Sodium nitrite

Sodium nitrite

The nitrite anion (space-fillin model)# The sodium cation
Identifiers
CAS Nummer	7632-00-0 Y
3D model (JSmol)	Interactive eemage
ChEMBL	ChEMBL93268 Y
ChemSpider	22689 Y
EC Nummer	231-555-9
PubChem CID	24269
RTECS nummer	RA1225000
UNII	M0KG633D4F Y
UN nummer	1500
InChI InChI=1S/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1 Y Key: LPXPTNMVRIOKMN-UHFFFAOYSA-M Y 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 slichtly yellaeish solid
Density	2.168 g/cm3
Meltin pynt	271 °C (520 °F; 544 K)
Solubility in watter	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
Creestal structur	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 enthalpy o formation ΔfHo298	−359 kJ·mol−1
Hazards
EU clessification	O T N
R-phrases	R8, R25, R50
S-phrases	(S1/2), S45, S61
NFPA 704	0 3 1 OX
Lethal dose or concentration (LD, LC):
LD50 (Median dose)	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).
Y verify (whit is YN ?)
Infobox references

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.