Na2SO3 — Properties & Data | MatWorld

Na2SO3

Name: Na2SO3
Brand: MatWorld

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	5,539	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2900	-	DFT · OptB88vdW
Shear Modulus(G)	459.8	ksi	DFT · OptB88vdW

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Property	Value	Unit	Conditions	Source
Density(ρ)	0.08598	lb/in³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	5.241	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.802	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00141	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000519	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-255.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	359.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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, or test environment.

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.5839	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.247	eV/atom	DFT · OptB88vdW
↳	-1.891	eV/atom	Measured

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

Na2SO3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental