View source for Sodium phosphate, monobasic

== Description ==

White, crystalline powder. Monobasic sodium phosphate, or MSP, is primarily used in baking powder. It also has applications in textile dyeing, electroplating and as a cleaner and emulsifier. In conservation, MSP has been used as a pH buffer in some enzyme-based cleaning gel mixtures (Chapman 1986).

== Synonyms and Related Terms ==

MSP; sodium acid phosphate; sodium biphosphate; sodium orthophosphate; sodium dihydrogen phosphate; monosodium dihydrogen phosphate

== Risks ==

* May be harmful by ingestion.  
* Contact may cause irritation. 

== Physical and Chemical Properties ==

Soluble in water forming sodium metaphosphate at 350-400 C.  pH =4.4 - 4.5 for a 1% solution.  Insoluble in ethanol.

{| class="wikitable"
|-
! scope="row"| Composition
| NaH2PO4 - H2O
|-
! scope="row"| CAS
| 7558-80-7
|-
! scope="row"| Density
| 2.040 g/ml
|-
! scope="row"| Molecular Weight
| mol. wt. = 119.98
|-
! scope="row"| Refractive Index
| 1.4401, 1.4629, 1.4815
|}

==Resources and Citations==

* V. Chapman, "Amylase in a viscous medium: textile applications", ''The Conservator'', no. 10 1986, pp. 7-11.

* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

* ''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 8806

* ''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 = 1.4401, 1.4629, 1.4815



[[Category:Materials database]]