Encyclopedia > Borax

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Name Sodium tetraborate decahydrate
Chemical formula Na2B4O7·10H2O
Appearance White solid
Formula weight 381.4 amu
Melting point Decomposes at 348 K (75 °C)
Density 1.7 ×103 kg/m3
Crystal structure ?
Solubility 55 g in 100g water
ΔfH0solid -6289kJ/mol
S0solid 586 J/mol·K
Ingestion GI irritation, large doses may be fatal.
Inhalation May cause irritation.
Skin May cause irritation.
Eyes May cause irritation.
More info Hazardous Chemical Database (http://ull.chemistry.uakron.edu/erd/chemicals/8/7386)
SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references

Borax, (Na2B4O7·10H2O, sodium borate or sodium tetraborate) is an important boron compound. It is a soft white many-sided crystal that dissolves easily in water.

Borax is widely used in washing powders, water softeners and soap. It is used in making enamel glazes, glass and strengthing pottery and ceramics. It is also easily converted to boric acid or borate, which have many applications. Borax was discovered on January 8, 1856 by John Veatch[?].

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