Borax

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Borax
BORAX.jpg
Names
IUPAC name
Sodium tetraborate decahydrate
Systematic IUPAC name
Sodium borate
Other names
Disodium tetraborate
Sodium tetraborate
Properties
Na2B4O7 (anhydrous)
Na2B4O7·10H2O (decahydrate)
Molar mass 381.38 g/mol (decahydrate)
201.22 g/mol (anhydrate)
Melting point 743 °C (1,369 °F; 1,016 K) (anhydrate)
Boiling point 1,575 °C (2,867 °F; 1,848 K)
Hazards
Related compounds
Related compounds
Boric acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Borax or sodium borate, sodium tetraborate, is an important boron compound. It has the chemical formula Na2B4O7.

Properties

Chemical

Sodium borate will react with a strong acid to release boric acid.

Physical

Borax is a white crystalline solid. It melts at 743 °C and boils at 1,575 °C. It has a density of 1.73 g/cm3.

Availability

Borax is sold by various chemical suppliers.

It is also sold in various pharmacies and iron forgeries.

Preparation

Sodium borate can be made by reacting boric acid with a sodium compound.

Projects

  • Make boric acid
  • Grow borax crystals,borax snowflakes

Handling

Safety

Borax has low toxicity.

Borax was added to the Substance of Very High Concern (SVHC) candidate list on 16 December 2010 in the EU.

Storage

Borax should be stored in closed bottles

Disposal

Sodium tetraborate can be dumped in trash.

References

Relevant Sciencemadness threads