What the research shows
Pfizer’s US prescribing information identifies benzyl alcohol as the preservative in its multiple-dose containers. It also directs readers to the labeling of the specific drug for compatibility. The label documents a pharmaceutical presentation rather than a trial of a peptide treatment. Read the US prescribing information.
Documented formats
The label describes a preserved solution in a multiple-dose container. Sterile Water for Injection is a separately labeled product. Similar packaging does not make two diluents interchangeable.
Testing and purity
Check the exact product name, preservative, manufacturer, lot and expiry. Diluent quality involves controls such as sterility and endotoxins. A peptide purity percentage has no meaning for water.
How to read a batch reportQuestions about Bacteriostatic water
What does bacteriostatic mean here?
The preservative inhibits bacterial growth. The term describes a property of the labeled diluent and does not establish the sterility of anything else.
How do I tell which diluent a study used?
Look at the study formulation or specific product label. The word water alone does not identify a preservative, concentration or packaged product.