Phosphate Buffered Saline calculator
A sterile salt-and-buffer solution used to dissolve and dilute laboratory compounds. Not a drug.
Also known as: PBS, Sterile saline buffer, 无菌水
FDA status — not an approved drug Not a drug and not FDA-approved for any therapeutic use. Phosphate buffered saline is a laboratory diluent, not a medication.
This draw does not fit the selected syringe.100000 units exceeds the 100-unit barrel. Choose a larger syringe, use less bacteriostatic water, or split the dose.
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What Phosphate Buffered Saline is
Phosphate buffered saline (PBS) is a sterile solution of salts and phosphate buffer that matches the salt concentration and pH of the human body. It is a standard laboratory diluent used to dissolve, dilute, and handle biological compounds and cells. It is a solvent, not a therapeutic agent.
Research depth: 1/5 A standard laboratory diluent, not a therapeutic compound. Human trials: Not applicable. This measures how much has been studied — counting animal and laboratory work — not whether it works for you.
How Phosphate Buffered Saline works
The phosphate buffer holds the pH steady near neutral, and the salt concentration matches body fluids (isotonic), so biological materials are not damaged by osmotic shock or pH swings. This makes it a gentle, inert medium for handling compounds. It has no pharmacological effect of its own.
Phosphate Buffered Saline side effects
Commonly reported
- Not an active ingredient — no therapeutic effect
- Isotonic and pH-balanced, so generally inert
Serious — seek medical care
- No preservative — not suited to multi-dose injectable storage
- Not a medication — it is a laboratory diluent
- Sterility must be maintained for any injectable-related use
This list is not exhaustive. Report anything unexpected to the clinician who prescribed it. If you have severe abdominal pain, trouble breathing, or signs of an allergic reaction, seek care the same day. See also our guide to peptide side effects by class.
A worked example
A 30 mg vial reconstituted with 30 mL of bacteriostatic water gives 1 mg/mL. A 1000000 mcg dose is then 1000 mL — about 100000 units on a 100-unit insulin syringe, giving roughly 0 doses per vial before accounting for residual volume left in the vial and syringe.
Prefer paper? Download the printable Phosphate Buffered Saline dosing chart (PDF) — every vial size and water volume in syringe units, with the same review byline as this page. All charts →
Commonly cited dose range
Figures circulating for Phosphate Buffered Saline run from 1000000 mcg to 1000000 mcg. This is a solvent, not an active ingredient — it has no dose. It is used to dissolve and dilute compounds. Figures shown reflect that it is a diluent, not a dosed compound.
Read this as reference information, not instruction. These numbers describe what is commonly discussed, not what is right for any individual. Dose, frequency, and whether to use Phosphate Buffered Saline at all are decisions for a licensed clinician who knows your history.
Common questions
What is phosphate buffered saline used for?
PBS is a sterile salt-and-buffer solution used in laboratories to dissolve, dilute, and wash cells and compounds. It matches the body's salt concentration and pH, making it gentle for handling biological materials.
Is PBS the same as bacteriostatic water?
No. PBS is a buffered salt solution with no preservative, used mainly in laboratory work. Bacteriostatic water contains benzyl alcohol as a preservative and is the standard for multi-dose injectable reconstitution.