Talk:Sodium dithionite

Untitled
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)

Toxicity
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. 70.232.28.207 00:08, 14 October 2007 (UTC)

This compound can generate Sulfur Dioxide which is toxic to the respiratory tract, eyes. Sodium Bisulfite is used to preserve foods, e.g. fresh salads. Unfortunately some humans and animals get an extreme (allergic?) reaction with NaHSO3. Shjacks45 (talk) 22:35, 22 February 2020 (UTC)

Redox potential
The reduction potential, E°&prime;, of &minus;0.66 V is for the redox couple [SO2]&minus;/[HSO3]&minus;. The cited [http://dx.doi.org/10.1111/j.1432-1033.1978.00535.pp.x Eur. J. Chem. article] notes that above 10 nM, the [SO2]&minus; species exists as a dimer, i.e., [S2O4]2&minus;, and that the midpoint potential increases with increasing dithionite concentration: ΔEm/Δlog([S2O42&minus;]) = 29 mV. At typical dithionite concentrations of 1 mM, the reversible potential is &minus;0.473 V. Grunkhead 10:00, 3 March 2009 (UTC)

The acid redox potential is nice, but often (e.g.dye bleaching) its used in an alkaline environment, so electrode potential would be higher (acid produced on reduction). Laundry bleach packets contain sodium carbonate. Shjacks45 (talk) 22:28, 22 February 2020 (UTC)

Reference
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? 90.192.184.78 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 71.237.37.202 (talk) 05:05, 13 July 2010 (UTC)

CRC Handbook
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 74.253.18.196 (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
"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
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: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1200118/pdf/biochemj00841-0126.pdf http://www.sciencedirect.com/science/article/pii/S0009250996004976 as just two examples of many — Preceding unsigned comment added by 68.236.121.54 (talk) 18:07, 19 April 2012 (UTC)

Rongalite
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)