BORON PHOSPHATE Chemical Properties

Melting point:

1400°C

Density 

2.52 g/mL at 25 °C(lit.)

form 

Powder

Specific Gravity

2.81

color 

White

Water Solubility 

Insoluble in water.

CAS DataBase Reference

13308-51-5(CAS DataBase Reference)

EPA Substance Registry System

Boron phosphate (B(PO4)) (13308-51-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

22-24/25-26

TSCA 

Yes

HS Code 

2835299000

MSDS

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BORON PHOSPHATE Usage And Synthesis

Chemical Properties

white not hygroscopic crystal(s); prepared by reacting boric acid and phosphoric acid up to 1200°C: B(OH)3+H3PO4=BPO4+3H2O; used in special glasses [HAW93]

Physical properties

Physical Properties White infusible solid; density 1.873 g/mL; sublimates slowly above 1,450°C; soluble in water, decomposes to phosphoric acid and boric acid; pH of 1% solution is ~2.0.

Uses

Boron phosphate is used as an acid catalyst for dehydration of alcohols to olefins; isomemization of olefins; nitration of aromatic hydrocarbons; polymerization of aldehydes and other synthetic reactions. It also is used as a flux in silica-based porcelain and ceramics; special glasses; and acid cleaners.

Uses

Boron phosphate is used as a catalyst for dehydration as well as in other organic reactions. It is employed as a source of phosphates involved in the exchange reaction to prepare metal phosphates. It finds application in refractories, ceramics and flame-retardants.

Preparation

Boron phosphate is prepared by heating an equimolar mixture of boric acid and phosphoric acid at 1,000 to 1,200°C:
H₃BO₃ + H₃PO₄ → BPO₄ + 3H₂O
Various preparative methods are adopted at nonstoichiometric formulations, incomplete dehydration or using oxide additives to obtain boron phosphate of varying purity for its catalytic applications. The compound also forms hydrates (tri- tetra-, penta-, and hexahydrates) which readily decompose in water to phosphoric acid and boric acid.

Flammability and Explosibility

Non flammable

BORON PHOSPHATE(13308-51-5)Related Product Information

• Phosphoric acid
• Barium boron oxide
• Stannous pyrophosphate
• Barium titanate
• Ammonium boron phosphate
• PHOSPHATE STANDARD
• BORON PHOSPHATE