SimpleChemist-238
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mystery reaction (at least for me)
Last night I got around to purifying the ASA I bought at the dollar store and began by stirring and boiling. After 20 min of that I filtered using
paper towels and let the solution sit for a hour. The translucent needle crystals showed there face and I collected them and stored them in a
container made of ABS.
Later that day I wanted to see if I could make yellow chloro-ASA by using 2g of ASA, 50ml of bleach solution (Household) and 1ml of HCl (30%).
I let the reaction mixture do its thing for 12 hours with strong stirring. I awoke the next day to a deep red solution of my mystery compound. Any
idea what it is?
We are chemists , we bring light to the darkness. Knowledge to ignorant, excitement to the depressed and unknowing. we bring crops to broken fields
and water to the desert. Where there is fear we bring curiosity.
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Texium
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Well, I don't know exactly what happened there, but the "needle crystals" that you describe sound a lot more like salicylic acid than ASA, which forms
plate-like crystals. Did you boil it in water? If so, that could have caused it to hydrolyze. Did you notice any scent of acetic acid while you were
boiling it?
Usually, I grind up the tablets and soak them in warm isopropanol, filter, and then let that evaporate. It's slow, but the ASA you get from it is much
more pure.
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Fantasma4500
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heating salicylic acid will turn it into phenol and partially into phenol-salicylic ''stuff'' too, which has a much higher melting point and is
brown-reddish
i dont know if heating ASA could turn it into phenol too, but phenol has a very deep smell like charred wood
IF ASA doesnt turn into smelly compounds when heated abit this could be a rather simple test
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SimpleChemist-238
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I don't think its SA because I know AS and its not what I got at the end of the extraction. I used 150ml of iso alchl to extract the ASA. There is no
way it decarboxilated in my knowledge of its property's. Maybe it reacted with the sodium hypochlorite? What color is chloro ASA?
We are chemists , we bring light to the darkness. Knowledge to ignorant, excitement to the depressed and unknowing. we bring crops to broken fields
and water to the desert. Where there is fear we bring curiosity.
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aga
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Could someone please say what ASA is ?
Acetyl salicylic acid ?
This beginnings, and as beginner, i confused.
Edit :
Changd it make me sound les of an inglish spoker.
[Edited on 3-5-2015 by aga]
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szuko03
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It's aspirin by common name (99.9% sure)
Chemistry is a natural drive, not an interest.
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aga
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OK. ASA is Aspirin.
So it is acetylsalycilic acid.
Thanks, less confused now.
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Volanschemia
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Haha, don't worry aga, I hate acronyms for compound names as well.
"The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and
vapor, soot and flame, poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the
Persian king" - Johann Joachim Becher, 1635 to 1682.
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IrC
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Proper procedure when one begins a thread immediately tossing acronyms into the mix should be at least define them once. It can be understood no one
wishes to write acetylsalycilic acid a dozen times and in cases like this the first use ought to be acetylsalycilic acid (ASA), or even Aspirin (ASA)
in this case is acceptable. From then on ASA would be immediately known and spare ten thousand visitors each having to do a web search because they
did not wish to appear ignorant and ask. In my opinion this is poor posting to assume everyone knows or should know what you meant by the acronym. If
one considers millions of possible organic chemicals alone there could be many which fit the identical acronym and over time these things along with
the language itself change. Why create confusion?
"Science is the belief in the ignorance of the experts" Richard Feynman
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aga
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In my state, i do not care if i appear ignorant when i am in fact ingnorant.
Thankfully the answer was given, augmenting my norance of the genre.
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IrC
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Many however, especially younger, still worry about 'status' and do not ask. It saves many from searching if a procedure of giving explanation when
each acronym is first introduced in a thread. Also saves confusion and possibly mistakes, especially important in chemistry. As an exaggerated example
say someone here posts a thread on making Cinnamon suckers. Later we learn some 14 year old read CO and expired bubbling monoxide in the syrup instead
of adding Cinnamon Oil. I know, ridiculous example but it makes the point. Explaining acronyms when introduced should be proper conduct for all
threads. Just my opinion but there it is.
"Science is the belief in the ignorance of the experts" Richard Feynman
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blogfast25
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Or call it 'MindreadersMadness'...
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