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Opis
Potassium Persulfate
Other Names: Dipotassium peroxodisulfate, Peroxydisulfuric acid dipotassium salt
CAS Number: 7727-21-1
Sum Formula: K₂S₂O₈
Molar Mass: 270.32 g/mol
Appearance: Colorless to white crystalline solid
Potassium persulfate is a strong oxidizing agent composed of potassium ions and peroxodisulfate anions. It is widely used as a source of free radicals for polymerization initiators, oxidizing reactions, and cleaning processes in various industrial and laboratory applications.
Chemical and Physical Properties
Density: ~2.48 g/cm³
Melting Point: Decomposes above 100°C (no true melting point)
Boiling Point: Decomposes before boiling
Solubility in Water: Moderately soluble (~1.2 g/100 mL at 20°C)
Solubility in Other Solvents: Insoluble in alcohol
Odor: Odorless
Applications
Polymer Industry: Used as an initiator for the polymerization of monomers such as styrene, acrylonitrile, and butadiene.
Chemical Synthesis: Employed as a strong oxidizing agent in organic and inorganic reactions.
Analytical Chemistry: Applied in redox titrations and standardization processes.
Electronics: Used in etching solutions for printed circuit board manufacturing.
Water Treatment: Studied for oxidation of pollutants and advanced oxidation processes.
Safety
Signal Word: Danger
H272 (100%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
H317 (94.8%): May cause an allergic skin reaction [Warning Sensitization, Skin]
H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H334 (100%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
P210, P220, P233, P260, P261, P264, P264+P265, P270, P271, P272, P280, P284, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P333+P317, P337+P317, P342+P316, P362+P364, P370+P378, P403, P403+P233, P405, and P50
Handling and Storage
Storage Conditions: Store in a tightly sealed container in a cool, dry, and well-ventilated place. Keep away from heat sources, organic materials, and reducing agents.
Handling Precautions: Avoid creating dust and direct contact with eyes and skin. Handle with proper PPE and observe standard safety practices.