|2736 forum posts|
Anyone on here know the difference between 99.5% IDA (Ethanol?) and 99 or 100% Isopropyl Alcohol? Apart from the obvious .5%
|pgk pgk||19/01/2021 16:07:06|
|2060 forum posts|
I believe the answer is that IPA is 'loosly' Propanol whereas IDA is Ethanol + some varant of nasty to make it unsuitable for drinking - usually methanol.
So a bit like butane v propane - similar properties but more combustible carbon?
6878 forum posts
Same answer as pgk, except IDA is industrial meths, a mix of ethanol and 5% naptha. I think 99.5% IDA is industrial meths (95/5% mix) diluted with a dash of water, not 99.5% ethanol. It's controlled because Ethanol is a recreational drug only sold under licence with much tax added!
Isopropyl Alcohol is a different alcohol with unpleasant side effects.
IDA is cheap and is widely used as a fuel or unfussy solvent - where the naptha doesn't matter.
Propanol is mainly used when a pure alcohol is needed as a solvent for medical, cosmetics, ink and such. Meths works just as well except it stinks or spoils some things! Propanol is a good fuel but is rarely used because of the cost. (It can be added to petrol as an anti-knock agent.)
|duncan webster||19/01/2021 16:40:34|
3069 forum posts
IPA is no good for firing your Mamod, took me ages to get the soot off
Edited By duncan webster on 19/01/2021 16:41:14
4235 forum posts
Once you add some irn bru there's no real difference
|not done it yet||19/01/2021 20:16:58|
|5628 forum posts|
IDA is normally denatured ethyl alcohol at about 95% pure - the rest being the denaturing chemical (often methyl alcohol plus a bittering agent - if appropriate) and water. The water is there because the ethanol is generally distilled and 95.5% is about the best one can manage by that means ( theoretical is 95.7%, IIRC).
Absolute ethanol is either produced by other means or chemically dried - hence is very expensive.
|Michael Gilligan||19/01/2021 20:34:06|
17333 forum posts
Realistically priced, high quality Isopropyl Alcohol is available here:
Well packed and promptly despatched too
|Robert Atkinson 2||19/01/2021 22:02:26|
904 forum posts
IDA is Ethanol with at least 5% wood Naptha / Meatanol or simialr.
95% IDA is 95% IDA + 5% water i.e roughly 86% ethanol, 4% Wood Napha, 5% water.
99.5% has a small quantity of water, probably through absorbtion from the atmosphere (they can't prove it's 100%)
Note that in the UK you need authorisation from HMRC to buy or keep IDA. There is a 20l per year limit for members of the public for hobby use this still needs HMRC authorisation.
"Meths" is completly denatured alcohol - CDA no restriction on purchase in UK. It used to be dyed purple but that requirement was dropped in 2013.
Edited By Robert Atkinson 2 on 19/01/2021 22:04:47
|Pete Rimmer||19/01/2021 22:13:45|
|915 forum posts|
No it ain't
This item is out of stock
|Michael Gilligan||19/01/2021 23:02:39|
17333 forum posts
I’m sure they will make some more soon, Pete
Actually ... I suspect they are about to revise the ebay price
[ it appears to fluctuate with demand ]
Edited By Michael Gilligan on 19/01/2021 23:03:43
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