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Offlinenoobhead
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Isopropyl Alcohol 100%
    #18433126 - 06/17/13 05:54 PM (10 years, 7 months ago)

He guys,

I already have been reading a lot of stuff on this site, but can't really find a discussion about isopropyl alcohol 100%.

I did found a complete guide for cleaning and sanitation, which stated:
''Isopropyl alcohol is the most effective sanitizer of the commonly available alcohols''.

It is easy for me to find 5 litres of the 100%, but if 70% works better I want to know why, and what should the other 30% be?

~Bastiaan.


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InvisibleThe Phleg
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Re: Isopropyl Alcohol 100% [Re: noobhead]
    #18433134 - 06/17/13 05:57 PM (10 years, 7 months ago)

Uhhhh... What are you doing?

Sanitizing? If so, 70% is just fine.


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InvisibleCyclohexylamine
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Re: Isopropyl Alcohol 100% [Re: noobhead] * 1
    #18433137 - 06/17/13 05:57 PM (10 years, 7 months ago)

Alcohol can never be 100% - even the rubbing alcohol bottles which say so are actually ~97%.
The rest of it is water. (The same with the 70% - eg. 70% denatured alcohol, 30% water).


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Re: Isopropyl Alcohol 100% [Re: noobhead]
    #18433146 - 06/17/13 05:59 PM (10 years, 7 months ago)

70% works better because it's less volatile, therefore taking longer to evaporate, and ultimately sanitizing for a longer period of time.  The non-ISO percentage is water.


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InvisibleMush 4 Brains
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Re: Isopropyl Alcohol 100% [Re: noobhead]
    #18433155 - 06/17/13 06:01 PM (10 years, 7 months ago)

Quote:

It is easy for me to find 5 litres of the 100%, but if 70% works better I want to know why, and what should the other 30% be?



70% is better because it doesn't evaporate as quick as the 100%.  It sticks around a little longer allowing for a more thorough disinfection.

If you want to dilute the 100% iso, use distilled water.


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Invisiblepwnasaurus
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Re: Isopropyl Alcohol 100% [Re: Cyclohexylamine]
    #18433166 - 06/17/13 06:04 PM (10 years, 7 months ago)

Quote:

tymoteusz3 said:
Alcohol can never be 100% - even the rubbing alcohol bottles which say so are actually ~97%.
The rest of it is water. (The same with the 70% - eg. 70% denatured alcohol, 30% water).



I've never seen 100% - at least here, they are labelled 97%.  I'm sure you know that though :smile:


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InvisibleThe Phleg
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Re: Isopropyl Alcohol 100% [Re: pwnasaurus]
    #18433182 - 06/17/13 06:09 PM (10 years, 7 months ago)

The reason 100% doesn't exist (commonly) is because it is hygroscopic. At 100%, it will begin pulling moisture (h20) out of the air and into the alcohol, lowering the %.


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Invisiblepwnasaurus
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Re: Isopropyl Alcohol 100% [Re: The Phleg]
    #18433185 - 06/17/13 06:10 PM (10 years, 7 months ago)

I'm aware.


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InvisibleThe Phleg
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Re: Isopropyl Alcohol 100% [Re: pwnasaurus]
    #18433196 - 06/17/13 06:11 PM (10 years, 7 months ago)

:thisfuckinguy:


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InvisibleLegend
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Re: Isopropyl Alcohol 100% [Re: pwnasaurus]
    #18433199 - 06/17/13 06:13 PM (10 years, 7 months ago)

OP even if you need it as a solvent, 70% should work fine.

if you are using it as a solvent, then there might be something more efficient than iso.


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Re: Isopropyl Alcohol 100% [Re: Legend]
    #18433202 - 06/17/13 06:13 PM (10 years, 7 months ago)

I would never use 70% as a solvent.


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InvisibleLegend
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Re: Isopropyl Alcohol 100% [Re: pwnasaurus]
    #18433211 - 06/17/13 06:16 PM (10 years, 7 months ago)

depends what you're working with


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InvisibleRobo
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Re: Isopropyl Alcohol 100% [Re: pwnasaurus]
    #18433462 - 06/17/13 07:11 PM (10 years, 7 months ago)

Quote:

pwnasaurus said:
Quote:

tymoteusz3 said:
Alcohol can never be 100% - even the rubbing alcohol bottles which say so are actually ~97%.
The rest of it is water. (The same with the 70% - eg. 70% denatured alcohol, 30% water).



I've never seen 100% - at least here, they are labelled 97%.  I'm sure you know that though :smile:




I think it technically can be, but that's the limit for simple distillation.


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InvisibleSophistic Radiance
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Re: Isopropyl Alcohol 100% [Re: Robo]
    #18433471 - 06/17/13 07:14 PM (10 years, 7 months ago)



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Offlinem47
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Re: Isopropyl Alcohol 100% [Re: Robo]
    #18433472 - 06/17/13 07:14 PM (10 years, 7 months ago)

I have a bottle that says 99%. Its gotta be real, the bottle says so.


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Offlinenoobhead
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Re: Isopropyl Alcohol 100% [Re: m47]
    #18435487 - 06/18/13 04:45 AM (10 years, 7 months ago)

It is for extraction of psylocibin of b+ shrooms, i forgot to mension, Sorry.


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Offliner00tuuu123
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Re: Isopropyl Alcohol 100% [Re: noobhead] * 1
    #18435546 - 06/18/13 05:24 AM (10 years, 7 months ago)

Quote:

noobhead said:
It is for extraction of psylocibin of b+ shrooms, i forgot to mension, Sorry.



Why not use grain the alcohol percentage should be high enough and for consumption should be much safer. If I remember correctly Everclear is 95%


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OfflineSoulidarity
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Re: Isopropyl Alcohol 100% [Re: r00tuuu123] * 1
    #18435643 - 06/18/13 06:20 AM (10 years, 7 months ago)

who cares what %, the main thing is that you can catch a buzz from it


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Offlinehidenseek1
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Re: Isopropyl Alcohol 100% [Re: m47]
    #18435751 - 06/18/13 07:38 AM (10 years, 7 months ago)

Quote:

m47 said:
I have a bottle that says 99%. Its gotta be real, the bottle says so.




from what ive read on this site, it is 99% , well untill you open the bottle


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Offlinenoobhead
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Re: Isopropyl Alcohol 100% [Re: hidenseek1]
    #18436007 - 06/18/13 09:42 AM (10 years, 7 months ago)

From what I've understand it doesn't matter if you use methanol, ethanol, isopropanol or some other chemical substance, as long as it all evaporates, the pellet should be clean and pure psylocibine?

And I found this one http://www.farmaline.nl/drogisterij/bestellen/fagron-isopropyl-alcohol-5/ which states 100% but im indeed pretty sure it will be around 99,7%, and if the bottle becomes emptyer the percentage will drop rapidly.

Further on everclear is something ive never heard of in the netherlands so i probably wont be able to get it.

Still I just want to know if it is possible, and a good idea to extract with isopropyl alcohol, and if so 70% or 100%.

Thx


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Invisiblepsi
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Re: Isopropyl Alcohol 100% [Re: noobhead]
    #18436017 - 06/18/13 09:46 AM (10 years, 7 months ago)

Yeah, I'd feel pretty safe about consuming something extracted with isopropyl alcohol. It evaporates readily, and it's easy to smell if any remains.


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Offlinenoobhead
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Re: Isopropyl Alcohol 100% [Re: psi]
    #18436037 - 06/18/13 09:53 AM (10 years, 7 months ago)

Thanks :grin:


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Offlinehidenseek1
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Re: Isopropyl Alcohol 100% [Re: noobhead]
    #18436634 - 06/18/13 12:15 PM (10 years, 7 months ago)

id go with the 100% unless the price is radically more than the 70%

you should be fine with iso , but test other chemicals you might use instead by placeing some on some glass/petri dish or ect and evaporating and see if there is any left over residue, if there isnt, its good to go, as far as i know, i just read this stuff, ive only ever used alcohol, and only used that once


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Offlineportalbello
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Can I dilute 100% ISO alcohol with water to receive 70% ISO alcohol [Re: Mush 4 Brains] * 1
    #28628065 - 01/20/24 02:54 AM (8 days, 12 hours ago)

Hello, thank you for this reply.
I need advice, if I have only 99% ISO alcohol and can't get 70%, can I just dilute it with water, as you said? Can I just pour 700 ml of 99% ISO alcohol and 300 ml of water into spray bottle and receive the same, like from store, 1 liter of 70% ISO alcohol? And if so, can I use tap water, or it must be distilled water, and why?


Edited by portalbello (01/20/24 02:56 AM)


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OfflineJanus62
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Re: Can I dilute 100% ISO alcohol with water to receive 70% ISO alcohol [Re: portalbello]
    #28628079 - 01/20/24 03:29 AM (8 days, 11 hours ago)

Wow - this thread's ancient!

Yes, you can.  As said above, 70% works better because it stays wet longer (hence the WHO recipe for sanitiser during Covid).

You can absolutely dilute it - I do as I could only find 99.9%.  I use water from the tap.


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Invisiblekoraks
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Re: Can I dilute 100% ISO alcohol with water to receive 70% ISO alcohol [Re: portalbello]
    #28628091 - 01/20/24 04:27 AM (8 days, 10 hours ago)

Quote:

portalbello said:
Can I just pour 700 ml of 99% ISO alcohol and 300 ml of water into spray bottle and receive the same, like from store, 1 liter of 70% ISO alcohol? And if so, can I use tap water, or it must be distilled water, and why?



Yes, you can dilute down to whatever percentage you need.

What you dilute with, depends on the purpose you have in mind. For the vast majority of applications, tap water will be fine.

Btw, the reason why ethanol (so not IPA) generally comes as a 96% is because this is a stable azeotrope. Drying it up to 100% is hella energy intensive (=expensive), in practice generally not worth it, and as remarked earlier it'll just absorb atmospheric water until it's back to 96% again. For isopropyl alcohol, the azeotrope is 91% v/v. 100% IPA will therefore be significantly more expensive than any concentration up to 91% since the latter can be made with normal distillation processes, while anything from 91% upwards needs to be produced with an azeotropic distillation setup that involves the use of additional solvents, equipment and tightly controlled process conditions.


Edited by koraks (01/20/24 04:32 AM)


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Onlinekoods
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Re: Isopropyl Alcohol 100% [Re: Cyclohexylamine]
    #28628097 - 01/20/24 04:54 AM (8 days, 10 hours ago)

Quote:

Cyclohexylamine said:
Alcohol can never be 100% - even the rubbing alcohol bottles which say so are actually ~97%.
The rest of it is water. (The same with the 70% - eg. 70% denatured alcohol, 30% water).



That not true. Those are the maximum concentrations of you use distillation. There are other methods to remove the excess water chemically. 100% ethanol is produced using a third solvent, sometimes benzene. Never consume lab grade 100% ethanol (absolute ethanol).


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OfflineNorthernerM
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Re: Isopropyl Alcohol 100% [Re: koods]
    #28628802 - 01/20/24 04:26 PM (7 days, 22 hours ago)

I read somewhere of lab students being killed by drinking absolute ethanol.


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Re: Isopropyl Alcohol 100% [Re: Northerner]
    #28628838 - 01/20/24 04:47 PM (7 days, 22 hours ago)

I think it was much more likely to be contaminated with benzene a few decades ago. It’s also possible people drink denatured ethanol that contains methanol. Uncontaminated 100% ethanol can be very irritating to mucus membranes.


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OfflineNorthernerM
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Re: Isopropyl Alcohol 100% [Re: koods]
    #28628852 - 01/20/24 04:53 PM (7 days, 22 hours ago)

Yeah, it was literally 30+ years ago i read that when I was a student. Makes sense.


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OfflinePatlal
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Re: Isopropyl Alcohol 100% [Re: noobhead] * 1
    #28628886 - 01/20/24 05:08 PM (7 days, 22 hours ago)

Ok since all the answers are wrong about the alcohol being less effective I might as well explain.

Alcohol disinfects because it destroys cells by entering it.

In order to get inside the cell it must convince the cell to open it's membrane. Or fool it.

70% alcohol 30% water will fool the cell membrane to open up because it sees water and doesn't realize the alcohol is mixed in and therefore poisons itself.  So 30% water is enough for the cell to "drink' it.

The cell will not open up to 100% alcohol because it has no reason to. No water, no entry. If cells membranes let anything in all the time, life would probably not exist.  In a world where cell do let in everything and survive, we would be immuned to everything. We would be unpoisonable and uninfectable.


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Edited by Patlal (01/20/24 05:16 PM)


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Invisiblenooneman
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Re: Isopropyl Alcohol 100% [Re: noobhead] * 1
    #28629084 - 01/20/24 07:10 PM (7 days, 20 hours ago)

Old thread, but wanted to add a couple things:

Isopropyl alcohol is highly flammable, keep away from any flames. The vapors are flammable, so be aware of the danger even if you're applying it to a surface.

It doesn't do a better job at sanitizing things than soap and water.

It's a bit toxic so you don't want to be dealing with a bunch of it all the time.


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Onlinekoods
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Re: Isopropyl Alcohol 100% [Re: Patlal] * 1
    #28629086 - 01/20/24 07:14 PM (7 days, 19 hours ago)

That’s not what’s happening. Alcohol denatures many types of proteins, meaning it causes proteins to fall apart and lose their structure. Alcohols essentially dissolve vital parts of bacteria and viruses.


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InvisiblePatrickKn
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Re: Isopropyl Alcohol 100% [Re: nooneman]
    #28629100 - 01/20/24 07:35 PM (7 days, 19 hours ago)

Quote:

nooneman said:
It doesn't do a better job at sanitizing things than soap and water.




:philososloth:


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Invisiblekoraks
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Re: Isopropyl Alcohol 100% [Re: Patlal] * 1
    #28629356 - 01/21/24 01:36 AM (7 days, 13 hours ago)

Quote:

Patlal said:

In order to get inside the cell it must convince the cell to open it's membrane. Or fool it.





LOL you make it sound like cells have little gnomes standing guards at the outside of the cell wall telling chemicals to piss off.

In reality, cell membranes become more permeable due to the effects of solvents like alcohol. This is widely documented and well understood and has fuck all to do with "fooling" the cell showing it some water or any of that fairytale bullshit.


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