Calcium borate

Calcium borate

Names
IUPAC names Calcium borate
Identifiers
CAS Number	12007-56-6^Y
3D model (JSmol)	Interactive image
ChemSpider	118685^Y
ECHA InfoCard	100.034.131
PubChem CID	134660
UNII	80UKT9A6QU^Y
CompTox Dashboard (EPA)	DTXSID70930103 DTXSID1091555, DTXSID70930103
InChI InChI=1S/2BO3.3Ca/c2*2-1(3)4;;;/q2*-3;3*+2^Y Key: VLCLHFYFMCKBRP-UHFFFAOYSA-N^Y 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
SMILES [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-]
Properties
Chemical formula	Ca3(BO3)2
Molar mass	237.852 g/mol
Appearance	bluish white crystal
Hazards
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	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 ^YN ?) Infobox references

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

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

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.