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Anabolic Steroids

Good vacuum filter to use for EO?

Stevie_min said:

Cheap and effective. Can also get them anywhere else. Thermofisher stuff is on Amazon.

For reference, PVDF is NOT compatible with high BB. I ruined a big batch of Test U with 300mg/1/30 Test U/BA/BB in C8 just yesterday. Only 50ml of 500ml went through the filter, and it clouded on filtration. Filter melted shut is what it looks like. Should have just waited for my trusted filters to arrive :(

PTFE is best bet. Failing that Nylon. Failing that Cellulose Acetate (will be slow as shit, and if you up your vacuum past 0.06MPa to compensate you WILL crack your bottle or tear the filter). But really, don't be like me. Just get PTFE even if it's sometimes out of stock.

Bottom is a good guide on compatibility AND cleaning up your gear with a methanol elution.
Click to expand...
Interesting as this says PVDF is good with BB


And this one says no data available

www.finarchemicals.com

Finar

Here is the detailed information about Chemical Compatibility And Plastic Suitability of Finar
www.finarchemicals.com www.finarchemicals.com

I've used PVDF paper with that glass filtration setup using 2/30 with no issues

EDIT: Disregard the above. Found this one that says it is marginal. Best thing for risk tolerance is to use PTFE filters.

 
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helionn said:
Interesting as this says PVDF is good with BB


And this one says no data available

www.finarchemicals.com

Finar

Here is the detailed information about Chemical Compatibility And Plastic Suitability of Finar
www.finarchemicals.com www.finarchemicals.com

I've used PVDF paper with that glass filtration setup using 2/30 with no issues

EDIT: Disregard the above. Found this one that says it is marginal. Best thing for risk tolerance is to use PTFE filters.

Click to expand...
I think a key point here is to look at the compatibility with ketones (the C8 in my brew, and in the MCT commonly used) as well where the PVDF shows low compatibility. I think the combination of both ketones and BB is why I had catastrophic failure yesterday, and why others might have had success with PVDF. Also note that it's not entirely too happy with short esters either, so even the concentration of Test U I used could have played a part.

Sadly, it looks like 0.2um PTFE Filter tops are out of stock everywhere. Just syringe filters. I'll probably attempt my next brew in Nylon and post about it in a couple of weeks.

Edit: I'm fairly certain Nylon is going to let the brew through, but I am currently researching how much Test would bind to it though. Polyamide (Nylon) binds adsorbs testosterone pretty damn well it seems. See below: https://www.sciencedirect.com/science/article/pii/S0147651323012514
and
1704859561959.png


I'm probably getting paranoid over nothing, but I might just heat sterilize the brew now, and filter with 0.45um PTFE into glass.
 
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so... ptfe vs nylon?

I plan to use 100% EO for future brews now (used to use MCT). I've used 20-30BB in previous brews with MCT but maybe won't need any BB if I use EO, right?

Only time I'd use BB I guess is DHB which I do 1/30 with GSO, I've heard the GSO helps with the PIP. Not sure if EO is recommended to help with that.

I would love to brew trest and tren a at 250mg/ml if anyone has feedback on that... No one does trest above 100 so cant find any info and tren a at 1/20/MCT was crashing after about 2-3 days.
 
Stevie_min said:
I think a key point here is to look at the compatibility with ketones (the C8 in my brew, and in the MCT commonly used) as well where the PVDF shows low compatibility. I think the combination of both ketones and BB is why I had catastrophic failure yesterday, and why others might have had success with PVDF. Also note that it's not entirely too happy with short esters either, so even the concentration of Test U I used could have played a part.

Sadly, it looks like 0.2um PTFE Filter tops are out of stock everywhere. Just syringe filters. I'll probably attempt my next brew in Nylon and post about it in a couple of weeks.

Edit: I'm fairly certain Nylon is going to let the brew through, but I am currently researching how much Test would bind to it though. Polyamide (Nylon) binds adsorbs testosterone pretty damn well it seems. See below: https://www.sciencedirect.com/science/article/pii/S0147651323012514
and
View attachment 274349


I'm probably getting paranoid over nothing, but I might just heat sterilize the brew now, and filter with 0.45um PTFE into glass.
Click to expand...
This is some great info. Thanks for sharing your knowledge and references.
 
Okay, so what about this then:

Amazon.com

www.amazon.com

And then buy PTFE filter papers?

Amazon.com

www.amazon.com

Only see these PTFE on amazon for .22um. Reviews say 47mm will work with the above 50mm thing

Cheaper than buying a dozen of the disposable vacuum filters though.
 
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EXCELLENTMENTALHEALTH said:
Okay, so what about this then:

Amazon.com

www.amazon.com

And then buy PTFE filter papers?

Amazon.com

www.amazon.com

Only see these PTFE on amazon for .22um. Reviews say 47mm will work with the above 50mm thing

Cheaper than buying a dozen of the disposable vacuum filters though.
Click to expand...
The sand cores get clogged relatively fast especially if you are using thicker oils like GSO. Still could probably get 4-8L out of it though. Make sure you soak it in acetone after your brew to dissolve any oil that is stuck in it.
 
helionn said:
The sand cores get clogged relatively fast especially if you are using thicker oils like GSO. Still could probably get 4-8L out of it though. Make sure you soak it in acetone after your brew to dissolve any oil that is stuck in it.
Click to expand...
What are sand cores?

I plan to use EO only now (do I need to use BB still if I'm using EO?). I do plan to brew my DHB with GSO though for the PIP (people seem to say DHB with pip, I do 100mg/ml with 1/30bb/gso). Probably only gonna make like 10ml of it.

What do you mean soak it in acetone? Wouldn't I throw out the membrane after use?
 
EXCELLENTMENTALHEALTH said:
What are sand cores?

I plan to use EO only now (do I need to use BB still if I'm using EO?). I do plan to brew my DHB with GSO though for the PIP (people seem to say DHB with pip, I do 100mg/ml with 1/30bb/gso). Probably only gonna make like 10ml of it.

What do you mean soak it in acetone? Wouldn't I throw out the membrane after use?
Click to expand...
If you look at that glass filter setup there is a white looking disc. That is made of sand/fritted glass. The filter paper goes on top of that. That disc itself is a filter too but a lot larger than filter paper. It can get clogged up overtime.

You will throw out the filter paper after but then soak the glass filter holder/white looking disc thing in acetone.

I have no experience with EO. However I have brewed DHB 100mg/ml in Mig840 with 2/20 with no issues and no PIP.
 
helionn said:
If you look at that glass filter setup there is a white looking disc. That is made of sand/fritted glass. The filter paper goes on top of that. That disc itself is a filter too but a lot larger than filter paper. It can get clogged up overtime.

You will throw out the filter paper after but then soak the glass filter holder/white looking disc thing in acetone.

I have no experience with EO. However I have brewed DHB 100mg/ml in Mig840 with 2/20 with no issues and no PIP.
Click to expand...

So are you saying I should buy a different model?

I brewed DHB in 1/30/GSO and had *minimal* PIP. wasnt really noticeable but after a few weeks it'd kinda wear on you. Not enough to stop or anything, wasn't really that bad, but it was there. Would of course love to reduce that but really not a big deal.

I want to brew trest and tren at 250mg/ml but I can't find much info on it, gonna just try them out at 1/20/EO.
 
EXCELLENTMENTALHEALTH said:
So are you saying I should buy a different model?

I brewed DHB in 1/30/GSO and had *minimal* PIP. wasnt really noticeable but after a few weeks it'd kinda wear on you. Not enough to stop or anything, wasn't really that bad, but it was there. Would of course love to reduce that but really not a big deal.

I want to brew trest and tren at 250mg/ml but I can't find much info on it, gonna just try them out at 1/20/EO.
Click to expand...
For the price just get that and throughly clean it every time.

If money is not a concern, this one is better because it uses stainless steel instead

www.sterlitech.com

VF15, Glass Filtration Set Includes 1L funnel, base, clamp, stopper, GL45 adaptor, and 5L bottle

VF15, Glass Filtration Set Includes 1L funnel, base, clamp, stopper, GL45 adaptor, and 5L bottle
www.sterlitech.com www.sterlitech.com
 
I got money but dude you're saying to spend $500? I mean I'm going to be cleaning my setup every run, I'm gonna be making like, 50ml at a time at most lol. It's for personal usage.
 
The reason syringe filters suck is everyone tried to filter to much through them. I have gone back to using them, because I don't want to take time to sterilize vials anymore. If you use new syringe filter for every vial you can do it by hand in less than 2 minutes with minimal pressure. The largest vials I will do are 20ml, and it maybe take 3 minutes and your hands are not even soar.
 
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