Metaphosphorsure

Bezeichnung:Metaphosphorsure

CAS-Nr10343-62-1

Englisch Name:METAPHOSPHORIC ACID

CBNumberCB9139332

SummenformelHO3P

Molgewicht79.98

MOL-Datei10343-62-1.mol

Synonyma

Metaphosphorsure

Metaphosphorsure physikalisch-chemischer Eigenschaften

Aggregatzustand	pieces
Farbe	Clear
Wasserlöslichkeit	dissolves very slowly in cold H2O to form H3PO4, formation of H3PO4 accelerated by boiling; soluble alcohol [MER06]

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	34
S-Sätze:	26-36/37/39-45
RIDADR	UN 3260 8/PG 3
WGK Germany	3
F	3

Gefahreninformationscode (GHS)

METAPHOSPHORIC ACID Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Beschreibung
Metaphosphoric acid is a singularly anhydrous version of orthophosphoric acid and is sometimes used as a water- or moisture-absorbing reagent. Metaphosphoric acid has phosphorus in the formal oxidation state of ＋5. Although it has several CAS numbers: 10343-62-1, 135306-83-1, 13566-25-1, and 37267-86-0, only the last two are associated with the IUPAC name “phosphenic acid”.
Metaphosphoric acid units can be bonded together in rings (cyclic structures), chains (catena), or branched by condensation yielding water as each acid unit is added. These structures consist of linked metaphosphoric acid molecules. For example, trimetaphosphoric acid is the simplest cyclophosphoric acid. Metaphosphoric acid would need to share the doubly bonded oxygen with neighboring phosphorus atoms to form polymers itself. Many oligamers are possible with the alkaline earths but the trimetaphosphates and hexametaphosphates seem to be the most prevalent.
Chemische Eigenschaften
transparent, glass-like solid or soft silky masses; hygroscopic; volatilizes at red heat (HPO3)n [MER06]
Definition
ChEBI: Phosphonate(1-) is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in phosphonic acid. It is a phosphorus oxoanion and a monovalent inorganic anion. It is a conjugate base of a phosphonic acid. It is a conjugate acid of a phosphonate(2-).

Metaphosphorsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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