Na2SO3
ceramic· Na2SO3
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.
pulp and paper processingwater treatment and dechlorinationchemical preservative manufacturingreducing agent in synthesisoxygen scavenging in closed systemsindustrial bleaching auxiliary
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 38.19 | GPa | — | ||
Poisson's Ratio(ν) | 0.2900 | - | — | ||
Shear Modulus(G) | 3.170 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.380 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.