| IUPAC name
| Other names
Sodium bismuth oxide
Sodium bismuth trioxide
|Molar mass||279.968 g/mol|
|Appearance||Yellow to yellowish-brown powder|
| Insoluble in cold water|
Reacts with hot water
|Solubility|| Reacts with acids|
Insoluble in most solvents
|Vapor pressure||~0 mmHg|
Std enthalpy of
|Safety data sheet||Sifma-Aldrich (80%)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|420 mg/kg (rat, oral)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium bismuthate is an inorganic chemical compound, a strong oxidizer with chemical formula NaBiO3.
The compound is rarely available pure, and commercial samples may also contain a mixture of bismuth trioxide, sodium carbonate and sodium peroxide. A related compound with the approximate formula Na3BiO4 also exists.
Sodium bismuthate is sensitive to moisture and will slowly decompose upon contact.
- 2 NaBiO3 + H2O → 2 NaOH + Bi2O3 + O2
- NaBiO3 + 6 HCl → NaCl + BiCl3 + Cl2
This reaction is similar to the reaction between potassium permanganate with HCl.
- 2 Mn2+ + 5 NaBiO3 + 14 H+ → 2 MnO4− + 5 Bi3+ + 5 Na+ + 7 H2O
Sodium bismuthate can perform oxidative 1,2-cleavage on glycols, ketols and alpha hydroxy acids with no further oxidation of the (possible) aldehyde products. These cleavages can be done in the presence of acetic or phosphoric acid at room temperature. Alcohols like methanol or ethanol can be used as the reaction media, as they are oxidized slowly with sodium bismuthate.
Sodium bismuthate is a yellow-brown powdered solid, insoluble in cold water and decomposes in hot water.
Sodium bismuthate is sold by chemical suppliers.
- Bi2O3 + 6 NaOH + 2 Br2 → 2 NaBiO3 + 4 NaBr + 3 H2O
The solution in then cooled, to slow the decomposition of the compound. As sodium bismuthate is poorly soluble in water, the resulting product can be easily filtered off.
- Na2O + Bi2O3 + O2 → 2 NaBiO3
- Oxidizing agent
- Test for manganese
- Make permanganate
- Compound collecting
- Separation of actinides (Am, Pu, etc.)
NaBiO3 is a irritant if inhaled. Continued absorption of NaBiO3 into body causes permanent kidney damage.
In closed plastic or glass bottles, away from moisture and acids.
Can be neutralized by exposure to hot water or hydrogen peroxide and the bismuth recycled.
- Kasenov; Zhambekov; Kasenova; Russian Journal of Physical Chemistry; vol. 71; nb. 6; (1997); p. 1024 - 1026
- The Merck index (12th ed.). Chapman & Hall Electronic Pub. Division. 2000. p. 1357
- The Handbook of Preparative Inorganic Chemistry, edited by Georg Brauer. Volume 1 page 627-628
- Greenwood NN (1997). Chemistry of the elements (2nd ed.). Butterworth-Heinemann. p. 578