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Calcium borate
Names
IUPAC names
Calcium borate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.131 Edit this at Wikidata
UNII
  • InChI=1S/2BO3.3Ca/c2*2-1(3)4;;;/q2*-3;3*+2 checkY
    Key: VLCLHFYFMCKBRP-UHFFFAOYSA-N checkY
  • InChI=1/4BO3.6Ca/c4*2-1(3)4;;;;;;/q4*-3;6*+2
    Key: KKKYJLNWARAYSD-UHFFFAOYAA
  • InChI=1/2BO3.3Ca/c2*2-1(3)4;;;/q2*-3;3*+2
    Key: VLCLHFYFMCKBRP-UHFFFAOYAG
  • [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-]
Properties
Ca3(BO3)2
Molar mass 237.852 g/mol
Appearance bluish white crystal
Hazards
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
590 mg/kg (oral, mouse)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Calcium borate is a borate salt of calcium with the molecular formula Ca3(BO3)2. It can be prepared by reacting calcium metal with boric acid. The resulting precipitate is calcium borate. A hydrated form occurs naturally as the minerals colemanite[1], nobleite[2] and priceite[3].

Use

[edit]

Calcium borate is used as a binder in some grades of hexagonal boron nitride for hot pressing.

Other uses include as a flame retardant in epoxy molding compounds, a ceramic flux in some ceramic glazes, reactive self-sealing binders in hazardous waste management,[4] additive for insect-resistant polystyrene,[5] fertilizer, and in the production of boron glasses.

It is used as a main source of boron oxide in the manufacturing of ceramic frits used in ceramic glaze or ceramic engobe for wall and floor ceramic tiles.[citation needed]

References

[edit]
  1. ^ "Colemanite". www.mindat.org. Retrieved 2025-12-14.
  2. ^ "Nobleite". www.mindat.org. Retrieved 2025-12-14.
  3. ^ "Priceite". www.mindat.org. Retrieved 2025-12-14.
  4. ^ Calcium borate binders. (PDF) . Retrieved on 2010-02-08.
  5. ^ Calcium borate infused foam building materials and the like and method of making same - US Patent 6667350 Claims Archived 2011-06-12 at the Wayback Machine. Patentstorm.us. Retrieved on 2010-02-08.


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