Hydrazoic acid
General
Systematic name	Hydrazoic acid
Other names	Azoimide, azidic acid diazoimide, hydrogen azide, hydronitric acid, triazoic acid
Molecular formula	HN3
SMILES	N=N=N
Molar mass	43.03 g/mol
Appearance	Colourless liquid
CAS number	[7782-79-8][1]
Properties
Density and phase	? g/cm3, ?
Solubility in water	? g/100 ml (? °C)
Melting point	-80°C (193.15 K)
Boiling point	37°C (310.15 K)
Acidity (pKa)	4.6 to 4.7
Viscosity	? cP at ?°C
Structure
Molecular shape	Linear
Dipole moment	? D
Hazards
MSDS	External MSDS
Main hazards	Highly toxic, explosive.
NFPA 704
Flash point	? °C
R/S statement	R: R1, R2 S: ?
RTECS number	?
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other anions	Hydrogen chloride
Other cations	Sodium azide
Related acids	Hydrochloric acid hydrocyanic acid
Related compounds	Hydrazine
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Hydrazoic acid is a colorless, volatile, and extremely explosive liquid at room temperature and pressure. Image File history File links Download high resolution version (1100x736, 157 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Hydrazoic acid ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula of H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid (I.E how well it splits H+ Ions into smaller molecules to form hydronium of... The pitch drop experiment at the University of Queensland. ... The poise (P) is the cgs unit of viscosity, 1 P = 1 g·cm-1·s-1 The SI analog is 1 pascal second (Pa·s) = 1 kg·m-1·s-1 = 10 P. It is named after Jean Louis Marie Poiseuille. ... four sp³ orbitals three sp² orbitals In chemistry, hybridisation or hybridization (see spelling differences) is the mixing of atomic orbitals belonging to a same electron shell to form new orbitals suitable for the qualitative description of atomic bonding properties. ... The Earths magnetic field, which is approximately a dipole. ... The debye (symbol: D) is a non-SI and non-CGS unit of electrical dipole moment. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... Worker safety and health is the prevention and reduction of the number of occupational safety and health hazards at the places of employment, providing safe and healthful working conditions. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture with air. ... Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... Basic schematic of mass spectrometry Mass spectrometry is an analytical technique used to measure the mass-to-charge ratio of ions. ... An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... R-phrases , S-phrases , , , , Flash point non-flammable Supplementary data page Structure and properties n, εr, etc. ... An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... Sodium azide (NaN3) is a highly toxic chemical that exists as an odorless white solid. ... For other uses, see Acid (disambiguation). ... The chemical compound hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride (HCl) gas. ... Hydrogen cyanide is a chemical compound with chemical formula H-C≡N. A solution of hydrogen cyanide in water is called hydrocyanic acid or prussic acid. ... Hydrazine is a chemical compound with formula N2H4 used as a rocket fuel. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ...

History

It was first isolated in 1890 by Theodor Curtius (Berichte, 1890, 23, p. 3023). 1890 (MDCCCXC) was a common year starting on Wednesday (see link for calendar) of the Gregorian calendar (or a common year starting on Friday of the Julian calendar). ... Geheimrat Professor Dr. Julius Wilhelm Theodor Curtius was professor of Chemistry on Heidelberg University and others. ...

Chemistry

It is soluble in water, and the solution dissolves many metals (zinc, iron, &c.) with liberation of hydrogen and formation of salts (azoiniides, azides or hydrazoates).

All the salts are explosive and readily interact with the alkyl iodides. In its properties it shows some analogy to the halogen acids, since it forms poorly soluble lead, silver and mercurous salts (in which solvent?). The metallic salts all crystallize in the anhydrous form and decompose on heating, leaving a residue of the pure metal. It is a weak acid (pKa 4.6-4.7). The haloalkanes are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, making them a type of organic halide. ...

Production

The acid is formed by acidification of an azide salt such as sodium azide. Sodium azide (NaN3) is a highly toxic chemical that exists as an odorless white solid. ...

The pure acid may be obtained by fractional distillation as a colorless liquid of very unpleasant smell, boiling at 30 C., and extremely explosive.

Toxicity

Hydrazoic acid is volatile and highly poisonous. Its unbearable smell and the violent headache caused by breathing the vapor conspire to make accidental poisoning impossible. The compound acts a non-cumulative poison.

References

• Dictionary of inorganic and organometallic compounds, Chapman & Hall

External links

• OSHA: Hydrazoic Acid

• For a full list of external links, MSDSs, and suppliers of chemical compounds, see Wikipedia:Chemical sources.

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