Ammonium persulfate

Ammonium persulfate (APS) is the inorganic compound with the formula (NH4)2S2O8. It is a colourless (white) salt that is highly soluble in water, much more so than the related potassium salt. It is a strong oxidizing agent that is used as a catalyst in polymer chemistry, as an etchant, and as a cleaning and bleaching agent.

Ammonium persulfate
Names
Other names
Ammonium peroxydisulfate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.897
EC Number
  • 231-786-5
E number E923 (glazing agents, ...)
RTECS number
  • SE0350000
UNII
UN number 1444
  • InChI=1S/2H3N.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h2*1H3;(H,1,2,3)(H,4,5,6) Y
    Key: ROOXNKNUYICQNP-UHFFFAOYSA-N Y
  • 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)
    Key: ROOXNKNUYICQNP-UHFFFAOYAL
  • O=S(=O)([O-])OOS([O-])(=O)=O.[NH4+].[NH4+]
  • [NH4+].[NH4+].[O-]S(=O)(=O)OOS(=O)(=O)[O-]
Properties
(NH4)2S2O8
Molar mass 228.18 g/mol
Appearance white to yellowish crystals
Density 1.98 g/cm3
Melting point 120 °C (248 °F; 393 K) decomposes
80 g/100 mL (25 °C)
Solubility Moderately soluble in MeOH
Hazards
GHS labelling:
Danger
H272, H302, H315, H317, H319, H334, H335
P210, P221, P284, P305+P351+P338, P405, P501
NFPA 704 (fire diamond)
2
1
2
OX
Airborne: 0.1 mg/m³ (TWA)
Lethal dose or concentration (LD, LC):
689 mg/kg (rat, oral);
2,000 mg/kg (rat, dermal);
2.95 mg/L for 4 hours (rat, inhalation)
Safety data sheet (SDS) 7727-54-0
Related compounds
Other anions
 Ammonium thiosulfate
Ammonium sulfite
Ammonium sulfate
Other cations
 Sodium persulfate
Potassium persulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references
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