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josbos
Registered: 02/16/20 
Posts: 134
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70% ISO or Regular 70% ?
#26494383 - 02/20/20 03:49 AM (3 years, 11 months ago) |
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Hi friends,
this is the second time i post this, the first post some how got deleted. any way i want to know why it is necessary to use 70% ISO. Because a friend of mine got a distill and he can make regular 92% alcohol. so if he reduces the 92% to 70% can that alcohol be used? or has it to be ISO Alcohol ?
Thanks for the information guys
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antmanmax
Padawan



Registered: 03/22/19
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Re: 70% ISO or Regular 70% ? [Re: josbos] 2
#26494387 - 02/20/20 03:54 AM (3 years, 11 months ago) |
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70% is more effective for sanitizing as it penetrates cell walls easier than 90%+
As far as the type, it doesn't matter much. Ethanol is a bit more flammable, and is a bit better than isopropyl for sanitizing. But only a bit.
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notdave
Stranger

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Re: 70% ISO or Regular 70% ? [Re: josbos]
#26494390 - 02/20/20 04:04 AM (3 years, 11 months ago) |
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Ethanol has a lower latent heat of vaporisation so isn't as good at drying (at 70%) anyway. 70% Ethanol would leave water behind for significantly longer.
You might have to use a different concentration of ethanolto achieve the same effect. I have no idea how to calculate that though.
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josbos
Registered: 02/16/20 
Posts: 134
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Re: 70% ISO or Regular 70% ? [Re: antmanmax]
#26494394 - 02/20/20 04:09 AM (3 years, 11 months ago) |
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Quote:
antmanmax said: 70% is more effective for sanitizing as it penetrates cell walls easier than 90%+
As far as the type, it doesn't matter much. Ethanol is a bit more flammable, and is a bit better than isopropyl for sanitizing. But only a bit.
thanks for the information, about that the type of alcohol does not matter. thats what i needed to know, as for 70% or 90% ¨so if he reduces the 92% to 70% ¨ yeah i have read many times that 70% is better because of the cell walls and because 90% evaporated quicker.
Thank you for the information
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josbos
Registered: 02/16/20 
Posts: 134
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Re: 70% ISO or Regular 70% ? [Re: notdave]
#26494401 - 02/20/20 04:28 AM (3 years, 11 months ago) |
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Quote:
notdave said: Ethanol has a lower latent heat of vaporisation so isn't as good at drying (at 70%) anyway. 70% Ethanol would leave water behind for significantly longer.
You might have to use a different concentration of ethanolto achieve the same effect. I have no idea how to calculate that though.
Thanks for you information, this is really helpful information. i will register at a university-degree chemistry forum. and post this question.
thanks
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antmanmax
Padawan



Registered: 03/22/19
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Re: 70% ISO or Regular 70% ? [Re: notdave]
#26494424 - 02/20/20 04:59 AM (3 years, 11 months ago) |
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Quote:
notdave said: Ethanol has a lower latent heat of vaporisation so isn't as good at drying (at 70%) anyway. 70% Ethanol would leave water behind for significantly longer.
You might have to use a different concentration of ethanolto achieve the same effect. I have no idea how to calculate that though.
Isn't that a good thing, though? You want whatever you're sanitizing to remain hydrated, so the alcohol can do its job. If it evaporates too quickly it won't sanitize as well.
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notdave
Stranger

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Re: 70% ISO or Regular 70% ? [Re: antmanmax]
#26494429 - 02/20/20 05:24 AM (3 years, 11 months ago) |
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Not 100% sure, but i think ethanol of a certain concentration will leave water behind rather than helping it evaporate like with IPA. Pretty sure there's a good reason IPA is used for this sort of thing rather than ethanol, just not sure what it is!
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SynKyd
ctrl-alt-delite



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Re: 70% ISO or Regular 70% ? [Re: notdave] 1
#26494540 - 02/20/20 07:18 AM (3 years, 11 months ago) |
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Higher concentration iso evaps quicker and has less time to sanitize that’s why people recommend 70.
Not sure about ethanol.......
-------------------- New inclusive poop emojis from Apple!
   
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InfiniteDreams


Registered: 10/25/19
Posts: 1,224
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Re: 70% ISO or Regular 70% ? [Re: SynKyd]
#26494669 - 02/20/20 08:36 AM (3 years, 11 months ago) |
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ACKSHUALLY
Quote:
bodhisatta said: For iso and ethanol
70% kills better It has the right osmotic pressure and tonicity to penetrate cells and denature their insides. It may denature surface proteins on cell walls and bacterial envelopes but not to the extent higher percentage alcohol(both iso and ethanol) will. Alcohol is able to permeate cells and then go to work on intracellular components
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antmanmax
Padawan



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Re: 70% ISO or Regular 70% ? [Re: notdave]
#26495563 - 02/20/20 04:16 PM (3 years, 11 months ago) |
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Quote:
notdave said: Not 100% sure, but i think ethanol of a certain concentration will leave water behind rather than helping it evaporate like with IPA. Pretty sure there's a good reason IPA is used for this sort of thing rather than ethanol, just not sure what it is!
Labs use 70% ethanol as well.
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bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,890
Loc: Milky way
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Re: 70% ISO or Regular 70% ? [Re: SynKyd]
#26495602 - 02/20/20 04:42 PM (3 years, 11 months ago) |
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Quote:
SinysterKyd said: Higher concentration iso evaps quicker and has less time to sanitize that’s why people recommend 70.
Not sure about ethanol.......
That's only a minor secondary benefit of the fact that 70% actually kills better.
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SynKyd
ctrl-alt-delite



Registered: 09/27/13
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Re: 70% ISO or Regular 70% ? [Re: bodhisatta]
#26495677 - 02/20/20 05:19 PM (3 years, 11 months ago) |
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Quote:
bodhisatta said:
Quote:
SinysterKyd said: Higher concentration iso evaps quicker and has less time to sanitize that’s why people recommend 70.
Not sure about ethanol.......
That's only a minor secondary benefit of the fact that 70% actually kills better.
Thanks Bod for clarifying.......I just went looking for where I read this long ago.
It was your agar tek
Quote:
bodhisatta said:
did you know 70% alcohol sanitizes better than 90+ or higher concentrations more info about that here
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Nichrome
I'm a torso!



Registered: 12/17/18
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Re: 70% ISO or Regular 70% ? [Re: SynKyd]
#26495945 - 02/20/20 07:36 PM (3 years, 11 months ago) |
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I only use ethanol and have not used iso in 20 years....
-------------------- “Better to be deprived of food for three days, than tea for one.”
Freedom is not the right to do as you please, but the liberty to do as you should. ~Emerson
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InfiniteDreams


Registered: 10/25/19
Posts: 1,224
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Re: 70% ISO or Regular 70% ? [Re: Nichrome] 1
#26495955 - 02/20/20 07:43 PM (3 years, 11 months ago) |
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ISo is super cheap, effective, and everywhere has it.
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gizmo1



Registered: 06/15/11
Posts: 3,831
Loc: FREEDOM
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I use the heads off my still and mix it with my iso. Idk what concentration I'm getting and of what but it's seems to work just. Maybe the last year I've been using it.
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Sir Pentinite
Stranger all the time.

Registered: 05/15/19
Posts: 525
Loc: ation Location Location
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Re: 70% ISO or Regular 70% ? [Re: notdave]
#26496043 - 02/20/20 08:42 PM (3 years, 11 months ago) |
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Quote:
notdave said: Pretty sure there's a good reason IPA is used for this sort of thing rather than ethanol, just not sure what it is!
There are a couple reasons. Iso is cheaper and widely available. Ethanol that hasn't been denatured is subject to liquor tax and the laws surrounding its production, distribution, and sale. Ethanol is usually denatured with methanol which is more toxic and noxious than either of the other two alcohols.
I've made up to 88% ethanol before, but the effort and time made it too precious to go spraying on tabletops. It was much more fun to drink it with friends who thought they were gonna die after swallowing it.
-------------------- "I thought to myself 'Boy, I'm sure glad there's nobody here to see this because this is exactly the sort of thing that gets people riled-up and they assume you're dying and that something has to be done. Where if you're alone, you know, you either come through it or you die, but in any case you avoid the fuss.'" - Terrence McKenna
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josbos
Registered: 02/16/20 
Posts: 134
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Quote:
Sir Pentinite said:
Quote:
notdave said: Pretty sure there's a good reason IPA is used for this sort of thing rather than ethanol, just not sure what it is!
There are a couple reasons. Iso is cheaper and widely available. Ethanol that hasn't been denatured is subject to liquor tax and the laws surrounding its production, distribution, and sale. Ethanol is usually denatured with methanol which is more toxic and noxious than either of the other two alcohols.
I've made up to 88% ethanol before, but the effort and time made it too precious to go spraying on tabletops. It was much more fun to drink it with friends who thought they were gonna die after swallowing it. 
i dont drink thats way i take mushrooms and harmala. so for me is no problem to ask my friend for 70% ethanol
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josbos
Registered: 02/16/20 
Posts: 134
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Quote:
InfiniteDreams said: ISo is super cheap, effective, and everywhere has it.
yeah but iso also got alot of carcinogenic stuff in it
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josbos
Registered: 02/16/20 
Posts: 134
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Re: 70% ISO or Regular 70% ? [Re: antmanmax]
#26496704 - 02/21/20 09:31 AM (3 years, 11 months ago) |
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Quote:
antmanmax said:
Quote:
notdave said: Not 100% sure, but i think ethanol of a certain concentration will leave water behind rather than helping it evaporate like with IPA. Pretty sure there's a good reason IPA is used for this sort of thing rather than ethanol, just not sure what it is!
Labs use 70% ethanol as well.
that say alot, i have the feeling that those guy in the lab know what there doing. but i could be wrong
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josbos
Registered: 02/16/20 
Posts: 134
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Re: 70% ISO or Regular 70% ? [Re: Nichrome]
#26496719 - 02/21/20 09:38 AM (3 years, 11 months ago) |
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Quote:
Nichrome said: I only use ethanol and have not used iso in 20 years....
i bet you know what your doing. 20 years is a long time. if ethanol was not working than you wont use it. 20 years of knowledge. thanks for your in put
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