Like many here, I've found BAC water hard to come by. After looking at the Fischer Scientific site, I found G-Biosciences BAC water. It's available on their site, and found here:
Reconstitution solution/Bacteriostatic water
Reconstitution solution/Bacteriostatic water Reconstitution solution/Bacteriostatic water is a sterile water solution containing 0.9% benzyl alcohol. This solution is supplied in borosilicate glass vials for precise dilutions, featuring premium flip cap tops and self-healing butyl rubber stoppers
www.gbiosciences.com
Another product offered by them is Water for Injection (WFI):
Water for Injection, USP Grade*
Water for Injection (WFI) USP Grade*, is produced in ISO9001:2015 & ISO 13485: 2016 certified facilities. Meets specifications of ASTM (American Society for Testing and Materials) Type I Ultrapure water which is used for the most critical applications and advanced analytical procedures in the la
www.gbiosciences.com
They published some charts about various waters, and according to the charts, both BAC and WFI are Type 1 Ultrapure:
Water: Types, Grades, and Applications
Explore laboratory water types, grades, and applications. Understand purity standards for research, biotech, and life science workflows.
info.gbiosciences.com
The WFI does not seem to have alcohol in it. Is there a reason BAC is preferred over WFI? Is it simply the alcohol component?