BARIUM METAPHOSPHATE Chemical Properties

Melting point:

1560 °C (lit.)

solubility 

H2O: insoluble(lit.)

form 

Powder

Water Solubility 

Insoluble in water. Soluble in acids by a slow dissolution

CAS DataBase Reference

13762-83-9

Safety Information

Hazard Codes 

Xn

Risk Statements 

20/22

Safety Statements 

28

RIDADR 

UN 1564 6.1/PG 3

WGK Germany 

1

F 

3

HazardClass 

6.1

PackingGroup 

III

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

BARIUM METAPHOSPHATE Usage And Synthesis

Chemical Properties

White powder. Slowly soluble in acids; insoluble in water.

Uses

Barium metaphosphate, used in glasses, porcelains, and enamels, as a flame retardant and in phosphors applications.

Uses

Glasses, porcelains, and enamels.

Preparation

Barium metaphosphate can be prepared by the solidstate reaction of metaphosphoric acid and the hydroxide, oxide or carbonate of barium:
BaCO3 + HPO3 + heat ? Ba(PO3)2 +H2O + CO2
The best temperature to use is about 700°C. It has the CAS number of 13762-83-9 and the molecular weight of 295.2709 g/mol. If diammonium phosphate is used instead of solid metaphosphoric acid, the product is not pure. Colored glasses are obtained caused by the reduction of P-atoms in the phosphate anion by hydrogen released from NH3 to form colloidal dispersions of P4 which produce various colors in the glass. b-Ba(PO3)2 is the final product. This compound can also be prepared by the aqueous reactions:
NaPO3 (aq) + BaCl2 (aq) ? Ba(PO3)2 (solid) + NaCl (aq)
or
Ba(OH)2 (solid) + 2HPO3 (aq) ? Ba(PO3)2 (solid) + 2H2O
The dissolution and reaction involving HPO3 are slow and should be carried out in a hot solution. Evaporation at a low temperature (<15°C) serves to form the crystals. The product involves several hydrates depending upon the conditions of precipitation. Anhydrous barium metaphosphate is a white porous powder or granular material that is insoluble in water.

BARIUM METAPHOSPHATE(13762-83-9)Related Product Information

• Orthophosphorus acid
• Magnesium fluoride
• Phosphotungstic acid hydrate
• Strontium carbonate
• Magnesium fluosilicate
• Barium carbonate
• Barium titanate
• Metaphosphoric acid
• Magnesium titanium oxide
• LITHIUM METABORATE
• Aluminum metaphosphate
• SODIUM METASILICATE PENTAHYDRATE
• AMMONIUM (META)TUNGSTATE HYDRATE
• Sodium metavanadate
• Calcium Perphosphate
• Magnesium hypophosphate
• Barium Peroxyphosphate
• Strontium Peroxyphosphate