Potassium Persulfate

CAS 7727-21-1  ·  K₂O₈S₂  ·  MW 270.33 g/mol

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3D model Potassium Persulfate, CAS 7727-21-1, molecular formula K₂O₈S₂, molar mass 270.33 g/mol
About Potassium Persulfate

Potassium Persulfate is a chemical compound registered under number CAS 7727-21-1, with the molecular formula K₂O₈S₂, and a molar mass of 270.33 g/mol.

The molecule contains 12 atoms connected by 9 chemical bonds. The full systematic IUPAC name of this compound is dipotassium;sulfonatooxy sulfate. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, polar surface area PSA = 150 Ų, 0 donors and 8 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.

Physicochemical properties
Molecular formulaK₂O₈S₂
Molar mass270.33 g/mol
IUPACdipotassium;sulfonatooxy sulfate
SMILES[O-]S(=O)(=O)OOS(=O)(=O)[O-].[K+].[K+]
InChIKeyUSHAGKDGDHPEEY-UHFFFAOYSA-L
logP (XLogP3)—
PSA150 Ų
HBD / HBA0 / 8
PubChem CIDCID 24412 ↗
GHS safety

Signal word: Danger

GHS03
GHS03
GHS07
GHS07

H272 — May intensify fire; oxidiser

H302 — Harmful if swallowed

H335 — May cause respiratory irritation

H315 — Causes skin irritation

H319 — Causes serious eye irritation

H334 — May cause allergy or asthma symptoms or breathing difficulties if inhaled

H317 — May cause an allergic skin reaction

Scientific literature

Related literature

4 articles · 0 open access · Sources: PubMed, OpenAlex, Semantic Scholar

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📈 Publication timeline (number of articles: 4)

2001: number of articles 220012022: number of articles 120222024: number of articles 12024

Bar height = number of articles in a given year. Hover over a bar to see details.

Data from PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary generated by Semantic Scholar TLDR. Articles marked with require paid access.

Synonyms
POTASSIUM PERSULFATE · 7727-21-1 · Anthion · Potassium peroxydisulfate · Potassium peroxodisulfate · Potassium peroxydisulphate · Dipotassium persulfate · Dipotassium peroxydisulfate · potassium persulphate · Peroxydisulfuric acid, dipotassium salt · 6B86K0MCZC · Potassium peroxydisulfate (K2(S2O8)) · Peroxydisulfuric acid (((HO)S(O)2)2O2), dipotassium salt · DTXCID809690 · NSC-326763
Data sources
Related molecules
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
PREDICTED MODEL — NOT VERIFIED
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data

No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94 force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.

This substance consists of 3 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.

Methods and references
  1. RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
  2. Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
  3. Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
  4. Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
  5. Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
  6. Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
  7. Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/24412
  8. Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
Potassium Persulfate (CAS 7727-21-1), K₂O₈S₂ - 3D ball-and-stick molecular model, engraved element symbols (K O S), MolGod STL previewDownload image

MG-STL-7727-21-1-ENGRAVED · 242,714 △ · 12 MB · SHA-256 765a8e3c7399c644

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Potassium Persulfate (CAS 7727-21-1), K₂O₈S₂ - 3D ball-and-stick molecular model, MolGod STL previewDownload image

MG-STL-7727-21-1-NORMAL · 5,088 △ · 249 KB · SHA-256 8209d3f284ad0f61

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Model
Potassium Persulfate · 7727-21-1
InChIKey
USHAGKDGDHPEEY-UHFFFAOYSA-L
License
CC BY-SA 4.0 International (source rights undetermined — not yet granted)
Attribution
MolGod Scientific — Potassium Persulfate (CAS 7727-21-1)
License & provenance record
Potassium Persulfate (CAS 7727-21-1) →
MolGod molecule record
Potassium Persulfate →
Source data
PubChem CID 24412 ↗
Model information
STL generated by MolGod · MolGod STL Exporter build 48804cd20b0d · generated 2026-10-14
SHA-256 (STL)
8209d3f284ad0f61df3f10db5401fc03b29b6754f9662c4064b84c1cb762149d
MD5 (STL)
0ca2cf9a947600830512ffb82c73e892
Model identifier
MG-STL-7727-21-1
Transformation
MolGod Scientific ball-and-stick mesh
Changes
PREDICTED geometry computed by MolGod Scientific (RDKit), NOT verified; rendered as a triangulated mesh.
Wikimedia Commons
not published yet

This license applies to the MolGod-created STL mesh, not automatically to third-party source material.

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