K2SO3

ceramic

· JVASP-10251· K2SO3

Potassium sulfite (K₂SO₃) is an inorganic ceramic compound belonging to the sulfite family, characterized by its ionic crystal structure and moderate mechanical properties. This material finds primary application in chemical processing, pulp and paper manufacturing (as a bleaching and reducing agent), and water treatment systems, where its solubility and chemical reactivity are valued. K₂SO₃ is chosen in industrial contexts where sulfite chemistry is essential—particularly in kraft pulping processes and as a food preservative—though it is less commonly specified for structural engineering applications compared to oxide ceramics; its use reflects process chemistry requirements rather than mechanical performance.

pulp and paper bleachingwater treatmentchemical processingfood preservationreducing agent applicationsinorganic synthesis

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	5,217	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3600	-	DFT · OptB88vdW
Shear Modulus(G)	1,905.8	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.08938	lb/in³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	5.116	eV	DFT · OptB88vdW
↳	7.332	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.751	-	DFT · OptB88vdW
↳	2.240	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000991	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000421	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-320	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	413.5	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)	0.04000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.869	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.

K2SO3 — Properties & Data | MatWorld

K2SO3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental