Sodium persulfate sample
| IUPAC name
| Other names
|Molar mass||238.10 g/mol|
|Density|| 2.59 g/cm3|
(Loose bulk density: 1.12 g/cm3)
|Melting point||180 °C (356 °F; 453 K) (decomposes)|
|55.6 g/100 ml (20 °C)|
|Vapor pressure||~0 mmHg|
|Safety data sheet||Sigma-Aldrich|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
| 920 mg/kg (rat, female, oral)|
930 mg/kg (rat, male, oral)
| Ammonium persulfate|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium persulfate is preferred by many chemists over other persulfate salts, as it has good solubility in water and long shelf-life, while also having better performance than other persulfate salts.
Sodium persulfate is an oxidizer. It is a common oxidizing agent in Elbs persulfate oxidation or Boyland–Sims oxidation.
Sodium persulfate is a white solid, soluble in water.
Sodium persulfate can be bought from various electronic shops, as etching powder for zinc and printed circuit boards, as well as for pickling of copper and some other metals.
The salt is prepared by the electrolytic oxidation of sodium bisulfate:
- 2 NaHSO4 → Na2S2O8 + H2
Oxidation is conducted at a platinum anode.
- PCB etchant
- Make permanganates
- Make benzaldehyde from benzyl alcohol
- Elbs persulfate oxidation
- Boyland–Sims oxidation
Sodium persulfate is an oxidizer and forms combustible mixtures with organic materials such as paper.
In closed plastic or glass bottles.
Can be neutralized by heating it, which causes it to decompose.