Sodium bisulfite

 

Sodium bisulfite

Chemical formula	NaHSO3
OTP appearance	white solid
Molar Mass(g/mol)	104.061
Density(g/cc)	1.48
Melting Point(°C)	150
Boiling Point(°C)	315
Solubility in water(g/L)	420*
NFPA 704	0 0 0

Uses

Other

• Producing nitrites (from nitrates)

Production

Synthesis

1. Bubble sulfur dioxide through a sodium hydroxide solution until no more is absorbed

   SO₂(g) + NaOH(aq) → NaHSO₃(aq)

2. Evaporate the solution, giving sodium bisulfite.

Testing

Add any acid e.g. acetic acid and smell the sulfur dioxide produced