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Invisibleohmatic
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transporting h2o2 through water vapor ?
    #4021173 - 04/06/05 12:43 PM (12 years, 7 months ago)

ey!

if i got a jar with a 3% h2o2 water mixture with a bubbler submerged and a
hose leading to the outside, would the humid air leaving the jar
also carry some percentage of h2o2 in it?

b/c the water/h2o2 mix evaps it would make sense that some of h2o2 gets evaporated aswell.

for people who cant visualise what im talking bout:

peace ohm :mushroom2:


--------------------
:penis: MONOTUB tek :sun: HEATBOMB tek :penis:

RIP #cultivation! ....can't associate? well FUCK U !


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Offlinescatmanrav
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Re: transporting h2o2 through water vapor ? [Re: ohmatic]
    #4021202 - 04/06/05 12:50 PM (12 years, 7 months ago)

I'm fairly sure that it would be broken down, before it evaporated. If you put it with an ultrasonic, or an impeller type cool mist that actually throws bits of water in the air, it may... I'm pretty sure that h202 cant just evoporate into the air though..the fresh air bubbling into it (especially since the container is clear, light breaking it down too) probably causes the O to leave...


--------------------
"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


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OfflineAeolus1369
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Re: transporting h2o2 through water vapor ? [Re: scatmanrav]
    #4021706 - 04/06/05 03:13 PM (12 years, 7 months ago)

Actually I'm pretty sure the H2O2 will evaporate into the air along with the water. The vapor pressure of H202 at 30C (around 85F) is 23.3 compared with water's 31.8 so the rates would be similar (water evaporating a bit faster).

But yea, the light doesn't help anything, nor does the presence of metal which reduces the H202. Check out this link from a simple "MSDS hydrogen peroxide" google search: http://www.bu.edu/es/labsafety/ESMSDSs/MSHydPeroxide.html#anchor890962

Quote:

Conditions to Avoid: Incompatible materials, light, metals, excess heat, combustible materials, reducing agents, alkaline materials, strong oxidants.

Incompatibilities with Other Materials: Acids, bases, brass, copper, bronze, chromium trioxide, iron, lead, silver, zinc."




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Invisibleohmatic
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Re: transporting h2o2 through water vapor ? [Re: Aeolus1369]
    #4041308 - 04/11/05 04:00 PM (12 years, 7 months ago)

so, id love some additional input.

what if i put the h2o2/water mix in a black airtight and 'light tight' pvc
container?

basically the question is, will the water vaport carry h2o2 or not.
peace ohm :mushroom2:


--------------------
:penis: MONOTUB tek :sun: HEATBOMB tek :penis:

RIP #cultivation! ....can't associate? well FUCK U !


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OfflineAeolus1369
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Re: transporting h2o2 through water vapor ? [Re: ohmatic]
    #4041493 - 04/11/05 04:58 PM (12 years, 7 months ago)

Yep, pretty sure it would...sounds like a great way to keep the inside of a terrarium sterile-er actually  :smile2:


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OfflinekronnyQ
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Re: transporting h2o2 through water vapor ? [Re: Aeolus1369]
    #4041593 - 04/11/05 05:25 PM (12 years, 7 months ago)

It's not going to do ANYTHING for contams.

When H2O2 is evaporated, it breaks down into water and oxygen.

I've made a bubbler with lime water, someone on here came up with it. Thats what you wanna do.


Edited by kronnyQ (04/11/05 05:28 PM)


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OfflineAeolus1369
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Re: transporting h2o2 through water vapor ? [Re: kronnyQ]
    #4046005 - 04/12/05 03:20 PM (12 years, 7 months ago)

ok, I'll concede that the concentration may never get high enough to help with contams, but I'm still convinced that H2O2 can exist in a vapor state before breaking down into water and oxygen.

Why else would MSDS cite a boiling point and vapor pressure? And the fact that you can smell H2O2 is proof enough. Maybe if a higher percent solution of H2O2 could be obtained, it could be vaporized to useful concentrations.

What's the lime water bubbler do (absorb C02 and keep the water sterile)?


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OfflineMonkeyPod
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Re: transporting h2o2 through water vapor ? [Re: Aeolus1369]
    #4048696 - 04/13/05 03:13 AM (12 years, 7 months ago)

Has anyone been able to find the lime water bubbler thread? I'm curious to see what it's all about. I did a search for "lime water" and nothing came up. I found a thread outlining how to test for the presence of CO2 using "limewater" but that's not what your talking about.


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OfflinekronnyQ
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Re: transporting h2o2 through water vapor ? [Re: MonkeyPod]
    #4048742 - 04/13/05 03:29 AM (12 years, 7 months ago)

Nope doesn't absorb CO2 but contams hate lime and it's not gunna break down like H2O2.

Just put a few teaspoons in your bubbler.


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Offlinescatmanrav
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Re: transporting h2o2 through water vapor ? [Re: kronnyQ]
    #4049483 - 04/13/05 10:02 AM (12 years, 7 months ago)

>And the fact that you can smell H2O2 is proof enough.

Funny, according to that site you posted (click the link and its the table right above where it takes you on the page) H202 is oderless.

I googled around for a bit. I found that hydrogen peroxide vapor can exist according to:
http://www.atsdr.cdc.gov/MHMI/mmg174.pdf

However, whether you'll create it there or not, is another story. The thing is, if you notice, the page mentions the boiling point of h202, 286 degrees, 74 degrees? higher then the boiling point of water. That makes me think its going to evaporate much less easily, and that makes me think that it will break down readily before it evaporates. Again, this is just some basic knowledge from google put to my head and conclusions drawn...I may not be correct, just hypothesising.

I get the feeling from my reading though that vapors and mists can be created with higher concentrations...I just dont see 3% not breaking down completly before becoming a mist. Unless someone else gives me some new knowledge :smile:


--------------------
"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


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OfflineAeolus1369
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Re: transporting h2o2 through water vapor ? [Re: scatmanrav]
    #4049764 - 04/13/05 12:18 PM (12 years, 7 months ago)

>I just dont see 3% not breaking down completly before becoming a mist.

Seems like this could be tested fairly easily.  Maybe streak two agar plates with a bacteria that's sensitive to H202 and incubate one in a chamber humidified with just plain water and the other with H202.  If the one in H202 does worse, then there's your answer.  If it doesn't well either all the H202 is breaking down, or it just doesn't get to high enough concentrations to make a difference (which is what we really care about when it comes down to it right?  :smile:)

...and I could've sworn I could smell 3% H202 last time I worked with it  :wink:


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OfflineX24
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Re: transporting h2o2 through water vapor ? [Re: Aeolus1369]
    #4049787 - 04/13/05 12:27 PM (12 years, 7 months ago)

ive painted my ultrasonic humidifier to block out the light and put a good amount of h2o2 in it along with h20. i can smell the h202 in the mist and im gonna have to believe that it does get into the air.


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X II IV


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Offlinescatmanrav
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Re: transporting h2o2 through water vapor ? [Re: Aeolus1369]
    #4049788 - 04/13/05 12:27 PM (12 years, 7 months ago)

>..and I could've sworn I could smell 3% H202 last time I worked with it

I could too...but doesnt that tell you something about that page?

Hey man, if its so easy, feel free to do it. I dont have the ability or desire to do that test :smile:


--------------------
"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


Post Extras: Print Post  Remind Me! Notify Moderator
OfflineMonkeyPod
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Re: transporting h2o2 through water vapor ? [Re: kronnyQ]
    #4049929 - 04/13/05 01:08 PM (12 years, 7 months ago)

Quote:

kronnyQ said:
Nope doesn't absorb CO2 but contams hate lime and it's not gunna break down like H2O2.

Just put a few teaspoons in your bubbler.


Ahah! I was a bit confused because I'd read that soda lime was used in scuba rebreathers and anaesthesia recyclers to scrub CO2. But apparently it also absorbs H2O so I was'nt understanding how puting lime in a bubbler scrubbed CO2 when it's already saturated in water. Now it makes sense...it doesn't absorb CO2. It just creates a basic environment that most contams do not thrive in...got it. So, with that idea in mind I guess it would probably work to put lime in the bottom of a PMP with an air wand and lava rock/geolite.


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Invisiblederx
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Re: transporting h2o2 through water vapor ? [Re: MonkeyPod]
    #4050003 - 04/13/05 01:29 PM (12 years, 7 months ago)

1st of all, H2O2 IS odorless, go open up a bottle and take a big whiff, tell me exactly what you smell. Second, I do not believe H2O2 will evaporate as a whole molecule. I can easily see it breaking apart into H2O(g) + O2(g) because of the huge phase change. Third, why are you going to these extreme unnesicary measures to stop contams? H2O2 isn't going to do very much at all. It might kill a few spores if you're lucky. Are you really having that big of a problem with contams hitting your casings? If you are, try adding CaCO3 to your casings when you make them. End of story.


--------------------
better living through chemistry

OVERGROW the government!!

it's not a war on drugs, it's a war on personal freedom, ok, thats what it is.


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Invisibleohmatic
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Re: transporting h2o2 through water vapor ? [Re: derx]
    #4050064 - 04/13/05 01:44 PM (12 years, 7 months ago)

Quote:

derx said:
1st of all, H2O2 IS odorless, go open up a bottle and take a big whiff, tell me exactly what you smell.  Second, I do not believe H2O2 will evaporate as a whole molecule.  I can easily see it breaking apart into H2O(g) + O2(g) because of the huge phase change.  Third, why are you going to these extreme unnesicary measures to stop contams?  H2O2 isn't going to do very much at all.  It might kill a few spores if you're lucky.  Are you really having that big of a problem with contams hitting your casings?  If you are, try adding CaCO3 to your casings when you make them.  End of story.




actually mate, i dont have any contam problem.
i just like to be extra paranoid, thats it :smile:
peace ohm :mushroom2:


--------------------
:penis: MONOTUB tek :sun: HEATBOMB tek :penis:

RIP #cultivation! ....can't associate? well FUCK U !


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Invisiblederx
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Re: transporting h2o2 through water vapor ? [Re: ohmatic]
    #4050711 - 04/13/05 03:55 PM (12 years, 7 months ago)

if it's not broke, dont fix it.


--------------------
better living through chemistry

OVERGROW the government!!

it's not a war on drugs, it's a war on personal freedom, ok, thats what it is.


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Offlinescatmanrav
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Re: transporting h2o2 through water vapor ? [Re: derx]
    #4050906 - 04/13/05 04:34 PM (12 years, 7 months ago)

>go open up a bottle and take a big whiff, tell me exactly what you smell

I dont know what it is I smell. Its almost sweet...


--------------------
"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


Post Extras: Print Post  Remind Me! Notify Moderator
Invisibleohmatic
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Re: transporting h2o2 through water vapor ? [Re: scatmanrav]
    #4050920 - 04/13/05 04:36 PM (12 years, 7 months ago)

so what now .. possible yay or nay ..
peace ohm :mushroom2:


--------------------
:penis: MONOTUB tek :sun: HEATBOMB tek :penis:

RIP #cultivation! ....can't associate? well FUCK U !


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Invisibleohmatic
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Re: transporting h2o2 through water vapor ? [Re: ohmatic]
    #4317240 - 06/20/05 04:03 PM (12 years, 4 months ago)

el bumperiffico !
peace ohm :mushroom2:


--------------------
:penis: MONOTUB tek :sun: HEATBOMB tek :penis:

RIP #cultivation! ....can't associate? well FUCK U !


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