Ammonium persulfate
| Ammonium persulfate | |
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Other names
Ammonium peroxydisulfate |
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| Identifiers | |
| CAS number | 7727-54-0  |
| ChemSpider | 56400 |
| UNII | 22QF6L357F |
| EC number | 231-786-5 |
| UN number | 1444 |
| RTECS number | SE0350000 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | (NH4)2S2O8 |
| Molar mass | 228.18 g/mol |
| Appearance | white to yellowish crystals |
| Density | 1.98 g/cm3 |
| Melting point |
120 °C (393 K) decomp. |
| Solubility in water | 80 g/100 ml (25 °C) |
| Hazards | |
| MSDS | External MSDS |
| EU Index | 016-060-00-6 |
| EU classification | Oxidant (O) Harmful (Xn) Irritant (Xi) |
| R-phrases | R8, R22, R36/37/38, R42/43 |
| S-phrases | (S2), S22, S24, S26, S37 |
| NFPA 704 |
 0
2
2
OX
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| LD50 | 689 mg/kg, oral (rat) |
| Related compounds | |
| Other anions | Ammonium thiosulfate Ammonium sulfite Ammonium sulfate |
| Other cations | Sodium persulfate Potassium persulfate |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Ammonium persulfate (APS) (NH4)2S2O8 is a strong oxidizing agent. It is very soluble in water; the dissolution of the salt in water is endothermic. It is a radical initiator. It is used to etch copper on printed circuit boards 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.[2]
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.[3] It is also a standard ingredient in western blot gels and hair bleach.
Safety [edit]
Airborne dust may be irritating to eye, nose, throat, lung and skin upon contact. Exposure to high levels of dust may cause difficulty in breathing.[4]
References [edit]
- ^ "Ammonium Persulphate: Copper Etchant". MG Chemicals.
- ^ Hugh Marshall (1891). "LXXIV. Contributions from the Chemical Laboratory of the University of Edinburgh. No. V. The persulphates". J. Chem. Soc., Trans. 59: 771. doi:10.1039/CT8915900771.
- ^ "Nochromix". Sigma-Aldrich. Retrieved 2008-03-01.[dead link]
- ^ [1] FMC Corporation, MSDS sheet dated: 06/26/2009
For a review of its uses in organic chemistry see Encyclopedia of Reagents for Organic Synthesis, vol. 1, pp. 193–197(1995).
External links [edit]
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