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|Section2= |Section3= |Section4= }} Sodium hexametaphosphate (SHMP) is a hexamer of composition (NaPO3)6.〔Van Wazer, John R. ''Phosphorus and its compounds''. New York : Interscience Publishers (1958)〕 Sodium hexametaphosphate of commerce is typically a mixture of polymeric metaphosphates, of which the hexamer is one, and is usually the compound referred to by this name. It is more correctly termed sodium polymetaphosphate. ==Uses== SHMP is used as a sequestrant and has applications within a wide variety of industries, including as a food additive in which it is used under the E number E452i. Sodium carbonate is sometimes added to SHMP to raise the pH to 8.0–8.6, which produces a number of SHMP products used for water softening and detergents. A significant use for sodium hexametaphosphate is as a deflocculant in the production of clay-based ceramic particles.〔''The Role Of Sodium Hexametaphosphate In The Dissolution Process Of Kaolinite And Kaolin''F. Andreola; E.Castellini; T.Manfredini; M.Romagnoli. Journal Of The European Ceramic Society, Volume 24, Number 7, June 2004.〕〔''Impact Of Dispersants On The Mechanical Strength Development Of Alumina-Spinel Self-Flowing Refractory Castables.'' Sasan Otroj, Mohammad Reza Nilforushan, Arash Daghighi, Reza Marzban. Ceramics – Silikáty 54 (3) 284–289 (2010)〕〔''Effect Of Adding Sodium Hexametaphosphate Liquefier On Basic Properties Of Calcium Phosphate Cements''. S. Hesaraki; A. Zamanian; F. Moztarzadeh. Journal of Biomedical Materials Research Part A. Vol. 88A, No. 2, 2009〕〔''Study Of Clay’s Mineralogy Effect On Rheological Behavior Of Ceramic Suspensions Using An Experimental Design.'' Afef Jmal Ayadi; Julien Soro; Amel Kamoun; Samir Baklouti. International Journal of Recent Research and Applied Studies 14 (2). February 2013.〕 It is also used as a dispersing agent to break down clay and other soil types.〔ASTM D422 – 63(2007) Standard Test Method for Particle-Size Analysis of Soils.〕 It is used as an active ingredient in toothpastes as an anti-staining and tartar prevention ingredient.〔(Crest Pro-Health Frequently Asked Questions )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sodium hexametaphosphate」の詳細全文を読む スポンサード リンク
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