Difference between revisions of "Sodium metaphosphate"

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sodium hexametaphosphate; sodium trimetaphosphate; sodium polyphosphate; Maddrell's salt; Calgon; Graham's salts
 
sodium hexametaphosphate; sodium trimetaphosphate; sodium polyphosphate; Maddrell's salt; Calgon; Graham's salts
  
== Other Properties ==
+
== Risks ==
 +
 
 +
* Skin contact can cause irritation.
 +
* Phosphates can be detrimental to the environment. 
 +
* Fisher Scientific: [https://fscimage.fishersci.com/msds/21260.htm MSDS]
 +
 
 +
== Physical and Chemical Properties ==
  
 
pH of aqueous solution = 6.0 - 7.7
 
pH of aqueous solution = 6.0 - 7.7
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|-
 
|-
 
! scope="row"| Melting Point
 
! scope="row"| Melting Point
| 1184
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| 1184 C
 
|-
 
|-
 
! scope="row"| Density
 
! scope="row"| Density
| 2.18
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| 2.18 G/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
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|}
 
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== Hazards and Safety ==
+
==Resources and Citations==
 
 
Skin contact can cause irritation. Phosphates can be detrimental to the environment. 
 
 
 
Fisher Scientific: [https://fscimage.fishersci.com/msds/21260.htm MSDS]
 
 
 
== Sources Checked for Data in Record ==
 
  
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

Latest revision as of 08:18, 2 June 2022

Description

A small polymer, usually 3 to 20 units, of sodium phosphate. Small very long chains form vitreous compounds. Sodium metaphosphate is used as water softeners, sequestrants, detergents (Calgon®), emulsifiers, corrosion inhibitors, and dental abrasives.

Synonyms and Related Terms

sodium hexametaphosphate; sodium trimetaphosphate; sodium polyphosphate; Maddrell's salt; Calgon; Graham's salts

Risks

  • Skin contact can cause irritation.
  • Phosphates can be detrimental to the environment.
  • Fisher Scientific: MSDS

Physical and Chemical Properties

pH of aqueous solution = 6.0 - 7.7

Composition [NaPO3]n
CAS 10124-56-8
Melting Point 1184 C
Density 2.18 G/ml
Molecular Weight mol. wt. = 611.77

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8787

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