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Potassium persulfate

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Potassium persulfate

EINECS 231-781-8
CAS No. 7727-21-1 Density 2.47
Solubility 5 g/100 mL (20 °C) in water Melting Point 100 °C
Formula K2S2O8 Boiling Point 1689 °C
Molecular Weight 270.33 Flash Point Not combustible
Transport Information UN 1492 5.1/PG 3 Appearance colourless odourless crystals or white powder
Safety 22-24-26-37 Risk Codes 8-22-36/37/38-42/43
Molecular Structure Molecular Structure of 7727-21-1 (Potassium persulfate) Hazard Symbols OxidizingO,HarmfulXn

Peroxydisulfuric acid dipotassium salt;Potassium peroxysulfate;Anthion;Potassium peroxydisulfate;Peroxydisulfuric acid, dipotassium salt;Dipotassium peroxodisulphate;Dipotassium peroxydisulfate;Dipotassium persulfate;


Potassium persulfate Chemical Properties

IUPAC Name: Dipotassium sulfonatooxy sulfate
Synonyms of Potassium persulphate (CAS NO.7727-21-1): Anthion ; Dipotassium peroxydisulfate ; Potassium peroxydisulfate ; Potassium persulfate
CAS NO: 7727-21-1
Molecular Formula: K2S2O8
Molecular Weight: 270.31
Molecular Structure:
EINECS: 231-781-8
H bond acceptors: 8
H bond donors: 2
Freely Rotating Bonds: 3
Polar Surface Area: 143.96 Å2
Vapor density: 9.3 (vs air)
Melting point: 100 °C
Boiling Point: 1689 °C
Water solubility: 5 g/100 mL (20°C)
Stability: Stable. Strong oxidizer. Incompatible with strong reducing agents, organic materials, combustible materials.
Appearance: colourless odourless crystals or white powder
Product Categories of Potassium persulphate (CAS NO.7727-21-1): Inorganics
SMILES: [K+].[K+].O=S(=O)([O-])OOS([O-])(=O)=O
InChI: 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
Std. InChI: 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

Potassium persulfate Uses

 Potassium persulphate (CAS NO.7727-21-1) is used as a food additive and it is also used in organic chemistry as an oxidizing agent for instance in the Elbs persulfate oxidation. Besides, this substance is also used as whitening agent with hydrogen peroxide in hair dye. Further more it is also an important role as initiator for emulsion polymerization.

Potassium persulfate Production

Production of Potassium persulphate (CAS NO.7727-21-1):
 Potassium persulfate can be prepared by electrolysis of a mixture between potassium sulfate and hydrogen sulfate at a high current density.

2 KHSO4 → K2S2O8 + H2 
 Potassium persulfate  can still be prepared by adding potassium hydrogen sulfate (KHSO4) to an electrolyzed solution of ammonium hydrogen sulfate (NH4HSO4).

Potassium persulfate Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 802mg/kg (802mg/kg)   "Documentation of the Threshold Limit Values and Biological Exposure Indices," 5th ed., Cincinnati, OH, American Conference of Governmental Industrial Hygienists, Inc., 1986Vol. 5, Pg. 468, 1986.

Potassium persulfate Safety Profile

Hazard Codes: OxidizingOHarmfulXn
Risk Statements : 8-22-36/37/38-42/43
R8: Contact with combustible material may cause fire. 
R22: Harmful if swallowed. 
R36/37/38: Irritating to eyes, respiratory system and skin. 
R42/43: May cause sensitization by inhalation and skin contact.
Safety Statements: 22-24-26-37
S22:Do not breathe dust. 
S24:Avoid contact with skin. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37:Wear suitable gloves.
RIDADR: UN 1492 5.1/PG 3
WGK Germany: 1
RTECS: TT5900000
HazardClass: 5.1
PackingGroup: III

Potassium persulfate Specification

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible.
Extinguishing Media: Use extinguishing media most appropriate for the surrounding fire.
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage: Store in a cool, dry place. Store in a tightly closed container.

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