Difference between pages "Sodium metasilicate" and "Sodium phosphate, dibasic"

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== Description ==
 
== Description ==
  
−
White, crystalline powder or solid. Sodium metasilicate is the dry form of sodium silicate. It is used in detergents and cleaning products.
+
White, crystalline, hygroscopic powder. Dibasic sodium phosphate, or DSP, occurs in several hydrated forms from anhydrous to dodecahydrate. It is used in the manufacture of [[dye|dyes]], fertilizers, [[detergent|detergents]], [[ceramic|ceramics]], and [[enamel%2C%20inorganic|enamels]]. DSP is used as a [[sequestrant|sequestrant]], [[emulsifier|emulsifier]], and [[flame%20retardant|fire retardant]]. It acts as a [[mordant|mordant]] in dyeing and is used for weighting [[silk|silk]]. DSP is also used as a replacement for [[borax|borax]] in [[solder|soldering]] and [[brazing%20solder|brazing]]. In addition, DSP is used in [[bleaching%20agent|bleach]] baths for color photographs.
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 +
== Synonyms and Related Terms ==
 +
 
 +
DSP; disodium phosphate; secondary sodium orthophosphate; disodium hydrogen phosphate; phosphate of soda; Sorensen's phosphate (dihydrate)
 +
 
 +
[[[SliderGallery rightalign|sodium phosphate, dibasic.jpg~Chemical structure]]]
  
 
== Risks ==
 
== Risks ==
  
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* Noncombustible.
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* Nonflammable.   
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* Highly corrosive.
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* Thermo Fisher; {https://www.fishersci.com/store/msds?partNumber=AC124992500&productDescription=SODIUM+PHOSPHATE+DIBASIC+250GR&vendorId=VN00032119&countryCode=US&language=en SDS]
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* Reacts with moisture.
 
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* Contact causes burns.   
 
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* Gelest: [https://www.gelest.com/wp-content/uploads/product_msds/SIS6982.0-msds.pdf SDS]
 
  
 
== Physical and Chemical Properties ==
 
== Physical and Chemical Properties ==
  
−
Soluble in water (pH =12.6 for 1% solution). Insoluble in ethanol, acids, salt solutions.
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Soluble in water, ethanol.
  
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
 
! scope="row"| Composition
 
! scope="row"| Composition
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| Na2SiO3
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| Na2HPO4 - xH2O
 
|-
 
|-
 
! scope="row"| CAS
 
! scope="row"| CAS
−
| 6834-92-0
+
| 7558-79-4
 
|-
 
|-
 
! scope="row"| Melting Point
 
! scope="row"| Melting Point
−
| 1089 C
+
| 240 C
 
|-
 
|-
 
! scope="row"| Density
 
! scope="row"| Density
−
| 2.614 g/ml
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| 2.07 g/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
−
| mol. wt. = 122.1
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| mol. wt. = 141.96
 +
|-
 +
! scope="row"| Refractive Index
 +
| 1.4412, 1.4424, 1.4526
 
|}
 
|}
 +
 +
==Resources and Citations==
 +
 +
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 +
 +
* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979
 +
 +
* Thomas C. Jester (ed.), ''Twentieth-Century Building Materials'', McGraw-Hill Companies, Washington DC, 1995
 +
 +
* ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
 +
 +
* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
 +
 +
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 8805
 +
 +
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
 +
 +
* ''CRC Handbook of Chemistry and Physics'', Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980  Comment: ref. index = 1.4412, 1.4424, 1.4526
 +
 +
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 10:08, 2 June 2022

Description

White, crystalline, hygroscopic powder. Dibasic sodium phosphate, or DSP, occurs in several hydrated forms from anhydrous to dodecahydrate. It is used in the manufacture of dyes, fertilizers, detergents, ceramics, and enamels. DSP is used as a Sequestrant, Emulsifier, and fire retardant. It acts as a Mordant in dyeing and is used for weighting Silk. DSP is also used as a replacement for Borax in soldering and brazing. In addition, DSP is used in bleach baths for color photographs.

Synonyms and Related Terms

DSP; disodium phosphate; secondary sodium orthophosphate; disodium hydrogen phosphate; phosphate of soda; Sorensen's phosphate (dihydrate)

Chemical structure

Sodium phosphate, dibasic.jpg


Risks

Physical and Chemical Properties

Soluble in water, ethanol.

Composition Na2HPO4 - xH2O
CAS 7558-79-4
Melting Point 240 C
Density 2.07 g/ml
Molecular Weight mol. wt. = 141.96
Refractive Index 1.4412, 1.4424, 1.4526

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Thomas C. Jester (ed.), Twentieth-Century Building Materials, McGraw-Hill Companies, Washington DC, 1995
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8805
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index = 1.4412, 1.4424, 1.4526

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