| IUPAC name
| Other names
Permanganate of sodium
| NaMnO4 (ahydrous)|
|Molar mass|| 141.9254 g/mol (anhydrous)|
159.94 g/mol (monohydrate)
|Density||1.972 g/cm3 (monohydrate)|
|Melting point||170 °C (338 °F; 443 K) (trihydrate)|
|90 g/100 ml|
|Solubility||Readily soluble in acetone|
|Vapor pressure||~0 mmHg|
|Safety data sheet||Spectrum (monohydrate)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|9,000 mg/kg (rat, oral)|
| Ammonium permanganate|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium permanganate is a chemical compound with the formula NaMnO4, more commonly encountered as monohydrate. It is closely related to the more common potassium permanganate, though it's not as often encountered.
Sodium permanganate is a strong oxidizer.
Addition of conc. sulfuric acid will yield manganese heptoxide.
Sodium permangate is a red or purplish solid, very soluble in water.
Sodium permangante is sometimes sold by chemical suppliers.
- 2 MnO2 + 3 NaOCl + 2 NaOH → 2 NaMnO4 + 3 NaCl + H2O
While easy to do, this reaction will only give small amounts of sodium permanganate, as during the process most of the hypochlorite decomposes.
The substitution reaction between sodium sulfate and calcium or barium permanganate will also give sodium permanganate. This route is attractive due to the very high solubility of sodium permanganate. However, due to the poor solubility of the precursors, this process may take a while.
A less known route involves the addition of calcium hypochlorite and sodium hydroxide to a concentrated solution of manganese(II) chloride. The resulting product is heated on a steam bath, then purified. The resulting sodium permanganate solution is determined to be fairly concentrated. While it was believed that the permanganate from this route was obtained from the chlorate derived from the decomposition of the hypochlorite during heating, a repeat of this method using potassium chlorate gave no permanganate.
Sodium permanganate cannot be prepared analogously to the route to KMnO4 because the required intermediate manganate salt, Na2MnO4, is unstable and does not form.
- Make manganese heptoxide
Sodium permangante is a strong oxidizer and should be handled with proper protection.
In airtight containers.
- Grimm, H. G.; Peters, C.; Wolff, H.; Zeitschrift fuer Anorganische und Allgemeine Chemie; vol. 236; (1938); p. 57 - 77
- Zaretskii, S. A.; Zharnitskii, I. G.; Bogdanova, I. A.; Soviet Electrochem. Proc. 4th Conf. Electrochem., Moscow 1956 (1959), New York 1961, Bd. III, pp. 110/3
- Agladze, R. I.; Domanskaya, G. M.; Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation); vol. 24; (1951);
- Baxter, G. P.; Frevert; American Chemical Journal; vol. 34; (1905); p. 114 - 114