Talk:Iron(II) sulfate

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What are the side effects[edit]

if contact with the eye server itches and pains, Precautions are, wash out with water, seek for medicle attension

Molecular weight[edit]

The molecular weight will differ depending on which hydrate is used. (mass of the water must be factored in). I'm too lazy to add/look them all up... -- 19:29, 11 July 2006 (UTC)


I just opened up a bottle of the heptahydrate in the lab and noticed a distinct Maple syrup odor. Whoever maintains this article should add this detail somewhere.Beakerboy 18:38, 19 April 2007 (UTC)

This won't be from the iron(II) sulfate itself, it must be some sort of impurity. The iron(II) sulfate should be pretty much odorless. Walkerma 21:14, 19 April 2007 (UTC)

Further heating[edit]

The article mentions that heating solid iron (II) sulfate gives water. Further heating produces a condensate of quite pure sulfuric acid. Is this worthy of mention? Not least as a potential hazard for anyone contemplating actually heating the solid. Dajwilkinson 23:37, 3 June 2007 (UTC)

The point is well taken, but many compounds when subjected to high temperatures release dangerously reactive substances. IMHO, WE-chem would need to dedicate inordinate space to describe every possible precaution against every possible way of treating a given chemical.--Smokefoot 03:44, 4 June 2007 (UTC)
Couldn't you simply add the decomposition temperature in the table of information shown at right? Many, if not most chemicals on WP list their melting, boiling and decomposition temperatures. This one doesn't, but I don't think adding one more line to the table constitutes dedicating inordinate space, as you put it. Plus, it's good info to know - most importantly for those interested in completeness, those interested in safety, and those who might want to decompose the substance. For the record, it decomposes at 300 °C 06:40, 8 August 2007 (UTC)


Was it really used as an oxidizer with indigo dye? That sounds like ferrIC sulfate. Admittedly, some Fe(III) may be present, but then, that isn't Fe(II) sulfate either. 03:25, 12 June 2007 (UTC)

Good point. The same error occurred in the indigo dye article. Although I haven't used FeSO4, I run a lab every year with indigo, and it's clear from that and the indigo dye article that the author meant "reduced" not oxidized. You have to reduce indigo to a soluble form in a bath to get it onto the fabric, and that's the harder part (that required urine in the old days - you can guess why they developed this process!). The oxidation of leuco-indigo back to indigo happens in air in a minute or two. So I've rewritten it as something much more plausible, but I'd still like to see a ref for this. Thanks, Walkerma 04:47, 12 June 2007 (UTC)

Minor cleanup[edit]

Just did a few minor edits on this article. Cleaned up a few poorly-formed sentences and added some missing punctuation. 01:45, 21 August 2007 (UTC)

Nice work, thanks. Walkerma 03:27, 21 August 2007 (UTC)


In the article it mentions that iron(II) sulfate is a reducing agent and then says "For example, it reduces nitric acid to nitrogen oxide and chlorine." Now, call me crazy, but the last I checked there is no chlorine present in either reactants, so where the heck does chlorine come from? I think it should read nitrogen oxide and water. Maybe chlorine is released if you are using iron(II) chloride, but this is an article about the sulfate... (talk) 00:25, 13 October 2008 (UTC)

Diagrams and chemical formulae do not match[edit]

I understand that this compound occurs as a hydrate, but since the data box chemical formula is FeSO4, perhaps the images should match this formula?

Very good questions that I am going to take to the main Chemicals Talk page. --Smokefoot (talk) 12:25, 4 February 2017 (UTC)
IMHO, the hydrates should be added to the chemical formula in the infobox (like its done for CuSO4. Christian75 (talk) 20:39, 4 February 2017 (UTC)

Wrong rozenite photo[edit]

The photo of "rozenite" does not show rozenite, but roSeLite - a completely different mineral; roselite is pink/rose, while rozenite is ALWAYS WHITE. This is an evident error. Please correct it. Eudialytos (talk) 15:34, 17 June 2017 (UTC)

Removed. Vsmith (talk) 16:59, 17 June 2017 (UTC)


There is no such thing as "pyrites". Pyrite is a SINGLE, very well defined mineral species. Please correct it. Eudialytos (talk) 15:36, 17 June 2017 (UTC)

Fixed. Vsmith (talk) 16:59, 17 June 2017 (UTC)
Its a common term for rockhounds and old timers. --Smokefoot (talk) 18:09, 17 June 2017 (UTC)
Thanks. I could do this by myself, but I've been strongly discouraged by a single user related to mineralogy, which made me quit editing. Eudialytos (talk) 12:12, 18 June 2017 (UTC)