Sodium nitrite

 

Sodium nitrite

Chemical formula	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 amyl nitrite and nitrous acid

Production

Synthesis

via carbon

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

   2 NaNO₃(l) + C(s) → 2 NaNO₂(l) + CO₂(g) // reactants burn

via sulfite

direct

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

   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}}