Sodium formate 5064022 216498045 2008-06-01T22:40:49Z 166.84.1.1 [[WP:UNDO|Undid]] revision 216497458 by [[Special:Contributions/166.84.1.1|166.84.1.1]] ([[User talk:166.84.1.1|talk]]) {{Chembox new | Name = Sodium formate | ImageFile = Sodium-formate-2D.png | ImageSize = 200px | ImageName = Structural formula of sodium formate | OtherNames = formic acid, sodium salt | Section1 = {{Chembox Identifiers | CASNo = 141-53-7 | EINECS = 205-488-0 }} | Section2 = {{Chembox Properties | Formula = HCOONa | MolarMass = 68.01 g/mol | Appearance = white granules<br /> [[deliquescent]] | Density = 1.92 g/cm³, solid (20°C) | Solubility = 97g/100ml water (20°C) | MeltingPt = 253°C | BoilingPt = decomposes | pKa = 7.0-8.5 (0.1M) }} | Section7 = {{Chembox Hazards | EUClass = not listed | NFPA-H = 1 | NFPA-F = | NFPA-R = }} }} '''Sodium formate''', HCOONa, is the sodium salt of [[formic acid]], HCOOH. It usually appears as a white [[deliquescent]] powder. ==Uses== Sodium formate is used in several fabric dying and printing processes. It is also used as a [[buffering agent]] for strong mineral acids to increase their [[pH]]. ==Preparation== Sodium formate can be prepared in the laboratory by neutralizing [[formic acid]] with [[sodium carbonate]]. It can also be obtained by reacting [[chloroform]] with an alcoholic solution of [[sodium hydroxide]]. ::[[chloroform|CHCl<sub>3</sub>]] + 4[[sodium hydroxide|NaOH]] → HCOONa + 3[[sodium chloride|NaCl]] + 2[[water|H<sub>2</sub>O]] or by reacting [[sodium hydroxide]] with [[chloral hydrate]]. ::[[chloral hydrate|C<sub>2</sub>HCl<sub>3</sub>(OH)<sub>2</sub>]] + [[sodium hydroxide|NaOH]] → [[chloroform|CHCl<sub>3</sub>]] + HCOONa + [[water|H<sub>2</sub>O]] The latter method is generally preferred to the former because the low aqueous solubility of [[chloroform|CHCl<sub>3</sub>]] makes it easier to separate out from the sodium formate solution, by [[Fractional crystallization (chemistry)|fractional crystallization]], than the soluble [[sodium chloride|NaCl]] would be. Commercially sodium formate is produced by absorbing [[carbon monoxide]] under pressure in solid [[sodium hydroxide]] at 160 °C ::[[carbon monoxide|CO]] + [[sodium hydroxide|NaOH]] → HCOONa ==See also== * [[sodium acetate]] ==References== {{Unreferenced|date=September 2007}} <references/> [[Category:Formates]] [[Category:Sodium compounds]] [[Category:Inorganic compound stubs]] [[Category:Deliquescent substances]] [[ar:فورمات صوديوم]] [[de:Natriumformiat]] [[it:Formiato di sodio]] [[ja:ギ酸ナトリウム]] [[pl:Mrówczan sodu]] [[pt:Formato de sódio]] [[ru:формиат натрия]] [[fi:Natriumformiaatti]] [[tr:Sodyum format]]