Not to be confused with sodium nitrate, sodium nitride, or nitratine.
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Sodium nitrite
The nitrite anion (space-filling model)
The sodium cation
Unit cell of sodium nitrite under standard conditions
Names
IUPAC name
Sodium nitrite
Identifiers
CAS Number
7632-00-0Y
3D model (JSmol)
Interactive image
ChEBI
CHEBI:78870N
ChEMBL
ChEMBL93268Y
ChemSpider
22689Y
ECHA InfoCard
100.028.687
EC Number
231-555-9
E number
E250 (preservatives)
KEGG
D05865
PubChem CID
23668193
RTECS number
RA1225000
UNII
M0KG633D4FY
UN number
1500 3287
CompTox Dashboard (EPA)
DTXSID0020941
InChI
InChI=1S/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1Y
Key: LPXPTNMVRIOKMN-UHFFFAOYSA-MY
InChI=1/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1
Key: LPXPTNMVRIOKMN-REWHXWOFAO
SMILES
N(=O)[O-].[Na+]
Properties
Chemical formula
NaNO2
Molar mass
68.9953 g/mol
Appearance
white or slightly yellowish crystalline solid
Density
2.168 g/cm3
Melting point
271 °C (520 °F; 544 K) (decomposes at 320 °C)
Solubility in water
71.4 g/(100 mL) (0 °C)
84.8 g/(100 mL) (25 °C)
160 g/(100 mL) (100 °C)
Solubility in methanol
4.4 g/(100 mL)
Solubility in ethanol
Soluble
Solubility in diethyl ether
0.3 g/(100 mL)
Solubility in ammonia
Very soluble
Acidity (pKa)
~9
Magnetic susceptibility (χ)
−14.5·10−6 cm3/mol
Refractive index (nD)
1.65
Structure[1]
Crystal structure
Orthorhombic
Space group
Im2m
Lattice constant
a = 3.5653(8) Å, b = 5.5728(7) Å, c = 5.3846(13) Å
Formula units (Z)
2
Thermochemistry
Std molar entropy (S⦵298)
106 J/(mol·K)
Std enthalpy of formation (ΔfH⦵298)
−359 kJ/mol[2]
Gibbs free energy (ΔfG⦵)
−295 kJ/mol
Pharmacology
ATC code
V03AB08 (WHO)
Hazards
GHS labelling:[3]
Pictograms
Signal word
Danger
Hazard statements
H272, H301, H319, H400
Precautionary statements
P220, P273, P301+P310, P305+P351+P338
NFPA 704 (fire diamond)
3
0
1
OX
Autoignition temperature
489 °C (912 °F; 762 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose)
180 mg/kg (rats, oral)
Safety data sheet (SDS)
"Sodium nitrite". Safety Data Sheet. Sigma-Aldrich. 28 December 2022.
Related compounds
Other anions
Sodium nitrate
Other cations
Potassium nitrite
Ammonium nitrite
Lithium nitrite
Silver nitrite
Related compounds
Nitrous acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Chemical compound
Sodium nitrite is an inorganic compound with the chemical formula NaNO2. It is a white to slightly yellowish crystalline powder that is very soluble in water and is hygroscopic. From an industrial perspective, it is the most important nitrite salt. It is a precursor to a variety of organic compounds, such as pharmaceuticals, dyes, and pesticides, but it is probably best known as a food additive used in processed meats and (in some countries) in fish products.[4]
^Gohda T, Ichikawa M (November 1996). "The Refinement of the Structure of Ferroelectric Sodium Nitrite". Journal of the Korean Physical Society. 29: 551–554.
^Zumdahl SS (2009). Chemical Principles (6th ed.). Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
^"GESTIS-Stoffdatenbank sodium nitrite". gestis.dguv.de. Retrieved 10 December 2021.
^Laue W, Thiemann M, Scheibler E, Wiegand KW (2006). "Nitrates and Nitrites". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a17_265. ISBN 978-3-527-30673-2.
Sodiumnitrite is an inorganic compound with the chemical formula NaNO2. It is a white to slightly yellowish crystalline powder that is very soluble in...
The nitrite ion has the chemical formula NO− 2. Nitrite (mostly sodiumnitrite) is widely used throughout chemical and pharmaceutical industries. The nitrite...
Amyl nitrites were part of some kits used to treat cyanide poisoning, containing amyl nitrite, sodiumnitrite, and sodium thiosulfate. The nitrites were...
cured meats containing sodium nitrate and nitrite, have been linked to gastric cancer and esophageal cancer. Sodium nitrate and nitrite are associated with...
to as "poppers", alkyl nitrites represent recreational drugs. Organic nitrites are prepared from alcohols and sodiumnitrite in sulfuric acid solution...
the combustion of other materials. Like other nitrite salts such as sodiumnitrite, potassium nitrite is toxic if swallowed, and laboratory tests suggest...
or fungus. Curing salts are generally a mixture of sodium chloride (table salt) and sodiumnitrite, and are used for pickling meats as part of the process...
addition of concentrated sulfuric acid to a cooled mixture of an aqueous sodiumnitrite solution and an alcohol. The intermediately-formed stoichiometric mixture...
results in preventing bacterial growth, nitrate and nitrite (in the forms of sodiumnitrite and sodium nitrate) have increased in popularity for their consistent...
to bimetallic construction, the application of sodium molybdate is preferred over sodiumnitrite. Sodium molybdate has the advantage in that the dosing...
states that sodiumnitrite may be safely used: "As a color fixative in smoked cured tunafish products so that the level of sodiumnitrite does not exceed...
Kenneth Law (born 1965) is a Canadian man who was charged with shipping sodiumnitrite, a potentially lethal substance, to people intending to kill themselves...
origin (such as from celery) vs. "synthetic" sodiumnitrite. An analogy would be purified "sea salt" vs. sodium chloride – both being exactly the same chemical...
and production started in 1972. The plant produces chemicals like sodiumnitrite, sodium nitrate and other allied chemicals, dyes, hexamethylene tetramine...
acid is usually generated by acidification of aqueous solutions of sodiumnitrite with a mineral acid. The acidification is usually conducted at ice temperatures...
Making dry sausages involves curing salts, which contain sodiumnitrite and sodium nitrate. Nitrites are used for all types of sausages and are the most common...
members on the site, as well as the site's promotion of the use of sodiumnitrite as a method of suicide, a previously obscure method. One New York Times...
following antidotal agents and their effects: oxygen, sodium thiosulfate, amyl nitrite, sodiumnitrite, 4-dimethylaminophenol, hydroxocobalamin, and dicobalt...
discontinued because it gives slow and inconsistent results compared with sodiumnitrite preparations such as "Prague powder" or pink "curing salt". Even so...
Sodium oxide is produced by the reaction of sodium with sodium hydroxide, sodium peroxide, or sodiumnitrite: 2 NaOH + 2 Na → 2 Na2O + H2 To the extent...
solutions of sodium and sodiumnitrite in the complete absence of water. Disodium nitrite reacts with water to form sodiumnitrite, sodium hydroxide and...
sodium nitroprusside overdose includes the following: Discontinuing sodium nitroprusside administration Buffering the cyanide by using sodiumnitrite...
situations. Unlike 1080, it cannot be used for aerial application. Sodiumnitrite is a naturally occurring substance commonly used as a meat preservative...
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