NaSO2 — Properties & Data | MatWorld

NaSO2

ceramic

· JVASP-12772· NaSO2

Sodium sulfite (NaSO₂) is an inorganic ceramic compound that exists primarily as a salt in solid form rather than as a traditional monolithic ceramic. It is commonly encountered as a white crystalline powder with hygroscopic properties and moderate mechanical stiffness. Industrial applications include food preservation (as a sulfite preservative), pulp and paper bleaching, water treatment, and chemical manufacturing as a reducing agent; engineers select it for processes requiring controlled oxidation-reduction chemistry rather than for structural load-bearing roles. While not a primary engineering structural ceramic, its low cost, chemical reactivity, and solubility in water make it valuable in process chemistry and corrosion mitigation contexts where ceramic alternatives would be inappropriate.

food preservation and additivespulp and paper processingwater treatment chemicalsreducing agent synthesiscorrosion inhibitionlaboratory reagent

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	32.21	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1700	-	DFT · OptB88vdW
Shear Modulus(G)	13.77	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	2.441	kg/m³	DFT · OptB88vdW

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Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.256	eV	DFT · OptB88vdW
↳	16.07	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.071	-	DFT · OptB88vdW
↳	1.256	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00198	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000724	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-358	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	353.1	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	DFT · TBmBJ

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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.1255	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.555	eV/atom	DFT · OptB88vdW

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.

NaSO2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental