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BAC Question: 0.9% sodium chloride or 0.9% benzyl alcohol

6 replies4 peopleMar 10, 2026☆ Follow
Summary

Is bacteriostatic 0.9% sodium chloride suitable for reconstituting retatrutide or should regular bacteriostatic water with benzyl alcohol be used instead?

Users report that 0.9% sodium chloride causes precipitation when mixed with retatrutide while standard bacteriostatic water does not. One person ordered the saline version by mistake and plans to keep it for other uses after ordering the correct product. The saline version has been used successfully with most peptides except tesamorelin and 5-amino, and questions remain about its compatibility with GHK-Cu mixes.

What this discussion establishesStill open

Whether bacteriostatic saline is acceptable for GHK-Cu or KLOW mixes

Nothing here is advice.

6 replies · 4 people
SteadyHarbour78archiveopening postMar 10

I received bacteriostatic 0.9% sodium chloride when I expected the usual version. The label mentions distribution by the company but looks different from the bacteriostatic water that has the red color block showing 0.9% benzyl alcohol. Did I order the wrong item? Can this still be used with Reta? Should I order the version with the reddish pink label instead? I'm new to this and want to start correctly. Any advice would help.

PatientCompass58archiveMar 10

My experience suggests poor compatibility with the compound. An earlier discussion from the previous year compared different mixing liquids for it and included some images. Recently I tried preparing batches using bacteriostatic solution alongside standard saline, drawing from the exact same production batch. While saline commonly serves to thin various medicines, this time it resulted in visible precipitation.

SlowLantern99archiveMar 10

Both versions show up listed without markings, probably over processor concerns. When the standard one got requested but the salt version arrived instead, I contacted them about swapping it out. If the salt one ended up chosen by accident, others have noted it doesn't pair well with that compound, so sending it back might end up more trouble than worth, though holding it for later work on peptides could still work out.

SteadyHarbour78archiveMar 12
↳ replying to @SlowLantern99

Yeah I messed up there. So I got the regular bac water and I'll keep the saline stuff around for whenever it might come in handy later on. Lesson learned😎 Cheers

PatientCompass58archiveMar 12
↳ replying to @SteadyHarbour78

That one turned out fine across every other thing I've tried it on up to this point. I skipped the pair that ended up failing completely though. Your cash ended up being fine.

SteadyHarbour78archiveMay 26

Curious whether bacteriostatic saline might pair okay with GHK-CU or perhaps the KLOW blend.

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