Hydrazinium nitroformate

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| ImageFile = Hydrazinium nitroformate.svg

| ImageSize = 200px

| IUPACName =

| OtherNames = Hydrazine nitroform; HNF

| Section1 = {{Chembox Identifiers

| CASNo = 14913-74-7

| CASNo2 = 20773-28-8 ?

| EINECS = 414-850-9

| PubChem = 129868016

| StdInChI=1S/CN3O6.H4N2/c5-2(6)1(3(7)8)4(9)10;1-2/h;1-2H2/q-1;/p+1

| StdInChIKey = DTXWOSBMROEDNN-UHFFFAOYSA-O

| SMILES = N[NH3+].[O-][N+](=O)[C-]([N+]([O-])=O)[N+]([O-])=O

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| Section2 = {{Chembox Properties

| C=1 | H = 5 | N=5 | O=6

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| Section3 = {{Chembox Hazards

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Hydrazinium nitroformate (HNF) is a salt of hydrazine and nitroform (trinitromethane).{{cite journal | author = H. F. R. Schoyer, W. H. M. Welland-Veltman, J. Louwers, P. A. O. G. Korting, A. E. D. M. van der Heijden, H. L. J. Keizers, and R. P. van den Berg | title = Overview of the Development of Hydrazinium Nitroformate | journal = Journal of Propulsion and Power | volume = 18 | issue = 1 | date = 2002 | pages = 131–137 | doi = 10.2514/2.5908 }}{{cite journal | author = P. S. Dendage, D. B. Sarwade, S. N. Asthana & H. Singh | date = 2001 | title = Hydrazinium nitroformate (HNF) and HNF based propellants: A review | journal = Journal of Energetic Materials | volume = 19 | issue = 1 | pages = 41–78 | doi = 10.1080/07370650108219392 | bibcode = 2001JEnM...19...41D | s2cid = 98538776 }} It has the molecular formula {{nowrap|[H₂NNH₃]⁺[C(NO₂)₃]⁻}}{{Cite journal | title = Crystal structure of hydrazine nitroform [N₂H₅⁺C(NO₂)₃⁻] | author = Dickens, Brian | journal = Chemical Communications | issue = 5 | pages = 246–247 | date = 1967 | doi = 10.1039/c19670000246 }} and is soluble in most solvents.

Hydrazinium nitroformate is an energetic oxidizer. Research is being conducted at the European Space Agency to investigate its use in solid rocket propellants.{{cite magazine |publisher= European Space Agency |title= Preparing for the Future |volume= 6 |issue= 1 |date= March 1996}}{{cite book |first=Walter |last= Tydon |title= Minimum Cost Design Launch Vehicle Design/Costing Study TOR-0059(6526-01)2 |volume= 2, Background Studies |publisher= The Aerospace Corporation |date= 31 July 1970 |pages= 4-13, 4-14 }} It tends to produce propellants which burn very rapidly and with very high combustion efficiency. Its high energy leads to high specific impulse propellants. It is currently an expensive research chemical available only in limited quantities. A disadvantage of HNF is its limited thermal stability.