Sodium sulfite (Na₂SO₃) is an inorganic ceramic compound commonly encountered as a white crystalline powder or granular solid in industrial chemistry applications. It functions primarily as a reducing agent, preservative, and bleaching auxiliary rather than as a structural ceramic material. In engineering practice, Na₂SO₃ appears in pulp and paper bleaching processes, water treatment systems (for dechlorination and oxygen scavenging), food preservation, and chemical manufacturing; its selection is driven by cost-effectiveness and chemical reactivity rather than mechanical properties, distinguishing it from load-bearing ceramics.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 38.19 | GPa | — | ||
Poisson's Ratio(ν) | 0.2900 | - | — | ||
Shear Modulus(G) | 3.170 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.380 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.4365 range 0.000–0.8730median of 2 measurements | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -12.23 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.5839 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.891 | eV/atom | — | ||
| ↳ | -1.247 | eV/atom | — |