Sodium chlorite
Sodium chlorite is an inorganic compound with formula NaClO2.
- 1Names
- 2Formulae and structures
- 3Properties
- 4Constituents
- 5Thermodynamic properties
- 6Solubility
- 7Hazards
- 8Preparations
- 9Chemical reactions
- 10References
- 11Related substances
- 12Related categories
Names
List of substance names
- Typical name
- Sodium chlorite
- Compositional nomenclature
- Sodium chlorite
- Additive nomenclature
- Sodium dioxidochlorate(1−)
Formulae and structures
List of formulae
- Typical formula
- NaClO2
- Compositional formula
- NaClO2
- Structural formula
- Structural formula with no lone pair
- Other structural formulas
- Lewis structure
- Colored Lewis structure
Properties
List of substance properties
- Name
- Sodium chlorite
- Formula
- NaClO2
- Appearance
- Colorless solid
- Odor
- Odorless
- Molar mass
- 90.44 g/mol
- Density
- –
- Melting point
- 180–200 °C[1]Decompose → NaCl, O2
- Boiling point
- –
Constituents
Constituent ions
Ion | Name | Charge number | Number |
---|---|---|---|
Na+ | Sodium ion | 1 | 1 |
ClO2− | Chlorite ion | -1 | 1 |
Constituent atoms
Atom | Name | Oxidation state | Number |
---|---|---|---|
Na | Sodium | +1 | 1 |
Cl | Chlorine | +3 | 1 |
O | Oxygen | −2 | 2 |
Ratio of atoms
Atom | Atomic weight | Number | Atomic ratio | Weight ratio |
---|---|---|---|---|
Na | 22.990 | 1 | 25.00% | 25.42% |
Cl | 35.45 | 1 | 25.00% | 39.20% |
O | 15.999 | 2 | 50.00% | 35.38% |
Thermodynamic properties
Phase transition properties
- Enthalpy of fusion
- –
- Enthalpy of vaporization
- –
- Enthalpy of vaporization at 25°C
- –
- Enthalpy of other transition
- –
Standard thermodynamic properties
State | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
---|---|---|---|---|
Crystalline solid | −307.02[2] | – | – | – |
Ionized aqueous solution | −306.7[2] | −244.7[2] | 160.2[2] | – |
Crystalline solid 3 hydrate | −1192.77[2] | – | – | – |
Solubility
Qualitative solubility
Solubility in water (g/100 mL)[1]
17°C |
---|
34 |
Solubility curve (g/100 mL)
Hazards
GHS label[3]
- Hazard pictograms
GHS03: Flame on circle GHS06: Skull and crossbones GHS07: Exclamation mark GHS08: Health hazard GHS09: Environment
- Signal word
- Danger
- Hazard statements
- H272: May intensify fire oxidizer
- H301: Toxic if swallowed
- H310: Fatal in contact with skin
- H330: Fatal if inhaled
- H315: Causes skin irritation
- H319: Causes serious eye irritation
- H320: Causes eye irritation
- H341: Suspected of causing genetic defects
- H371: May cause damage to organs
- H371: May cause damage to respiratory system
- H371: May cause damage to kidney
- H373: May cause damage to organs through prolonged or repeated exposure
- H373: May cause damage to heart through prolonged or repeated exposure
- H373: May cause damage to blood system through prolonged or repeated exposure
- H400: Very toxic to aquatic life
- H410: Very toxic to aquatic life with long lasting effects
Physical hazards[3]
Health hazards[3]
Environmental hazards[3]
Preparations
Reaction of acid and base
The reaction of chlorous acid and sodium hydroxide yields sodium chlorite and water.
Reaction of basic oxide and acid
The reaction of sodium oxide and chlorous acid yields sodium chlorite and water.
Reaction of nonmetal and hydroxide base
The reaction of and sodium hydroxide yields sodium chlorite, sodium chloride, and water.
Decomposition
Decomposition of thermally decomposable substance can yield sodium chlorite.
Chemical reactions
Electrolytic dissociation
Electrolytic dissociation of sodium chlorite yields sodium ion and chlorite ion.
Reaction with strong acid
The reaction of sodium chlorite and strong acid yields salt of strong acid and chlorous acid.
Reaction with reducing species
The reaction of reducing species and sodium chlorite yields a variety of products.
Reaction with oxidizable species
The reaction of oxidizable species and sodium chlorite yields a variety of products.
Reaction with oxidizable species under acidic condition
The reaction of oxidizable species, sodium chlorite, and hydrogen ion yields a variety of products.
Reaction with oxidizable species under neutral condition
The reaction of oxidizable species, sodium chlorite, and water yields a variety of products.
Reaction with oxidizing species
The reaction of sodium chlorite and oxidizing species yields a variety of products.
Reaction with hardly oxidizable species
The reaction of hardly oxidizable species and sodium chlorite yields a variety of products.
Reaction with oxidizing species under acidic condition
The reaction of sodium chlorite, oxidizing species, and hydrogen ion yields a variety of products.
Reaction with hardly oxidizable species under acidic condition
The reaction of hardly oxidizable species, sodium chlorite, and hydrogen ion yields a variety of products.
Reaction with oxidizing species under neutral condition
The reaction of sodium chlorite, oxidizing species, and water yields a variety of products.
Precipitation reaction
When a certain chemical species is present in aqueous solution, it reacts with sodium chlorite to form a precipitate.
Electrolysis of aqueous solution
Electrolysis of aqueous sodium chlorite yields a variety of products.
Decomposition
Decomposition of sodium chlorite yields a variety of products.
References
List of references
- 1James G. Speight (2017)Lange's Handbook of Chemistry, 17th editionMcGraw Hill Education
- 2Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- 3Chemical Management CenterGHS Classification ResultsNational Institute of Technology and Evaluation