What reactions involving hydrazine, dinitrogen tetroxide and possibly a contaminant can produce a salt?

Hydrazine $\ce{N2H4}$ and dinitrogen tetroxide $\ce{N2O4}$ form a hypergolic fuel and oxidizer pair widely used in spacecraft including [Akatsuki](https://en.wikipedia.org/wiki/Akatsuki_(spacecraft)) (あかつき, 暁, "Dawn") also known as the Venus Climate Orbiter (VCO) and Planet-C.


Wikipedia [states](https://en.wikipedia.org/wiki/Hydrazine#Hydrazinium_salts):



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> Hydrazine can be monoprotonated to form various solid salts of the hydrazinium cation ($\ce{N2H5+}$) by treatment with mineral acids. A common salt is hydrazinium sulfate, $\ce{[N2H5]HSO4}$, also called hydrazine sulfate. Hydrazine sulfate was investigated as a treatment of cancer-induced cachexia, but proved ineffective.
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> Double protonation gives the hydrazinium dication ($\ce{H3NNH3^2+}$), of which various salts are known
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A [comment](https://space.stackexchange.com/questions/38951/how-did-salt-prevent-akatsukis-insertion-burn#comment125603_38951) below the Space SE question [How did salt prevent Akatsuki's insertion burn?](https://space.stackexchange.com/q/38951/12102) says:



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> Every article I see seems to parrot the same thing. I'm guessing this is yet another translation issue (Japanese to English) and the deposits are a hydrazine reaction product... which you could call a "salt". It's an interesting failure case that I hadn't heard of, thanks for the question.
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**Question:** Are there possible reaction products from hydrazine and dinitrogen tetroxide alone that could form an *ionic assembly of cations and anions* and considered [a salt](https://en.wikipedia.org/wiki/Salt_(chemistry)), or would this require some additional contaminant, perhaps water or some organic material to be involved?


