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This page describes products and general use; it is not medical advice.
0.9% sodium chloride is a sterile solution of sodium chloride in water at 0.9 g per 100 mL, usually called normal saline. The same strength is sold in several labelled formats, and the label, not the strength, decides what a container may be used for. Typical readers are clinic staff, supply buyers and students who need to tell the formats apart.
What 0.9% means on a label
The percentage is mass per volume: 0.9 g of sodium chloride per 100 mL, which the injection labels express as 9 g per litre. The numbers below come from the labels listed under Sources; other manufacturers’ labels can differ slightly (for example in how osmolarity is rounded), so check the label on the container you hold. For the arithmetic behind percent-by-mass solutions, see mass percent solution.
| Label property | Value on the labels cited |
|---|---|
| Sodium chloride | 9 g/L (Hikma injection); 900 mg per 100 mL (irrigation) |
| Sodium and chloride | 154 mmol/L each (Hikma); 154 mEq per 1,000 mL each (AMCO bags) |
| Osmolarity | 308 mOsmol/L (calculated) |
| pH | 4.5 to 7.0 |
The irrigation label calls the solution isotonic and says it is identical in composition to 0.9% Sodium Chloride Injection, USP, often called normal saline.
What it is used for, according to the label
The labelled indications are narrower and more specific than everyday descriptions of saline. The Health Canada-posted Hikma 10 mL injection label describes a sterile, nonpyrogenic solution for fluid and electrolyte replenishment in single-dose containers for intravenous administration. Its indications are as a source of water and electrolytes, as a vehicle or diluent for compatible products for parenteral administration, and as a priming solution in hemodialysis procedures. The AMCO bag label (500 mL and 1,000 mL) states the indication as parenteral replenishment of fluid and sodium chloride as required by the clinical condition of the patient. The irrigation label is indicated for general irrigation, washing, rinsing and dilution purposes that permit a sterile, nonpyrogenic electrolyte solution.
Who uses it: infusion and ward staff (bags), staff preparing compatible parenteral products (diluent vials), dialysis staff (priming, per the Canadian label) and staff handling irrigation, rinsing and dilution tasks.
Formats and containers
| Format | Labelled use | Key difference | Source label |
|---|---|---|---|
| Injection, single-dose 10 mL container | Fluid and electrolyte replenishment; diluent for compatible parenteral products; hemodialysis priming | Single-dose; container is non-latex plastic and the solution-contact materials do not contain PVC, DEHP or other plasticizers | Hikma, Health Canada DPD (May 2022) |
| Injection bags, 500 mL and 1,000 mL | Parenteral replenishment of fluid and sodium chloride | Intravenous product; the provider letter also mentions 250 mL bags, 20 bags per case | AMCO, DailyMed (2024-11-26) |
| Irrigation, 1,000 mL bottle | General irrigation, washing, rinsing and dilution | Marked not for injection; no bacteriostat, antimicrobial agent or added buffer; flexible containers are PVC, semi-rigid containers are polyolefin | HealthFirst, DailyMed |
Bags and their place among other IV fluids are covered in what is an IV bag and IV bag fluid types. Prefilled flush devices are covered in what is a saline flush, and rinsing supplies in wound and surgical irrigation supplies.
How to choose between formats
Criteria stated on the product labels:
- Match the route on the label. The irrigation label is marked for irrigation only and not for injection by usual parenteral routes; the injection labels are for intravenous administration.
- Match the intended task. Irrigation labelling covers irrigation, washing, rinsing and dilution; injection labelling covers fluid and electrolyte replenishment and use as a diluent for compatible parenteral products.
- Check the container wording if materials matter to your setting. The Hikma injection label states a PVC-free, DEHP-free solution-contact path; the irrigation label describes a PVC flexible container or a polyolefin semi-rigid one.
- Single-dose or short-procedure use. The irrigation label says unused portions of smaller volumes should be discarded, and the injection label describes single-dose containers.
Safe use and handling basics
- Storage: the AMCO bag label gives 20 to 25 C (68 to 77 F), the USP controlled room temperature range, and says to protect from freezing.
- Inspect first: do not administer unless the solution is clear and the container is undamaged (AMCO label).
- No series connections: do not use plastic containers in series connections. Using a vented set with the vent open could result in air embolism (AMCO label).
- Heat: the irrigation label says not to heat the container over 66 C (150 F), and that exposure above 25 C during transport and storage leads to minor moisture losses.
- Reactions: the Hikma label says to stop the infusion immediately if signs of a hypersensitivity or infusion reaction appear, and lists hypersensitivity to the drug or any ingredient or container component as a contraindication.
Label cautions about who should not receive it
These are label statements, not individual advice. The Hikma label says the product should be used with great care, if at all, in patients with congestive heart failure, severe renal insufficiency, and clinical states with edema and sodium retention. It states that the risk of fluid or solute overload is directly proportional to the volume given intravenously, that serum sodium should be monitored, and that high volumes carry a risk of hyponatremia. The irrigation label warns that irrigating fluids have been shown to enter the systemic circulation in relatively large volumes and must be regarded as a systemic drug, and that an electrolyte solution should not be used for irrigation during electrosurgical procedures.
Common mistakes
- Treating irrigation saline as injectable. The irrigation product is labelled not for injection by usual parenteral routes, even though its strength, composition and osmolarity match the injection.
- Assuming “0.9%” means the same thing as the intended use. The strength is identical across the formats; the labelled route and indication are what differ.
- Connecting plastic containers in series, which the AMCO label says not to do.
- Assuming every label quotes the same osmolarity or sizes. Read the label of the product actually stocked.
FAQ
What is 0.9% sodium chloride?
A sterile solution of 0.9 g sodium chloride per 100 mL of water, also called normal saline, sold as injection, irrigation and other labelled formats.
What are the uses of 0.9% sodium chloride?
The labelled uses depend on the format: fluid and electrolyte replenishment, a diluent or vehicle for compatible parenteral products and hemodialysis priming for the injection labels cited, and irrigation, washing, rinsing and dilution for the irrigation label.
How is 0.9% sodium chloride used?
Follow the label and the instructions of the prescriber or facility protocol. The injection is given intravenously; the irrigation is not for injection. Individual dosing and procedures are outside the scope of this page.
Is 0.9% sodium chloride isotonic?
The irrigation label describes the solution as isotonic (308 mOsmol/L, calculated), and the injection labels give the same calculated osmolarity.
Sources
- Hikma, 0.9% Sodium Chloride Injection USP 10 mL, prescribing information (Canada), prepared May 20, 2022, Health Canada Drug Product Database: pdf.hres.ca/dpd_pm/00066008.PDF. Checked 2026-10-29.
- AMCO International Corp, 0.9% Sodium Chloride Injection, USP, 500 mL and 1000 mL bags, DailyMed label effective 2024-11-26: DailyMed set ID 259f8ef4-96ac-7213-e063-6394a90adb71. Checked 2026-10-29.
- HF Acquisition Co LLC (HealthFirst), 0.9% Sodium Chloride Irrigation, USP 1000 mL bottle, DailyMed: DailyMed set ID 78825011-268c-784b-e053-2991aa0ae0d4. Checked 2026-10-29.
