A number that follows from the formula, and what it compares to

Published 26 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Nine grams of benzyl alcohol per litre, at a molecular weight of about 108, is about 83 millimoles per litre. Benzyl alcohol does not dissociate, so each molecule is one osmotically active particle and the osmolality is about 80 milliosmoles per kilogram. Normal saline and body fluids are near 290. Bacteriostatic water is therefore strongly hypotonic, and any solute dissolved in it raises its osmolality in proportion to the number of particles added.

The arithmetic

Concentration in moles is mass over molar mass: 9 grams per litre divided by 108 grams per mole is 0.083 moles per litre. A non-electrolyte contributes one particle per molecule, so osmolarity is the same figure. Correcting to osmolality per kilogram of water changes it only slightly. Sterile water without preservative has an osmolality near zero.

Sodium chloride at the same 0.9 per cent gives about 290 because it is lighter per unit and dissociates into two ions.

What changes it

Every solute added. A peptide salt contributes its own particles and its counterions; at the milligram-per-millilitre level that is a small addition for a large peptide and a larger one for a small peptide with several counterions. The resulting osmolality is a property of the finished solution, not of the water.

This is one of the reasons two different peptides dissolved in the same water make two chemically different solutions.

Boundary

This page gives the osmolality of the product as supplied and the arithmetic behind it. It does not state what osmolality any solution should have.

Bacteriostatic water is supplied by REVIVE LAB UAE as a diluent for lyophilised research peptides, for laboratory research use only. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
Bacteriostatic Water3 mL × 2AED 99In stock

Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.

Frequently asked

The arithmetic?

Concentration in moles is mass over molar mass: 9 grams per litre divided by 108 grams per mole is 0.083 moles per litre. A non-electrolyte contributes one particle per molecule, so osmolarity is the same figure. Correcting to osmolality per kilogram of water changes it only slightly. Sterile water without preservative has an osmolality near zero.

Does REVIVE LAB UAE provide dosing guidance?

No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.

How fast is delivery in the UAE?

Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.

Bacteriostatic Water — in stock, dispatched from Dubai
HPLC-verified, lot certificate on every carton, 24-hour delivery nationwide. Browse the catalogue → All peptides UAE

Related reading

Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.