Sodium nitrite
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.
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Identifiers | |||
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3D model (JSmol)
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ChEMBL | |||
ChemSpider | |||
EC Nummer | 231-555-9 | ||
PubChem CID
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RTECS nummer | RA1225000 | ||
UNII | |||
UN nummer | 1500 | ||
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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
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Formula units (Z)
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2 | ||
Thermochemistry | |||
Std enthalpy o formation ΔfH |
−359 kJ·mol−1[2] | ||
Hazards | |||
EU clessification | O T N | ||
R-phrases | R8, R25, R50 | ||
S-phrases | (S1/2), S45, S61 | ||
NFPA 704 | |||
Lethal dose or concentration (LD, LC): | |||
LD50 (Median dose)
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180 mg/kg (rats, oral) | ||
Relatit compoonds | |||
Ither anions
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Lithium nitrite Sodium nitrate | ||
Ither cations
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Potassium nitrite Ammonium nitrite | ||
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |||
verify (whit is ?) | |||
Infobox references | |||
References
eedit- ↑ 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
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ignored (help) - ↑ Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 0-618-94690-X.