Ammonium persulfate

Ammonium persulfate
Other names	Ammonium peroxydisulfate
Identifiers
CAS number	7727-54-0 Y
EC number	231-786-5
UN number	1444
RTECS number	SE0350000
SMILES	O=S(=O)([O-])OOS([O-])(=O)=O.[NH4+].[NH4+]
InChI	1/2H3N.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h2*1H3;(H,1,2,3)(H,4,5,6)
InChI key	ROOXNKNUYICQNP-UHFFFAOYAL
ChemSpider ID	56400
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
LD50	689 mg/kg, oral (rat)
Related compounds
Other anions	Ammonium thiosulfate Ammonium sulfite Ammonium sulfate
Other cations	Sodium persulfate Potassium persulfate
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ammonium persulfate (NH₄)₂S₂O₈ is a strong oxidizing agent. It is very soluble in cold water, a large fall of temperature accompanying solution. 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.

References

1. ^ "Ammonium Persulphate: Copper Etchant". MG Chemicals. http://www.mgchemicals.com/products/410.html. 
2. ^ 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. 
3. ^ "Nochromix". Sigma-Aldrich. http://www.sigmaaldrich.com/catalog/search/SpecificationSheetPage/ALDRICH/328693. Retrieved 2008-03-01. 

External links

• International Chemical Safety Card 0632

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