(＋) - 酒石酸カリウム - 水(2/1) 化学特性,用途語,生産方法
定義
本品は、酒石酸(*)のカリウム塩であり、次の化学式で表される。
参照表示名称：酒石酸
解説
酒石酸カリウム．DL-，D-，L-，メソ塩がある．市販品の多くはL-塩で，0.5水和物である．これを，DKT(Dikaliumtartratの略称)ということもある．それぞれの形の酒石酸の水溶液を水酸化カリウムまたは炭酸カリウムで中和すると得られる．DL-塩は，水溶液から，無色，単斜晶系の柱状晶の二水和物が得られる．水に易溶．100 ℃ で無水物になる．L-およびD-塩は水溶液から無色，単斜晶系結晶の0.5水和物が得られる．密度約1.984 g cm－3．150 ℃ で水を失い，約200 ℃ で分解がはじまる．水に易溶．水溶液はリトマスに弱アルカリ性を示す．メソ塩は水溶液から無色，三斜晶系結晶の二水和物が得られる．なお，L-塩には，摩擦ルミネセンスがみられ，強い圧電率を示す．緩下剤，圧電素子などに用いられる．
用途
一般分析用、メッキ添加剤、紙の保湿剤
化粧品の成分用途
pH調整剤
説明
Potassium tartrate, dipotassium tartrate or argol has formula K
2C
4H
4O
6. It is the potassium salt of tartaric acid. It is often confused with potassium bitartrate, also known as cream of tartar. As a food additive, it shares the E number E336 with potassium bitartrate.
化学的特性
white crystalline powder
使用
Potassium tartrate is the acid potassium salt of tartaric acid occurring as crystals or powder. It is relatively poorly soluble having a solubility in 100 ml of water at 0.8 g at 25°c and 6.1 g at 100°c. A 1% solution at 30°c has a ph of 3.4. Chemical names are potassium acid tartrate, potassium hydrogen tartrate, and potassium bitartrate. It functions to complex with heavy metal ions and to regulate ph; it can have a gentle laxative action if given at adequate levels. The acidulant is used in chemical leavening to release carbon dioxide which produces the loaf volume. It has limited reactivity in the cold so when used in reduced-temperature batters it has little gas evolution during the initial mixing. At room temperatures, it has a relatively fast reaction rate. It functions as a taste regulator in sugar icing and in controlled crystallization of toffees and fondants by the regulated inversion of sucrose. It is used in baked goods, crackers, candy, and puddings.
定義
ChEBI: The potassium salt of L-tartaric acid.
製造方法
Potassium tartrate is produced by the reaction of tartaric acid with potassium sodium tartrate (rochelle salt), and potassium sulfate, followed by filtration, purification, precipitation and drying.
純化方法
Recrystallise it from distilled water (solubility: 0.4mL/g at 100o, 0.7mL/g at 14o). [Beilstein 3 IV 1223.]
(＋) - 酒石酸カリウム - 水(2/1) 上流と下流の製品情報
原材料
準備製品