Homebrewed L-Carnitine how long does it last

[goomoonryong9]

Hello already got a setup for homebrewing but I want to homebrew a huge batch of l-carnitine to save time.

I was wondering if inj l-carnitine stored in a sterile vial via a .22um pes filter would last for like 4-6months?

Cause from what i've search its "suggested" to use it for 28days only since it will degrade already.

 

[JustJoe]

if you want it to be shelf stable, it needs to be:
1. pH Balanced at 6.3-6.5, use citric acid or HCl to bring down the pH
2. Optionally Buffered: use an appropriate buffering system to maintain the pH. Like a phosphate buffering system
3. Preserved: Use BA at 0.9%, and optimally use Sodium Metabisufite (SMB), and a chelator like EDTA for real stability.
4. Protected from light and oxygen in amber vial