Vic | 19/01/2021 15:54:14 |
2736 forum posts 1 photos | 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 290 photos | 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? pgk |
SillyOldDuffer | 19/01/2021 16:30:06 |
Moderator 6878 forum posts 1539 photos | 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.) Dave |
duncan webster | 19/01/2021 16:40:34 |
![]() 3069 forum posts 40 photos | 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 |
Ady1 | 19/01/2021 16:41:50 |
![]() 4235 forum posts 593 photos | Once you add some irn bru there's no real difference |
not done it yet | 19/01/2021 20:16:58 |
5628 forum posts 20 photos | 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 787 photos | Realistically priced, high quality Isopropyl Alcohol is available here: https://www.ebay.co.uk/itm/IPA-99-9-1-LITRE-Lab-Grade-Isopropyl-Alcohol-Isopropanol-1L/141522873981 Well packed and promptly despatched too MichaelG. |
Robert Atkinson 2 | 19/01/2021 22:02:26 |
![]() 904 forum posts 17 photos | 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. https://ethanol.co.uk/products/industrial-denatured-alcohol-ida/ https://ethanol.co.uk/products/industrial-denatured-alcohol-ida/ "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. Rober G8RPI.
Edited By Robert Atkinson 2 on 19/01/2021 22:04:47 |
Pete Rimmer | 19/01/2021 22:13:45 |
915 forum posts 56 photos | Posted by Michael Gilligan on 19/01/2021 20:34:06:
Realistically priced, high quality Isopropyl Alcohol is available here: https://www.ebay.co.uk/itm/IPA-99-9-1-LITRE-Lab-Grade-Isopropyl-Alcohol-Isopropanol-1L/141522873981 Well packed and promptly despatched too MichaelG. No it ain't This item is out of stock |
Michael Gilligan | 19/01/2021 23:02:39 |
![]() 17333 forum posts 787 photos | 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 ]
MichaelG. . https://hexchemonline.co.uk/collections/isopropyl-alcohol/products/ipa?variant=52047319942 Edited By Michael Gilligan on 19/01/2021 23:03:43 |
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.