Sodium Sulfite

Na₂SO₃

IUPAC: Sodium sulfite

CAS: 7757-83-7

Overview

Sodium sulfite is a white solid used as a food preservative and antioxidant. It is the most common sulfiting agent in the food industry.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 3 15.9990
Sodium Na 2 22.9900
Sulfur S 1 32.0600

Elemental Composition

O
Oxygen ×3
38.1%
Na
Sodium ×2
36.5%
S
Sulfur ×1
25.4%

Uses

  • • Food preservative
  • • Photography developer
  • • Water treatment
  • • Paper pulping

Fun Facts

  • ✦ Sulfite sensitivity affects about 1% of the population, more common in asthmatics

Safety

  • ⚠ Can trigger asthma in sensitive individuals

Structure

SMILES

[O-]S(=O)[O-].[Na+].[Na+]

Properties

Type
salt
State
solid
Molar Mass
126.04 g/mol
Density
2.6330 g/cm³
Melting Point
33.4 °C
Solubility
280 g/L at 25°C

Molecular Descriptors

Exact Mass
125.9364
TPSA
82.4 Ų
H-Bond Donors
0
H-Bond Acceptors
4
Rotatable Bonds
0
Heavy Atoms
6
Complexity
18.0

Related Compounds

Ammonium Bicarbonate

NH₄HCO₃

Ammonium Chloride

NH₄Cl

Ammonium Sulfate

(NH₄)₂SO₄

Barium Carbonate

BaCO₃

Barium Chloride

BaCl₂

Barium Sulfate

BaSO₄

Cadmium Sulfide

CdS

Calcium Acetate

Ca(C₂H₃O₂)₂

Calcium Carbonate

CaCO₃

Calcium Citrate

Ca₃(C₆H₅O₇)₂

Frequently Asked Questions

What is Sodium Sulfite?
Sodium Sulfite (Na₂SO₃) is a salt compound with the IUPAC name Sodium sulfite.
What is the molecular weight of Sodium Sulfite?
Sodium Sulfite has a molar mass of 126.04 g/mol.
What state is Sodium Sulfite at room temperature?
Sodium Sulfite is a solid at room temperature.
Is Sodium Sulfite organic or inorganic?
Sodium Sulfite is classified as an inorganic compound.
What elements make up Sodium Sulfite?
Sodium Sulfite (Na₂SO₃) is composed of Oxygen (O), Sodium (Na), Sulfur (S).