Cheapest by weight
$1.02 per kilogram
Price per unit, converted to US dollars
At The Soap Kitchen, United Kingdom
- Pack
- 25 kilograms for 19.20 GBP
- Grade
- Grade not stated · packs of 25 kilograms and up
Water suppliers and prices
- Formula
- H2O
- CAS number
- 7732-18-5
- Molar mass
- 18.02 g/mol
Smallest amount to spend
1.20 GBP for 500 grams
Total for one pack, in the store's own currency
At The Soap Kitchen, United Kingdom
- Works out at
- $3.20 per kilogram
- Grade
- Grade not stated · packs of 50 grams to 1 kilogram
16 offers from 7 stores · Prices checked October 28, 2026 · Prices run from $1.02 to $37.64 per kilogram, because a bigger pack costs less per kilogram.
Show prices per
Liquids switch to the matching volume: microlitre, millilitre, litre, fluid ounce or US gallon.
Every price we found
16 prices, cheapest first
| Store | Grade and pack | Price | Link |
|---|---|---|---|
| The Soap KitchenUnited Kingdom | Grade not stated · packs of 25 kilograms and up25 kilograms for 19.20 GBP | $1.02 per kilogram | View at store |
| The Soap KitchenUnited Kingdom | Grade not stated · packs of 1 to 25 kilograms5 kilograms for 5.20 GBP | $1.38 per kilogram | View at store |
| Lab AlleyUnited States | Laboratory grade · packs of 25 litres and up208 litres for $292.32 | $1.40 per litre | View at store |
| Lab AlleyUnited States | USP grade · packs of 25 litres and up208 litres for $495.67 | $2.38 per litre | View at store |
| The Soap KitchenUnited Kingdom | Grade not stated · packs of 50 grams to 1 kilogram500 grams for 1.20 GBP | $3.20 per kilogram | View at store |
| Lab AlleyUnited States | Laboratory grade · packs of 1 to 25 litres18.9 litres for $110.36 | $5.83 per litre | View at store |
| Wards ScienceUnited States | Grade not stated · packs of 1 to 25 litres3.8 litres for $25.50 | $6.71 per litre | View at store |
| Science CompanyUnited States | Grade not stated · packs of 1 to 25 litres3.79 litres for $25.50 | $6.74 per litre | View at store |
| Lab AlleyUnited States | USP grade · packs of 1 to 25 litres18.9 litres for $140.58 | $7.43 per litre | View at store |
| Boreal ScienceCanada | Grade not stated · packs of 1 to 25 litres3.8 litres for 40.30 CAD | $7.58 per litre | View at store |
| GFS ChemicalsUnited States | HPLC grade · packs of 1 to 25 litres20 litres for $215.21 | $10.76 per litre | View at store |
| GFS ChemicalsUnited States | LC-MS grade · packs of 1 to 25 litres16 litres for $294.07 | $18.38 per litre | View at store |
| Lab AlleyUnited States | HPLC grade · packs of 1 to 25 litres16 litres for $387.94 | $24.25 per litre | View at store |
| Lab AlleyUnited States | LC-MS grade · packs of 1 to 25 litres16 litres for $437.65 | $27.35 per litre | View at store |
| Lab DepotUnited States | HPLC grade · packs of 1 to 25 litres16 litres for $567.60 | $35.48 per litre | View at store |
| GFS ChemicalsUnited States | LC-MS grade · Solution 0.1% · packs of 1 to 25 litres4 litres for $150.57 | $37.64 per litre | View at store |
Making a solution?
Pick the strength and how much you need. We work out the grams of Water and what they cost at the cheapest store we track.
- You need
- 18 grams
- of Water, molar mass 18.02 g/mol
- That much costs
- $0.02
- $0.02 per litre of solution, at the lowest price per gram we found
Weigh it out, dissolve it in less water than you need, then top up to the full amount.
Bulk suppliers in the US
5 companies make or distribute it, as reported to the US Environmental Protection Agency in 2020 and 2024.
- BrenntagDistributor · Kentucky
- Tribute EnergyDistributor · Texas
- RavagoMaker · Florida
- Haldor TopsoeMaker · Texas · last reported 2020
- Pennzoil-Quaker StateMaker · Texas · last reported 2020
Your company? List it free and get bulk buyer requests.
Sold by
Used for
Chemical identity
- Formula
- H2O
- Molar mass
- 18.02 g/mol
- CAS number
- 7732-18-5
- InChIKey
- XLYOFNOQVPJJNP-UHFFFAOYSA-N
- Official record
- PubChem 962
How we compare: each store's own price, turned into US dollars at European Central Bank rates of 2026-10-29, then divided by the pack size. Shipping and tax are not included.