Bariumdimetaphosphat

Bezeichnung:Bariumdimetaphosphat

CAS-Nr13762-83-9

Englisch Name:BARIUM METAPHOSPHATE

CBNumberCB2329833

SummenformelBaO6P2

Molgewicht295.27

MOL-Datei13762-83-9.mol

Synonyma

Bariumdimetaphosphat

Bariumdimetaphosphat physikalisch-chemischer Eigenschaften

Schmelzpunkt	1560 °C (lit.)
Löslichkeit	H2O: insoluble(lit.)
Aggregatzustand	Powder
Wasserlöslichkeit	Insoluble in water. Soluble in acids by a slow dissolution
CAS Datenbank	13762-83-9

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/22
S-Sätze:	28
RIDADR	UN 1564 6.1/PG 3
WGK Germany	1
F	3
HazardClass	6.1
PackingGroup	III

Gefahreninformationscode (GHS)

BARIUM METAPHOSPHATE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/22:Gesundheitsschädlich beim Einatmen und Verschlucken.
S-Sätze Betriebsanweisung:
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
Chemische Eigenschaften
White powder. Slowly soluble in acids; insoluble in water.
Verwenden
Glasses, porcelains, and enamels.
Verwenden
Barium metaphosphate, used in glasses, porcelains, and enamels, as a flame retardant and in phosphors applications.
synthetische
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.

Bariumdimetaphosphat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

13762-83-9, BARIUM METAPHOSPHATE Verwandte Suche:

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