Fantasma4500
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Caffeine breakdown?
not specifically for chemistry purposes, but i have noticed dissolving caffeine in water, including magnesium chloride in a 1:2 ratio usually 2.5g
caffeine and 5g MgCl2 in 500mL water in a polyethylene terepthalate plastic bottle, that the caffeine seems to degrade over time?? a drop of HCl or 2
is added to ensure the MgCl2 doesnt hydrolyze into strong laxatives such as Mg(OH)2 or MgCO3
caffeine is however possibly likely to resist in water accordingly to this PDF
http://las.utalca.cl/EST2005.pdf
so i dont understand quite why the caffeine is going weak, it surely is not about tolerance buildup as a fresh bottle of caffeine solution is a lot
stronger than a old one
it is in the PDF claimed that caffeine is strongly antioxidative, even stronger than ascorbic acid..?
im thinking UV may be possibly main reason for it getting "weaker", others than that there is the plastic it could react with, air, the plastic
bottle, the water, the magnesium chloride and finally the HCl although it sounds lucid that 2 drops of HCl should be able to break down several
grammes of caffeine in heavily diluted solution
any ideas? my best bet is UV, but it isnt getting exposed as much to UV as you would imagine leading to about 50% of the caffeine breaking down
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PlatinumLab
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MgCl2 is a weak lewis acid. I can see how it would interact with caffeine in a number of ways, potentially activating it to attack by water. Just a
hypothesis.
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Fantasma4500
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i do have magnesium chloride and caffeine bottles stored seperately as well, although the magnesium chloride bottle seems to support some sort of odd
cotton wool like organism that keeps growing back, no sugar or similar in it, no smell
i guess ill try testing it stored with and without magnesium chloride
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unionised
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Quote: Originally posted by Antiswat  | not specifically for chemistry purposes, but i have noticed dissolving caffeine in water, including magnesium chloride in a 1:2 ratio usually 2.5g
caffeine and 5g MgCl2 in 500mL water in a polyethylene terepthalate plastic bottle, that the caffeine seems to degrade over time?? a drop of HCl or 2
is added to ensure the MgCl2 doesnt hydrolyze into strong laxatives such as Mg(OH)2 or MgCO3
caffeine is however possibly likely to resist in water accordingly to this PDF
http://las.utalca.cl/EST2005.pdf
so i dont understand quite why the caffeine is going weak, it surely is not about tolerance buildup as a fresh bottle of caffeine solution is a lot
stronger than a old one
it is in the PDF claimed that caffeine is strongly antioxidative, even stronger than ascorbic acid..?
im thinking UV may be possibly main reason for it getting "weaker", others than that there is the plastic it could react with, air, the plastic
bottle, the water, the magnesium chloride and finally the HCl although it sounds lucid that 2 drops of HCl should be able to break down several
grammes of caffeine in heavily diluted solution
any ideas? my best bet is UV, but it isnt getting exposed as much to UV as you would imagine leading to about 50% of the caffeine breaking down
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What makes you think the solution is becoming weak? How do you measure it?
Also, it's the magnesium ions that produce a laxative effect, so the HCl won't affect that.
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Fantasma4500
International Hazard
Posts: 1677
Registered: 12-12-2012
Location: Dysrope (aka europe)
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Mood: dangerously practical
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i wont play games with it, i have first hand felt magnesium sulfate being a stronger laxative than magnesium chloride, and even more -- magnesium
chloride i made myself where some of the product very likely hydrolyzed
however the way we found that the caffeine is "breaking down" is that we simply doesnt get any buzz from it at the same doses, and its not about body
getting used to it, as we can dissolve more and it works wonders once again, not quite sure if i have access to anything to datalogically agree that
the caffeine gets less efficient
one odd thing i found with caffeine however, if you take it without magnesium supplement, both dissolved in water, caffeine alone may take 40 minutes
before you start really feeling it, but its almost instantly with magnesium dissolved in water (as in, an ionic solution)
you may argue that magnesium chloride is poorly bioavailable, although magnesium carbonate shouldnt be more bioavailable, but is a lot stronger
laxative
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