Difference between revisions of "Sodium metaphosphate"
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== Description == | == 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 ([ | + | 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%C2%AE|Calgon®]]), emulsifiers, corrosion inhibitors, and dental abrasives. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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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 | ||
| − | == | + | == 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 | + | | 1184 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.18 | + | | 2.18 G/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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| − | == | + | ==Resources and Citations== |
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* 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