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Used primarily in oilfield drilling, sodium pentaborate provides lubrication and stabilization in wells and downhole drilling.
When used in drilling fluids, sodium pentaborate can:
Sodium pentaborate can be added to cement reinforcements that stabilize drilled well bore walls. Borates adsorb into the surfaces of cement grains, reacting with the available calcium ions to form calcium borate coatings that are a barrier to grain hydration and cement setting.
Sodium pentaborate can be used as a precursor for making isotopically enriched boron-10 materials that are necessary to ensure the safety within nuclear power stations.
Molecular weight: 295.1 or (590.2)
Relative density: 1.69 at 20°C
Melting point/freezing point: >500°C
Appearance: White, crystalline solid
Solubility: Water: 7.5% at 10°C; 51.0% at 100°C
Stability: Product is stable under normal ambient temperatures: (-40°C to 40°C)
Boric oxide, B2O3: 58.98%
Sodium oxide, Na2O: 10.5%
Water of crystallization, H2O: 30.52%
U.S. Borax product grades explained
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