🧪 Bacteriostatic Saline Solution—also known as bacteriostatic sodium chloride (NaCl)—is a sterile, isotonic solution of 0.9% sodium chloride in water, enhanced with a bacteriostatic agent, typically benzyl alcohol (0.9–1.1%), to inhibit bacterial growth after the vial is opened.

🔍 Key Features

• Preservative: Benzyl alcohol allows for multi-dose use over up to 28 days, unlike preservative-free saline, which is single-use.

• Sterility: Maintains sterility between uses, making it ideal for clinical settings where repeated access is required.

• Isotonicity: Matches the body's natural saline concentration, minimizing tissue irritation during injection.

• pH Range: Typically between 4.5 and 7.0, with a slightly acidic profile due to the preservative.

💉 Common Uses

• Diluting injectable medications for intramuscular, intravenous, or subcutaneous administration.

• Flushing IV lines to maintain patency and prevent blockages.

• Research and DIY protocols where sterility and multi-use convenience are essential.

⚠️ Safety Notes

• Not for neonates: Benzyl alcohol is contraindicated in newborns due to toxicity risks.

• Not for large-volume infusions or irrigation: Reserved for small-volume injections and drug dilution only.

🧴 Injection Diluent Comparison

💡 Always consult manufacturer guidelines and use aseptic technique. Diluent choice affects comfort, compatibility, and shelf life.