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Borax Pentahydrate


Formula: Na2B4O7.5H2O
Alternate Names: Borax 5 Mol, Sodium Tetraborate, Borax 5-hydrate

Oxide Weight201.20
Formula Weight291.17
If this formula is not unified correctly please contact us.

Consists of white crystalline granules or powder. It is mildly alkaline in solution. The advantages of this material vs. the decahydrate form lie in the lower transportation, handling and storage costs of a more concentrated product. 74.6 lb. of this material are equivalent to 100 lb. of decahydrate.

It is stable under ordinary conditions, free-flowing, and easily handled by air or mechanical conveying.

Borax pentahydrate is currently produced at Bandirma Borax Plant in Turkey and at Rio Tinto in California.

The amazing fluxing power of boron (in borax)

The amazing fluxing power of boron (in borax)

The two top clay bars contain 15% hydrous borax. At cone 06, a very low temperature, it has already melted and drained out of the bars, running down over the others as a glass.

Out Bound Links

In Bound Links

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Borax Pentahydrate" descrip="Etibor-48" searchkey="Borax 5 Mol, Sodium Tetraborate, Borax 5-hydrate" loi="0.00" casnumber="71377-02-1"> <oxides> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="21.290" tolerance=""/> <oxide symbol="B2O3" name="Boric Oxide" status="" percent="47.800" tolerance=""/> </oxides> <volatiles> <volatile symbol="H2O" name="Water" percent="30.900" tolerance=""/> </volatiles> </material>

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