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Bacteriostatic Water Wholesale: What Buyers Should Check
What bacteriostatic water actually is, how it differs from sterile water, what the documentation should show, and four things to check before a bulk order.
“Bacteriostatic water” is one of the few laboratory consumables bought alongside cosmetic peptides, and one of the most frequently mis-described items on a quotation. This page sets out what the material is, what distinguishes a good supplier, and what to check before a bulk order.
What it is — and what it is not
| Item | What is in it | Typical use |
|---|---|---|
| Sterile water | Water, nothing added | Single use; no preservative |
| Bacteriostatic water | Sterile water plus benzyl alcohol, usually 0.9% w/v | Laboratory use where a preserved diluent is needed |
| Saline 0.9% | Sodium chloride in water | Different osmolarity, different purpose |
The benzyl alcohol is the whole point: it suppresses microbial growth so a multi-dose container can be entered more than once in a laboratory setting. That also means it is not the same product as plain sterile water, and the two are not interchangeable where a procedure specifies one.
Bacteriostatic water is a laboratory consumable. It is not supplied for human use, and nothing here should be read as dosing or administration guidance.
The four things to check before ordering
1. Benzyl alcohol concentration, stated
A quotation that says only “bacteriostatic water 10 ml” leaves the concentration open. Ask for 0.9% w/v in writing. If the supplier cannot state it, the specification does not exist.
2. Sterility method and the certificate
Sterility is a process claim, not an appearance claim. The documentation should identify the sterilisation method and the lot. Clear liquid in a clean vial proves nothing about sterility.
3. Container and closure
Glass or plastic, and what kind of stopper and seal. The closure is what keeps the contents sterile in transit. Ask for a photo of a packed carton rather than a stock image of a single vial.
4. Labelling that matches the shipment
Every vial should carry the product name, volume, benzyl alcohol content, lot number and a “for laboratory use only” statement. If your buyers resell under their own brand, confirm that private-label labelling is available on this item and not only on peptides.
Packaging and freight notes
Bacteriostatic water is heavy relative to its value, so freight dominates landed cost:
- Order the largest pack size your buyers accept — 10 ml vials in kits are usually cheaper per millilitre than 3 ml.
- Ask for the packed carton weight, not the net weight. The difference decides your air freight quote.
- Glass vials need foam or moulded inserts. Breakage in transit is a cost you carry, not the carrier.
Frequently asked questions
Is bacteriostatic water the same as sterile water?
No. Bacteriostatic water contains benzyl alcohol, usually 0.9% w/v, which suppresses microbial growth. Plain sterile water has nothing added.
What concentration of benzyl alcohol is standard?
0.9% w/v is the common figure. Ask for it in writing on the quotation rather than assuming it.
Can bacteriostatic water be sold for human use?
It is supplied as a laboratory consumable, not for human use, and should be labelled as such.
Why does freight dominate the price?
The product is mostly water: heavy per unit of value. Packed carton weight drives the air freight cost, not net weight.
Can I get private-label labelling on the diluent too?
Often yes, but confirm explicitly — some suppliers only offer custom labels on peptide vials.