with any bleach product" —Preceding unsigned comment added by (talk) 05:05, 13 July 2010 (UTC)

CRC Handbook[edit]

According to the 86th edition of the CRC Handbook, this compound's name is sodium dithionate. However, I will admit that according to every MSDS I can find online, it is referred to as sodium dithionite. Either way, this discrepancy should be cleared up. —Preceding unsigned comment added by (talk) 03:08, 27 March 2009 (UTC)

The CRC Handbook is wrong, if so. Na2S2O4 is sodium dithionite, or sometimes sodium "hydrosulfite". The dithionAte is a different compound, Na2S2O6. Thortveitite (talk) 12:36, 22 February 2010 (UTC)

Biological Section[edit]

"When you heat the reaction, rainbow colors emerge due to the high transition states of energy." I presume this is trying to say something, but it needs translating into much more correct and unambiguous scientific English. Thortveitite (talk) 12:39, 22 February 2010 (UTC)

deoxygenation esp for hemoglobin work[edit]

as a biologists, I had always heard of NaDithionite as a way to remove oxygen from solutions; this is widely used by people who study hemoglobin. refs: as just two examples of many — Preceding unsigned comment added by (talk) 18:07, 19 April 2012 (UTC)


Rongalite probably merits inclusion in this article. It has a commercial name (BASF) and its chemistry is very complicated, but it is widely used based on Ullmann's Encyclopedia. --Smokefoot (talk) 22:55, 28 February 2015 (UTC)