Does bac water go bad? My bottle has been open 3 weeks

B
Joined 2026
22 posts
21d ago · 385 views

mostly full still. is it still good?

3 Replies

H
Joined 2025
205 posts
hexaclinicContributor
21d ago

Bacteriostatic water is 0.9% benzyl alcohol + sterile water. Once opened, stability is usually 28 days per manufacturer spec. After that, the bacteriostatic agent concentration drops enough that it's no longer reliably preserving. Fresh bottles are like $3. Just pitch it.

Q2 stack
  • CJC-1295 no DAC · 100 mcg · pre-bed · sub-Q
  • Ipamorelin · 200 mcg · pre-bed · sub-Q
  • BPC-157 · 500 mcg · 2x/day · sub-Q
B
Joined 2026
22 posts
21d ago

ok, pitching. thanks.

F
Joined 2026
35 posts
20d ago

I draw a little line on my bac vial + date when I open it. never have to guess.

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