Bacteriostatic water: US labels, marketing status and Australian rules

What does the US drug label for bacteriostatic water say?

The US label for bacteriostatic water describes a sterile, nonpyrogenic water containing 0.9% or 1.1% benzyl alcohol, classes it as a drug diluent and lists a neonate contraindication (DailyMed record, label revised August 2019, listing dated 8 July 2026, read 14 October 2026). It warns that hemolysis may result when the water is given into a vein without a solute, states a pH of 5.7 and carries a room-temperature storage statement. Five further bacteriostatic water labels from repackagers, companies that relabel another maker's product, also state benzyl alcohol as the preservative, a pH of 5.7 and a room-temperature storage statement (17 November 2025, 17 November 2025, 10 January 2025, 23 May 2023 and 7 July 2014).

What bacteriostatic water is walks through each label line in plain words.

Does a US label carry an after-opening time limit for bacteriostatic water?

No. None of the six full bacteriostatic water labels on DailyMed contains an after-opening time limit or any text about a period after opening (read 14 October 2026). Opened-vial time limits come from USP General Chapter 797, a pharmacy practice chapter that CDC cites (CDC, 26 March 2024), so a figure of that kind is a practice standard and not label text. A manufacturer may state its own date on a label, and these labels state none.

Storage and expiry lays out the evidence for opened vials, including the contamination surveys behind such limits.

What does the label say about benzyl alcohol in bacteriostatic water?

The label names benzyl alcohol as the bacteriostatic preservative, at 0.9% or 1.1%, and warns about it directly. It states that benzyl alcohol has been associated with toxicity in neonates, and it lists fluid replacement and epidural or spinal anaesthesia procedures among the uses it bars for preparations containing benzyl alcohol (DailyMed, read 14 October 2026). The toxicity warning rests on a June 1982 CDC case report of 16 deaths in pre-term infants, in which the editors cautioned that many features also occur in newborns who are seriously ill from other causes, so the report records a suspected association (MMWR, 11 June 1982).

The label adds that animal reproduction studies have not been conducted with the water and that safety and effectiveness have not been established in pediatric patients (DailyMed, read 14 October 2026).

How do US labels separate bacteriostatic water from sterile water?

The labels separate the two by preservative, container and warnings. The bacteriostatic water label carries benzyl alcohol, describes multiple-dose vials and is marked 'NOT FOR USE IN NEONATES'. The sterile water label carries no bacteriostat or antimicrobial agent and describes only single-dose containers (DailyMed, read 14 October 2026). Each product has its own marketing application: NDA018802 for bacteriostatic water and NDA018801 for sterile water vials (DailyMed). The full comparison adds saline and irrigation water.

What have US records said about benzyl alcohol and newborns?

In June 1982 CDC's MMWR described 16 deaths of pre-term infants weighing under 2500 grams at two US institutions, thought to be caused by the benzyl alcohol preservative in a bacteriostatic saline flush for central catheters, and the editors cautioned that many of the clinical features also occur in newborns who are seriously ill from other causes, so the report is a case series of a suspected association and not a controlled safety trial (MMWR, 11 June 1982). FDA had recommended that flush solutions containing benzyl alcohol not be used for newborns (MMWR, 11 June 1982). The warning now printed on the vial reads 'NOT FOR USE IN NEONATES' (DailyMed).

Gershanik et al. described the gasping syndrome and benzyl alcohol poisoning in the New England Journal of Medicine in 1982. Side effects sets out the wider record.

Is bacteriostatic water FDA approved?

DailyMed shows two kinds of marketing record for bacteriostatic water. Six listings with full label text (8 July 2026, 17 November 2025, 17 November 2025, 10 January 2025, 23 May 2023 and 7 July 2014) name application NDA018802, a US new drug application number (DailyMed, read 14 October 2026). A seventh listing, dated 25 June 2026, carries the marketing category 'unapproved drug other' (DailyMed). Whether any particular bottle sold elsewhere matches one of these records is something a label cannot show on its own. This page reports the marketing category field as DailyMed shows it and does not judge either kind of record.

Is bacteriostatic water regulated in Australia?

Australia keeps two relevant records: the Poisons Standard and the Australian Register of Therapeutic Goods (ARTG). The October 2026 Poisons Standard (F2026L01327, read 14 October 2026) has no standalone entry for water, sodium chloride or benzyl alcohol in its index, and the only benzyl alcohol entry is 'tannic acid/benzyl alcohol product' in Appendix B, clause 3. The ARTG entry 198332, a sterile water 5 mL ampoule with an ARTG date of 30 April 2013, shows that the register holds sterile water products (TGA, read 14 October 2026).

No entry for a benzyl-alcohol-preserved bacteriostatic water turned up in the TGA pages opened for this check. An ARTG database search was not run, so a missing entry here is not a missing entry on the register. Neither a missing named entry in the Poisons Standard nor one ARTG example decides the legal position of any other product. The TGA's guidance, last updated 19 November 2024, requires a multidose medicine to be adequately preserved for its whole claimed shelf life. A scheduling entry is one question and registration is another, and the peptides and Australian law page keeps the peptide questions apart from both.

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