Potassium persulfate

Potassium persulfate is the inorganic compound with the formula K2S2O8. Also known as potassium peroxydisulfate, it is a white solid that is sparingly soluble in cold water, but dissolves better in warm water. This salt is a powerful oxidant, commonly used to initiate polymerizations.

Not to be confused with Potassium peroxymonosulfate.
Potassium persulfate
Names
Other names
potassium peroxydisulfate
Anthion
potassium perdisulfate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.893
EC Number
  • 231-781-8
E number E922 (glazing agents, ...)
RTECS number
  • SE0400000
UNII
UN number 1492
  • InChI=1S/2K.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2 N
    Key: USHAGKDGDHPEEY-UHFFFAOYSA-L N
  • InChI=1/2K.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2
    Key: USHAGKDGDHPEEY-NUQVWONBAA
  • [O-]S(=O)(=O)OOS(=O)(=O)[O-].[K+].[K+]
Properties
K2S2O8
Molar mass 270.322 g/mol
Appearance white powder
Odor odorless
Density 2.477 g/cm3
Melting point < 100 °C (212 °F; 373 K) (decomposes)
1.75 g/100 mL (0 °C)
4.49 g/100 mL (20 °C)
Solubility insoluble in alcohol
1.467
Structure
triclinic
Hazards
GHS labelling:
Danger
H272, H302, H315, H317, H319, H334, H335, H371
P220, P261, P280, P305+P351+P338, P342+P311
NFPA 704 (fire diamond)
2
0
1
OX
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
802 mg/kg (oral, rat)
Safety data sheet (SDS) ICSC 1133
Related compounds
Other anions
 Potassium sulfite
Potassium sulfate
Potassium peroxymonosulfate
Other cations
 Sodium persulfate
Ammonium persulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.