Benzyl Benzoate

Benzyl Benzoate (BB) is a solvent found in most homebrew and pharmecutical vials.

Tyger’s guide says:

Lower concentrations of BB are generally desired to decrease the amount of post-injection pain that some people experience. However, there are so many different combinations of hormone ester, hormone concentration and carrier oil that it’s diffcult to know how low you can go. Low solubility will paradoxically cause more pain, even if the ester hasn’t visibly crashed.

Some homebrewers claim that you don’t need any BB at all, and I often get requests for custom vials without it, so consider stocking this as an option. I think a lot of people assume they are sensitive to BB without first trying another carrier oil or considering that their post-injection pain maybe caused by a dirty vial. Maybe I’m just reluctant to stop using BB, as it makes the oil thinner and therefore easier for me to work with.

Keep in mind that Tyger does not cite their sources, and that this information is word of mouth.

Don’t expose to heat

Exposure to excessive heat (above 40C) should be avoided.¹

Unfortunately there is not more information available from this source on why we should avoid heat. However, your BB will be mixed with BA, which, we have better data for, and also should avoid heat.

References