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* Ледяная уксусная к-та -- потемнела, можно ли использовать --

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Fry

18.09.2009 10:42

URL #1

Уважаемые форумчане, столкнулся с такой проблемой, в стеклянной плотно закрытой (еле откупорил) банке довольно длительное время стояла ледяная уксусная кислота, хранилась в холодильнике в темноте, когда достал на дне скопилась темная прозрачная жидкость похожа на яблочный уксус, никаких посторонних запахов, кроме уксусного, вроде не чувствую.

Интересно что это может быть такое? Можно ли использовать ее дальше, например для выделения коллагена из хвостов или лучше сразу все выбросить?

Guest
IP-штамп: frQVZIqPyXv.U
гость

18.09.2009 10:54

URL #2

лучше сразу выбросить. тем более что она в холодильнике стояла в жидком виде, на то и ледяная что при каких то смешных температурах замерзает.

Shadow
Постоянный участник
Минск

19.09.2009 10:27

URL #3

Да, хорошая ледяная уксусная замерзает при +16С, так что если не замерзла в холодильнике, да еще и два слоя... Если есть другая кислота, то эту выкидывайте, ну а если напряг, то просто перегоните. Кипит она 117-118С, более низкокипящие фракции содержат воду.

guest: Fry
IP-штамп: fr/eFUcux3Q2c
гость

22.09.2009 05:08

URL #4

Всем спасибо, перегонять не стал, ибо не знаю что там присутствует кроме нее самой, взял свежую

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