Sodium nitrite is the inorganic compoond wi the chemical formula NaNO2. It is a white tae slicht yellaeish crystalline pouder that is very soluble in watter an is hygroscopic. It is a uiseful precursor tae a variety o organic compoonds, such as pharmaceuticals, dyes, an pesticides, but it is probably best kent as a fuid additive tae prevent botulism.

Sodium nitrite
Sodium nitrite
Natriumnitrit.png
The nitrite anion (space-fillin model)#
The sodium cation
Natriumnitrit Elementarzelle.png
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.028.687
EC Nummer 231-555-9
E nummer E250 (preservatives)
RTECS nummer RA1225000
UNII
UN nummer 1500
Properties
NaNO2
Molar mass 68.9953 g/mol
Appearance white or slichtly yellaeish solid
Density 2.168 g/cm3
Meltin pynt 271 °C (520 °F; 544 K)
84.8 g/100 mL (25 °C)
Solubility soluble in methanol (4.4 g/100 mL)
ethanol
slichtly soluble in diethyl ether (0.3 g/100 mL)
very soluble in ammonia
Acidity (pKa) ~9
Refractive index (nD) 1.65
Structur[1]
orthorhombic
Space group Im2m
a = 3.5653(8) Å, b = 5.5728(7) Å, c = 5.3846(13) Å
2
Thermochemistry
Std enthalpy o
formation
ΔfHo298
−359 kJ·mol−1[2]
Hazards
EU clessification Oxidising agent O Toxic T Dangerous for the Environment (Naitur) N
R-phrases R8, R25, R50
S-phrases (S1/2), S45, S61
NFPA 704
Lethal dose or concentration (LD, LC):
180 mg/kg (rats, oral)
Relatit compoonds
Ither anions
Lithium nitrite
Sodium nitrate
Ither cations
Potassium nitrite
Ammonium nitrite
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references

ReferencesEedit

  1. T. Gohda, M. Ichikawa (1996). "The Refinement of the Structure of Ferroelectric Sodium Nitrite". Journal of the Korean Physical Society. 29: 551–554. Unknown parameter |month= ignored (help)
  2. Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 0-618-94690-X.