Natriummetaphosphat

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P405：Unter Verschluss aufbewahren.

sodium hexametaphosphate Chemische Eigenschaften,Einsatz,Produktion Methoden

• S-Sätze Betriebsanweisung:

  S24/25:Berührung mit den Augen und der Haut vermeiden.

• Chemische Eigenschaften

  white granular solid

• Chemische Eigenschaften

  The sodium polyphosphates class consists of several amorphous, water soluble polyphosphates composed of linear chains of metaphosphate units, (NaPO3)x where x ≥ 2, terminated by Na2PO4- groups. They are usually identified by their Na2O/ P2O5 ratio or their P2O5 content. The Na2O/P2O5 ratios vary from about 1.3 for sodium tetrapolyphosphate, where x = approximately 4; through about 1.1 for Graham’s salt, commonly called sodium hexametaphosphate, where x = 13 to 18; to about 1.0 for the higher molecular weight sodium polyphosphates, where x = 20 to 100 or more. The pH of their solution varies from about 3 to 9. For additional details of description, refer to Burdock (1997).

• Verwenden

  Sodium Hexametaphosphate is a sequestrant and moisture binder that is very soluble in water but dissolves slowly. solutions have a ph of 7.0. it permits peanuts to be salted in the shell by making it possible for the salt brine to penetrate the peanuts. in canned peas and lima beans, it functions as a tenderizer when added to the water used to soak or scald the vegetables prior to canning. it improves whipping properties in whipping proteins. it functions as a seques- trant for calcium and magnesium, having the best sequestering power of all the phosphates. it prevents gel formation in sterilized milk. it is also termed sodium metaphosphate and graham’s salt.

• Verwenden

  sodium hexametaphosphate is a chelating agent and a corrosion inhibitor. This is an inorganic salt.

• Verwenden

  For industrial use, such as oil field, paper-making, textile, dyeing, petrochemical industry,tanning industry, metallurgical industry and building material industry, It is mainly used as a water sortening agent in solution for printing, dyeing ,and boiler; Diffusant in papermersing medium, high temperature agglomerant,detergent and soil analytical chemistry reagent,

• synthetische

  Sodium hexametaphosphate is prepared by heating monosodium phosphate (NaH2PO4) rapidly to a clear melt, which occurs slightly above 625°C. Rapid chilling of this melt produces a very soluble glass, which is then crushed or milled.

• Landwirtschaftliche Anwendung

  Sodium metaphosphate is the salt of metaphosphoric acid having a molecular formula (NaPO₃)_n, where n ranges from 3 to 10 (for cyclic molecules) or may be much larger (for polymers).
  Cyclic molecules have alternate phosphorus and oxygen atoms in the rings and start with trimetaphosphate (NaPO₃)₃ to at least decametaphosphate.
  Sodium hexametaphosphate may be a polymer where n is between 10 and 20.
  Vitreous sodium phosphates have a Na₂O:P₂O₅ ratio near unity and are called Graham's salts. The average number of phosphorus atoms in these vitreous glasses ranges from 25 to infinity.

• Industrielle Verwendung

  Sodium hexametaphosphate (SHMP) or water glass Na₆P₆O₁₈ is basically the salt of metaphosphoric acid. SHMP is difficult to dissolve. By mixing SHMP for 1-3 h, a solution of 8-10% can be obtained. The pH of this solution is about 5. Because of a weak acid reaction, the SHMP reacts with cations of bivalent metals forming Na₂MeP₆O₁₈ or Na₄MeP₆O₁₈. In the presence of oxygen, SHMP slowly decomposes into pyrophosphate and orthophosphate.

• Sicherheitsprofil

  Poison by intravenous route. Moderately toxic by intraperitoneal and subcutaneous routes. Wdly toxic by ingestion. When heated to decomposition it emits toxic fumes of PO, and Na2O. See also PHOSPHATES.

• Properties and Applications

  TEST ITEMS	SPECIFICATION
  APPEARANCE	WHITE POWDER
  TOTAL PHOSPHATE(P 2 O 5 )	68.0% min
  INACTIVE PHOSPHATE (P 2 O 5 )	7.5% max
  WATER-INSOLUBLE MATTER	0.05% max
  Fe CONTENT	0.05% max
  pH VALUE 1% AQUEOUS SOLUTION	5.8-7.3
  As	-
  Pb	-
  F	-

sodium hexametaphosphate Upstream-Materialien And Downstream Produkte

Natriummetaphosphat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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