Sodium oxide (Disodium oxide)

Source of the photo
http://www.chemspider.com/Chemical-Structure.66599.html
Author of the description
Vaszita Emese

 

CHEMICAL SUBSTANCE DATASHEET

 

 

CHEMICAL SUBSTANCE IDENTIFICATION

Chemical name

Sodium Oxide

Synonyms

Disodium oxide, Disodium monoxide [1]

IUPAC name

disodium;oxygen(2-) [1], DISODIUM OXIDE

Oxyde de sodium, Sodium hydroxide, SODIUM OXID [2]

CAS No

1313-59-3, Disodium oxide [2, 4].

12401-86-4, sodium oxide [3]

REACH registration number

 

EC No

215-208-9, Disodium oxide [2]

235-641-7, sodium oxide [3]

Molecular formula

Na2O

Substance group/chemical family

Inorganic/alkali metal oxide

Appearance

Physical state

Odour

Form

Colour

 

Solid

Odourless

crystalline: antifluorite (face centered cubic) crystal structure

white

USES AND HANDLING ISSUES

Relevant identified uses

This substance is manufactured and/or imported in the European Economic Area in 10 - 100 tonnes per year. It is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing. [2]

Adsorbents and absorbents, finishing agents, graveling and road bed material, intermediates, ion exchange agents, process regulators, processing aids, specific to petroleum production, other industrial function; Air care products, building/construction materials not covered elsewhere, metal products not covered elsewhere, not known or reasonably ascertainable, paints and coatings, personal care products. [1]

Handling considerations

Stored separated from strong acids and food and feedstuffs. Inhalation prevention by breathing protection and exhaust, skin prevention by gloves and protective clothing, eye prevention by face shield or eye protection in combination with breathing protection if powder, ingestion prevention by not eating, drinking or smoking during work [1]

PHYSICO-CHEMICAL PROPERTIES

Molecular weight

61.979 g/mol [1, 4].

Bulk density/Specific gravity

2.3 g/cm³ [1, 4].

pH

the solution in water is a strong base [1]

EC

 

Melting point

1275°C (sublimes) [1]

Boiling point

1950 °C 

Flash point

non combustible

Flammability

Not combustible but enhances combustion of other substances. [1, 4].

Vapour density

 

Vapour pressure

 

Solubility in water

reacts violently to form NaOH [1]

Solubility in organic solvents

reacts with ethanol

Hydrolysis

 

Ionicity in water

 

Surface tension

 

Dispersion properties

 

Stability and reactivity

Chemical stability

Stable. Reacts violently with water, acids and with many other compounds [7].

Reactivity hazards

Reacts violently with water producing sodium hydroxide. Decomposes at >400°C. This produces sodium peroxide and sodium. Attacks many metals in the presence of water [4].

Corrosivity

It reacts violently with acid and it is corrosive [1, 4].

Polimerization

 

Incompatibility with various substances

For fire fighting NO water. Use dry powder, dry sand [4].

Special remarks on reactivity

 

Physical, chemical and biological coefficients

Koc

 

Kow

 

pKa

 

Henry-constant

 

ENVIRONMENTAL FATE AND BEHAVIOUR

Artificial pollution sources

 

 

 

 

Natural pollution sources

Release to the environment of this substance can occur from industrial use: as processing aid, in the production of articles, in processing aids at industrial sites and as an intermediate step in further manufacturing of another substance (use of intermediates). Other release to the environment of this substance is likely to occur from: indoor use and outdoor use resulting in inclusion into or onto a materials (e.g. binding agent in paints and coatings or adhesives) [5].

General terrestrial fate

 

General aquatic fate

 

General atmospheric fate

 

General persistence and degradability

 

Abiotic degradation and metabolites

 

Biodegradation and metabolites

Under test conditions no biodegradation observed [5]

Bioconcentration

No potential for bioaccumulation [5]

Volatilization

 

Photolysis

 

Hydrolysis

 

Soil adsorption and mobility

 

ENVIRONMENTAL CONCENTRATIONS

Measured data

 

ECOTOXICOLOGICAL INFORMATION

General adverse effects on ecosystem    Not suspected to be an environmental toxin  [6]

Acute toxicity (LC50, EC50)

Aquatic systems

Terrestrial systems

No data available: testing technically not feasible [5]

No hazard identified [5]

Chronic toxicity (NOEC, LOEC)

 

Aquatic systems

Terrestrial systems

 

HUMAN HEALTH EFFECTS and PROTECTION

Routes of human exposures

Inhalation, ingestion, skin, eye contact. [1, 4].

General effects

Serious by all routes of exposure. The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the aerosol may cause lung oedema. [1, 4].

Endocrine disruption

 

Mutagenicity

 

Carcinogenicity

 

Reprotoxicity

Classified as not expected to be potentially toxic or harmful in terms of organ system toxicity (non-reproductive) [6]

Teratogenicity

 

Skin, eye and respiratory irritations

 

Metabolism: absorption, distribution & excretion

The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the aerosol may cause lung oedema. [1, 4].

Exposure limits

 

Drinking water MAC

 

Other information

Genetic toxicity: No adverse effect observed (negative) (Toxicity – InVitro) (1 study: not feasible) [5]

Animal toxicity data

Acute toxicity (LD50)

 

Chronic toxicity (NOEL, LOEL)

 

ENVIRONMENTAL STANDARDS AND REGULATIONS

EINECS regulation

235-641-7 [5, 7]

OSHA regulations etc.

 

 

OTHER INFORMATION, SPECIAL REMARKS

   

CREATED, LAST UPDATE

09th of July, 2018

11th of July, 2018

 

REFERENCES

[1] PUBCHEM - NIH, US National Library of Medicine, National Center for Biotechnology Information, Open Chemistry Database, Available from:

https://pubchem.ncbi.nlm.nih.gov/compound/Sodium_oxide#section=Top, Accessed: 9th of July, 2018.

[2] European Chemicals Agency (ECHA). Substance information. Available from: https://echa.europa.eu/hu/substance-information/-/substanceinfo/100.013.827, Accessed: 9th of July, 2018.

[3] European Chemicals Agency (ECHA). Substance information. Available from: https://echa.europa.eu/hu/substance-information/-/substanceinfo/100.032.388, Accessed: 9th of July, 2018.

[4] INCHEM - International Programme on Chemical Safety,  Available from: http://www.inchem.org/documents/icsc/icsc/eics1653.htm, Accessed: 10th of July, 2018

[5] European Chemicals Agency (ECHA). Brief profile. Available from: https://echa.europa.eu/hu/brief-profile/-/briefprofile/100.013.827, Accessed: 10th of July, 2018.

[6] EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry. https://www.ewg.org/skindeep/ingredient/723860/SODIUM_OXIDE/#.W0S6VtJLjcs, Accessed: 10th of July, 2018.

[7] Chemical Book, Sodium oxide, Available from: https://www.chemicalbook.com/ProductChemicalPropertiesCB7942374_EN.htm, Accessed: 10th of July, 2018.