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・ Sodium methylparaben
・ Sodium methylsulfinylmethylide
・ Sodium molybdate
・ Sodium monofluorophosphate
・ Sodium monothiophosphate
・ Sodium myreth sulfate
・ Sodium myristate
・ Sodium naphthalenide
・ Sodium nitrate
・ Sodium nitride
・ Sodium nitrite
・ Sodium nitroprusside
・ Sodium nonanoyloxybenzenesulfonate
・ Sodium orthophenyl phenol
・ Sodium orthovanadate
Sodium oxalate
・ Sodium oxide
・ Sodium oxybate
・ Sodium pareth sulfate
・ Sodium perborate
・ Sodium percarbonate
・ Sodium perchlorate
・ Sodium periodate
・ Sodium permanganate
・ Sodium peroxide
・ Sodium peroxynitrate
・ Sodium perrhenate
・ Sodium persulfate
・ Sodium pertechnetate
・ Sodium phenoxide


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Sodium oxalate : ウィキペディア英語版
Sodium oxalate

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Sodium oxalate, or disodium oxalate, is the sodium salt of oxalic acid with the formula Na2C2O4. It is usually a white, crystalline, odorless powder, that decomposes at 250–270 °C.
Disodium oxalate can act as a reducing agent, and it may be used as a primary standard for standardizing potassium permanganate (KMnO4) solutions.
The mineral form of sodium oxalate is natroxalate. It is only very rarely found and restricted to extremely sodic conditions of ultra-alkaline pegmatites.〔http://rruff.geo.arizona.edu/doclib/hom/natroxalate.pdf Handbook of Mineralogy〕
==Preparation==
Sodium oxalate can be prepared through the neutralization of oxalic acid with sodium hydroxide (NaOH) in a 1:2 acid-to-base molar ratio. Half-neutralization can be accomplished with NaOH in a 1:1 ratio which produces NaHC2O4, monobasic sodium oxalate or sodium hydrogenoxalate.
Alternatively, it can be produced by decomposing sodium formate by heating it at a temperature exceeding 360 °C.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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