Talk:Hydrazine

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Lack of information
This article appears to be missing a lot of relevant information.

In many wiki pages referencing hydrazine and in other material on the internet, it is always mentioned how highly toxic this substance is both to humans and the environment in general. Yet this article has almost no information on this, there is a brief list of symptoms of hydrazine poisoning but no explanation of how and why this is such a toxic substance. What does it actually do when it is inside the body? How does this interact with non-human life such as plants, and what impact does it have on things like the water table?

Furthermore, there is a lack of information surrounding hydrazines use as a fuel additive in the earlier days of dragcar racing. I originally came to this page wanting to find out about this exceedingly unwise use of the chemical and the health risks associated with it after reading dozens of anecdotes about people mixing it with fuel.

This article is exceedingly narrow in scope and needs serious work. Taurich (talk) 03:09, 1 June 2016 (UTC)
 * Drag racing is probably not viewed as a major app, in terms of the amounts used. That attitude might explain the paucity of info on that issue.  Re your comment about the basis of its health effects: apparently not much is known about what hydrazine does in terms of molecular mechanisms.  Furthermore, according to an aviation health report, few problems have been reported (thus not much of an incentive to figure out how it kills).  Perhaps because people treat this stuff so carefully, and the anhydrous material is not readily available.  My two cents.--Smokefoot (talk) 01:46, 3 January 2018 (UTC)

Assessment comment
Substituted at 18:34, 29 April 2016 (UTC)

acidity
the pka value in the table is on the right is wrong, its in fact the pka of the hydrazinium ion. i wouldve corrected it but couldnt find hydrazines pka anywhere. if anyone can find it, please add it. — Preceding unsigned comment added by 84.62.113.172 (talk) 15:02, 30 June 2016 (UTC)

Hydrazine sulfate
Reacting hydrazine with sulfuric acid will form the salt called hydrazine sulfate.
 * H2SO4 + N2H4 → HSO4- + N2H5+

Hydrazine sulfate is often used as a substitute for real hydrazine. The hydrazine sulfate is reacted with a base to reform hydrazine which can be used for reductions, azotizations, and other uses in chemistry. Ericeleven (talk) 00:33, 24 March 2018 (UTC)

Probably add a list of known Hydrazine salts
We should add a list of known hydrazine salts so that people can read up on certain hydrazine salts if they want to. Ericeleven (talk) 17:13, 24 March 2018 (UTC)

This should be mentioned
I don't see why this is not even mentioned here: 1,2-dimethylhydrazine, aka symmetrical dimethylhydrazine. The only two pieces of info that I have been able to rummage up about this compound are that a). It is difficult to manufacture, and b). It does exist.47.215.180.7 (talk) 05:08, 9 April 2018 (UTC)

Occupational Hazards Update
A few sub-sections of the previous edits were deleted and I would like to add the material in a manner consistent with the page design and wiki rules.

I believe the "health hazards" section was removed accidentally as this information was not directly referenced in the feedback. It is simply a paragraph explaining the common symptoms related to hydrazine exposure (along with sources) that are well-documented in the literature. Some of this information already existed before the edit but was incomplete, which is why I added a few more signs/symptoms.

The "treatment" subsection was removed with feedback that wiki does not provide advice. I cited the source of the information (CDC) and used words like "it is recommended" which was meant to refer back to the source, but I can understand that wiki would like to avoid the appearance of medical recommendations. Regardless, I will rewrite the paragraph to say "CDC recommends", etc. The content actually does not discuss detailed medical treatment and more focuses on overall response (remove contaminated clothing, wash skin, etc).

The "occupational uses" subsection was removed as it was redundant with uses described in the opening paragraph. I will remove the uses already cited and add the remaining information to the opening paragraph in order to better organize content. I would still like to include the Air Force specific use in aircraft, which may require a separate section as it does not seem appropriate in the introductory paragraph.

Thank you for the feedback and please advise issues.

Wikiworkenviro (talk) 15:47, 27 November 2018 (UTC)

Relation to Hydrazine (antidepressant)
I am not seeing the antidepressants in the Applications section for this page, but Hydrazine (antidepressant) is categorised with Category:Hydrazines. Is there a relation between these two?

pKb
The Kb and pKb values listed in the body text don't match. I'm not sure which value is correct, but the relationship between the two is pKb = -log(Kb) and that's not true for the two numbers listed Science Is My Life (talk) 10:16, 20 July 2021 (UTC)
 * pKa + pKb = 14 = 8.10 + 5.90.--Smokefoot (talk) 13:04, 20 July 2021 (UTC)

What other stuff is hydrazine soluble in?
Looking at the page for ammonia, I'm getting the impression that hydrazine dissolves well in alcohols, chloroform, and ethers. Does it dissolve in hydrocarbons as well, or does it react with them? DASL51984 (Speak to me!) 06:48, 19 January 2022 (UTC)

Voyager 1 & 2
Voyager 1 & Voyager 2 spacecraft each has 16 hydrazine-based thrusters. • Sbmeirow  •  Talk  • 19:24, 17 July 2023 (UTC)

Use in LSD production
I was wondering if the fact that Hydrazine is a precursor to the manufacture of LSD is relevant here. Especially considering its cultural relevance: it was a key part of the famous drug bust "project Julie", as a wrapper containing the words "hydrazine hydrate" found in the car of one of the main chemists triggered the operation (see linked source). Ranamarathon (talk) 21:41, 4 September 2023 (UTC)

Hypergolic properties of hydrazine
Various hydrazines (eg, methyl hydrazine, dimethyl hydrazine) are hyperbolic with strong oxidants. Nitrogen tetroxide and hydrazine is a hypergolic mixture used in NASA spacecraft in the 1960s and 1970s. Someone more knoweledgable than me on this should include this.

Possibly it might be enough to simply state that it is *hypergolic* with *nitrogen tetroxide* and link to those two. Dunno. Physical chemistry and how it's handled in Wikipedia is beyond my brain cell these days. 2001:8003:E40F:9601:645D:C915:B2CA:4B75 (talk) 23:06, 7 December 2023 (UTC)


 * I believe this is already covered under Hydrazine, unless I'm missing a specific definition you're looking for. Reconrabbit (talk) 16:44, 8 December 2023 (UTC)