Making BAC water at home?

Hey everyone, finding bacteriostatic water here in Brazil is proving difficult. I've only managed to find sterile water from a local supplier, but without the alcohol, it won't last long after opening. Any fellow users in Brazil know where you get your BAC water?

Just grab some benzyl alcohol and mix it to a 0.9% concentration.

I've read about people making their own BAC water. How often do people actually do that?

Not sure how common it is, but you're already halfway there since you have sterile water.

Someone in the UK had the same problem getting it and ended up making it. I used Gemini to summarize the recipe cause I couldn't find the original post. Double check this yourself, filter it maybe, and use it at your own risk:

Use sterile water: Distilled water is best. If you use tap water, boil it for like a quarter of an hour, then let it cool completely.
Measure benzyl alcohol carefully:
For 10 mL of water: Use 0.09 mL of benzyl alcohol (that's 9 units on an insulin syringe).
For 30 mL of water: Use 0.27 mL of benzyl alcohol (27 units).
For 100 mL of water: Use 0.9 mL of benzyl alcohol (90 units).

Mix well: After you add the benzyl alcohol, put the cap on the vial and mix it gently until it's all mixed in.
Store the mix right: Keep it in a vial that's clean and sealed. It will last for a month after you make it. Keep it in a spot that's cool and dark — you can even put it in the fridge.
Safety First:
Don't use plastic if you can help it; glass is better so chemicals don't leak.
Make sure everything you use is super clean (like with alcohol wipes or by boiling).
Don't ever use BAC water in your mouth or in your veins without a doctor watching over you.
This is just for learning and should not be used on people or animals without training and the right way to keep things sterile.

Hey there! I'm in Teresópolis.

I get mine from a local manufacturer.
Seems OK, haven't had issues. No signs of any contamination in my vials even after a month. They have some good feedback on their Instagram too.

I have some experience in the lab, and, honestly, I don't think it's a great idea to DIY bac water. Maybe selling the water, putting in vials and pressure cooking before adding the benzil. Still looks sketchy though

I don't think this is any worse than buying Chinese BAC from those websites. At least you know what's in it. If you can find a good local source, like SlightlyLess88 suggested, that's better than making your own. The instructions I posted were for someone who couldn't get it where they lived in Europe at all.

Awesome to know, thanks!

30 days isn't a hard rule. I've gone close to 2 months sometimes. I just add a bit more benzyl after a month and haven't had any problems.

Well, that 30-day thing was from Gemini. If you're making your own, it's not a bad idea to follow. I only use name-brand BAC water, and the 30-day thingies is for places where a vial is opened frequently over the day or week. For personal use, I've stretched it past a couple months with no issues, checking for stuff floating or if it gets cloudy. Since this was from Gemini and for homemade BAC, I left it.

I've been using peptides for a while now. Has anyone had luck finding a doc in the UK or EU who actually prescribes them, not just the 'research only' stuff? Finding a pharmacy is even harder.

I agree with GeneTaco, when it comes to BAC, I'd rather know where mine comes from and what's in it. I've seen some scary stuff out there. And research-nerd, adding extra benzyl alcohol? I would not recommend that!

My word! You all making your own BAC water? I just get mine from overseas when I can! I was in Iraq this summer and picked up a year's supply of semaglutide for around $1500. It's way cheaper than here in the States!

Zara64 said:

My word! You all making your own BAC water? I just get mine from overseas when I can! I was in Iraq this summer and picked up a year's supply of semaglutide for around $1500. It's way cheaper than here in the States!

Click to expand...

Just be careful with that, Zara64. Make sure it was refrigerated the whole time. Semaglutide is only good for 56 days outside of refrigeration according to the pharmacist.

Oh wow Zara64, that's a steal! It's crazy how much prices vary. And thanks Patti_Real for the heads up about refrigeration!

Bacteriostatic water prep at home is well-documented across the forum. The short version: sterile water plus 0.9% benzyl alcohol by volume. Sourcing pharmaceutical-grade benzyl alcohol is the main variable. Many EU/South American users go this route because commercial BAC options either don't export or hit customs.

The careful approach is right - contamination is the main concern with home BAC. Filter the solution through a 0.22 micron syringe filter and store away from light. Target 0.9% benzyl alcohol by volume.

The 90-day shelf life of opened commercial BAC is in the right ballpark - the benzyl alcohol at 0.9% is doing the bacteriostatic work. For DIY: sterile water plus 0.9% benzyl alcohol (USP grade) in sterile sealed vials is the standard route, but the sterility of the mixing process is the failure point most people underestimate. Clean room conditions aren't feasible for most, but at minimum sterile gloves, a sterile vial, and a syringe filter to transfer.