What Is BAC. WATER (PURE WATER)?
BAC water (pure water), also known as bacteriostatic water (pure water) in some contexts (note: the naming can be confusing as true bacteriostatic water typically contains benzyl alcohol, while this version is pure sterile water), is a specialized sterile solvent primarily used for reconstituting lyophilized peptide and protein medications.| Aspect | BAC. WATER（pure water） | BAC. WATER（Contains benzyl alcohol） |
| Ingredients | Pure sterile water (only contains purified water, no other additives) | Sterile water with benzyl alcohol (solvent is purified water, added benzyl alcohol as bacteriostatic agent) |
| Function & Application | 1. Only pure sterile solvent, used for immediate reconstitution of single-dose peptide preparations with no bacteriostatic effect; 2. The reconstituted solution must be used up at one time, otherwise it is easy to breed microorganisms and cause contamination; 3. Suitable for peptide products sensitive to additives, and can be used in some administration scenarios requiring strict no additives. | 1. Mainly used for reconstitution of multi-dose peptide preparations; benzyl alcohol can inhibit bacterial growth and extend the service life of the reconstituted solution; 2. Suitable for peptide products that need to be extracted and used multiple times, reducing the risk of contamination; 3. Not recommended for reconstitution of intravenous preparations due to the bacteriostatic agent. |
| Precautions | 1. No bacteriostatic ingredients; if the reconstituted solution is not used in time, the remaining solution should be discarded; 2. It needs to be stored in a sterile environment and used as soon as possible after opening; 3. It can only be used as a temporary reconstitution solvent and does not have the conditions for long-term preservation of the solution. | 1. Benzyl alcohol has a risk of local irritation to some people and may cause pain at the injection site; 2. It should be used with caution in infants and young children to avoid adverse reactions caused by benzyl alcohol accumulation; 3. The reconstituted solution should be stored in refrigeration as required, and the service cycle should not exceed the requirements of the instruction manual. |
