Sodium nitrite

 

Sodium nitrite

Chemical formula	{{#Chem:NaNO2}}
OTP appearance	yellowish white solid
Molar Mass(g/mol)	68.9953
Density(g/cc)	2.168
Melting Point(°C)	271
Boiling Point(°C)	320 (decomp)
Solubility in water(g/L)	848
NFPA 704	0 0 0

Uses

Other

Precursor for nitrous acid

Production

Synthesis

via carbon

1. Melt sodium nitrate
2. Add carbon to the melt

   {{#Chem: 2NaNO3(l) + C(s) = 2NaNO2(l) + CO2(g)//reactants burn}}

via sulfite

direct

1. Combine sodium bisulfite and sodium nitrate giving sodium nitrite and sodium bisulfate

   {{#Chem: NaNO3 + NaHSO3 = NaNO2 + NaHSO4}}

in situ

1. Melt sodium nitrate and sodium hydroxide.
2. Add sulfur to the melt giving sodium nitrite and sodium sulfate

   [[3chem

   3NaNO3 + 2NaOH + S = 3 NaNO2 + NaSO4 + 2H2O}}