Bacteriostatic water in Australia
Bacteriostatic water is sterile water containing a preservative. Sterivial lists sterile water with 0.9% benzyl alcohol in 3 ml and 10 ml multi-dose vials. Before buying, match the named diluent and its instructions to the product you have been supplied. A similar bottle, the word sterile or the size of a vial does not establish compatibility.
Maths only. Not medical advice.
What bacteriostatic water contains
Benzyl alcohol is added as a bacteriostatic preservative. The DailyMed example linked below describes a multiple-dose container that permits repeated withdrawals. That US label explains the category; it is a separate product from the Sterivial vial. Its instructions cannot establish the storage conditions or opened-vial life of another brand.
Read the ingredients on the actual packaging. Product names can look similar while the contents or intended use differ. The supplied product instructions determine the compatible diluent and preparation requirements. This page does not provide a mixing volume or an injection procedure.
Bacteriostatic water compared with sterile water
The table distinguishes the labelled products used as examples. Sterile Water for Injection in the linked DailyMed label has no added preservative and is supplied in single-dose containers. Bacteriostatic water contains a preservative and the example is labelled multiple-dose. Neither label makes the products interchangeable.
Container size is a separate detail. A large bottle can still be single-dose. A small vial can still carry multi-dose instructions. Check both the contents and the container designation before comparing prices or choosing a pack. The sizes below describe products listed in the cited sources, rather than a survey of Australian stock.
| Detail | Bacteriostatic water | Sterile Water for Injection |
|---|---|---|
| Preservative | Sterivial: 0.9% benzyl alcohol | DailyMed example: none |
| Container designation | Multi-dose | Single-dose in the cited label |
| Listed vial sizes | Sterivial: 3 ml and 10 ml; US DailyMed example: 30 ml | DailyMed examples: 10 ml, 20 ml, 50 ml and 100 ml |
| After opening | Follow the actual supplied label | Cited single-dose label: discard unused portion |
How long an opened vial lasts
Follow the after-opening or first-puncture instructions supplied with your actual vial. There is no universal discard period on this page. The printed expiry and any period after opening are separate instructions. Record an opening date when the supplied instructions require it, and retain the packaging so those instructions remain available.
The cited DailyMed bacteriostatic-water example is a US product. It does not validate an opened-vial shelf life for Sterivial. An online statement about another manufacturer, a different size or another country should not replace the instructions for the vial in your hand.
If an opened-vial instruction is missing or unreadable, ask the supplier for the instructions associated with that product and batch. Avoid filling the gap with a general internet rule. Do not interpret the amount left in the bottle as evidence that it remains suitable for use.
Storage before and after opening
Use the storage directions on the supplied label and accompanying instructions. Keep that information with the vial. Before moving a product into a fridge, freezer or travel bag, check the conditions required for that specific product. A storage statement copied from another listing can refer to different packaging or a different preparation.
The linked DailyMed US example specifies 20 to 25 degrees Celsius. This is an example of a product-specific instruction, not a storage specification for Sterivial. Ask the supplier about a damaged parcel or an uncertain storage history rather than assuming that a clear appearance resolves the question.
What to check on the label
Start with the full product name and ingredients, including the preservative. Match the labelled volume to the variant ordered. Then find the batch or lot identification, printed expiry, storage conditions and any instructions that apply after opening. Keep these details available if you contact the supplier about the order.
Check the seal and the liquid against the supplied instructions. Sterivial product information says not to use the vial if its seal is broken or its liquid is cloudy. A product page is useful for comparing options, but the physical label and supplied instructions remain essential when checking the delivered item.
If the label differs from the online listing, retain the packaging and contact the seller. A clear photograph of the product name, batch and affected packaging helps the seller identify the item. Never assume a substituted item has the same directions simply because the stated volume matches.
Where Australians can look for bacteriostatic water
An Australian pharmacy is a place to ask about the exact product named in your supplied instructions and its availability. Check directly before travelling. A general pharmacy listing or a search result does not confirm that a particular branch holds the item or can order it.
For online purchases, identify the seller and read the full listing. Check the product label details, delivery terms and contact information. The TGA advises checking online sellers and the Australian Register of Therapeutic Goods where applicable. This guide does not claim that a seller or product has a particular registration.
Sterivial lists 3 ml and 10 ml options on its bacteriostatic-water product page. That page shows the current purchase status and the existing catalogue price. A listed size is not an instruction about how much liquid to use. Select supplies against the instructions you already have.
The Chemist Warehouse question
On 4 November 2026, we could not verify a current bacteriostatic-water listing in the public Chemist Warehouse catalogue. The website search returned an access-check page during our check. This does not establish availability at a local pharmacy. Our separate Chemist Warehouse guide explains the result and links to the current search.
Related supplies
If your existing instructions call for a U-100 syringe, compare the barrel capacity, graduations and fixed needle specification. Sterivial lists a 1 ml syringe with a 31G x 8 mm needle. Those specifications describe the item; they do not select a suitable syringe or amount for a person.
Questions about buying and labels
Is bacteriostatic water the same as sterile water?
The cited bacteriostatic-water label includes a preservative. The cited Sterile Water for Injection label is preservative-free and single-dose. Use the exact diluent specified in the supplied instructions.
Does a multi-dose vial have a universal discard date?
No. Follow the actual supplied label and after-opening instructions. A US DailyMed example does not establish the opened-vial life of the Sterivial product.
Does Chemist Warehouse sell it?
We could not verify a current public catalogue listing on 4 November 2026 because its search returned an access-check page. Ask the pharmacy about the exact product and local availability.
Which vial sizes does Sterivial list?
The existing Sterivial catalogue lists 3 ml and 10 ml multi-dose vials containing sterile water with 0.9% benzyl alcohol. Current purchase status is shown on the product page.
Can I use the storage instructions from another brand?
Use the instructions supplied for your own product. Ask the supplier for missing label information, including storage and after-opening directions, before relying on a different brand as a substitute.