K2S2O7 — Properties & Data | MatWorld

K2S2O7

ceramic

· JVASP-57254· K2S2O7

Potassium disulfate (K₂S₂O₇) is an inorganic ceramic compound belonging to the sulfate family, commonly encountered as a byproduct in industrial sulfuric acid production and as a laboratory reagent. It serves primarily in metallurgical applications—particularly in metal pickling, surface treatment, and ore processing—where its strong oxidizing and acidic properties facilitate corrosion and scale removal from steel and other metals. This material is notable for its thermal stability at moderate temperatures and its compatibility with aqueous processing streams, making it a cost-effective alternative to other mineral acids and oxidants in heavy industrial settings.

metal pickling and descalingsteel surface treatmentore processingindustrial acid production byproductlaboratory oxidizing reagentcorrosion control

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.09422	lb/in³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	5.702	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.647	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000779	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.0000707	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-139.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	476.8	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.754	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.

K2S2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental