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Other names |
Ammonium Peroxydisulfate |
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Identifiers |
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CAS number |
7727-54-0 |
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Properties |
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Molecular formula |
(NH 4 ) 2 S 2 O 8 |
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Molar mass |
228.18 g/mol |
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Appearance |
white crystals |
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Melting point |
120 °C (393 K) (decomposes) |
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Solubility in water |
80 g/100 ml (25 °C) |
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Related compounds |
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Other cati*** |
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Ammonium persulfate (NH 4 ) 2 S 2 O 8 is a strong oxidizing agent. It is very soluble in cold water, a large fall of temperature accompanying solution. It is a very strong oxidizing agent and a radical initiator . It is used to etch copper on printed circuit boa*** as an alternative to ferric chloride solution. [1] It is also used along with tetramethylethylenediamine to catalyze the polymerization of acrylamide in making a polyacrylamide gel.
Ammonium persulfate was prepared by H. Marshall by the method used for the preparation of potassium persulfate — by the electrolysis of a solution of ammonium sulfate and sulfuric acid .
Ammonium persulfate is the main component of Nochromix . On dissolving in sulfuric acid , it is used to clean laboratory glassware as a metal-free alternative to chromic acid baths.