Cheapest by weight
$25.98 per kilogram
Price per unit, converted to US dollars
At Science Company, United States
- Pack
- 2.5 kilograms for $64.95
- Grade
- Grade not stated · packs of 1 to 25 kilograms
Potassium Alum suppliers and prices
- Formula
- AlKO8S2
- CAS number
- 10043-67-1
- Molar mass
- 258.21 g/mol
Smallest amount to spend
$21.95 for 500 grams
Total for one pack, in the store's own currency
At Science Company, United States
- Works out at
- $43.90 per kilogram
- Grade
- Grade not stated · packs of 50 grams to 1 kilogram
8 offers from 3 stores · Prices checked October 28, 2026 · Prices run from $25.98 to $822 per kilogram, because a bigger pack costs less per kilogram.
Show prices per
Every price we found
8 prices, cheapest first
| Store | Grade and pack | Price | Link |
|---|---|---|---|
| Science CompanyUnited States | Grade not stated · packs of 1 to 25 kilograms2.5 kilograms for $64.95 | $25.98 per kilogram | View at store |
| Science CompanyUnited States | Grade not stated · packs of 50 grams to 1 kilogram500 grams for $21.95 | $43.90 per kilogram | View at store |
| GFS ChemicalsUnited States | ACS grade · packs of 1 to 25 kilograms2.5 kilograms for $372.69 | $149 per kilogram | View at store |
| Lab DepotUnited States | Food grade · packs of 1 to 25 kilograms12 kilograms for $1,917.85 | $160 per kilogram | View at store |
| GFS ChemicalsUnited States | ACS grade · packs of 50 grams to 1 kilogram500 grams for $110.52 | $221 per kilogram | View at store |
| Lab DepotUnited States | ACS grade · packs of 1 to 25 kilograms12 kilograms for $2,831.67 | $236 per kilogram | View at store |
| Lab DepotUnited States | Food grade · packs of 50 grams to 1 kilogram500 grams for $196.32 | $393 per kilogram | View at store |
| Lab DepotUnited States | ACS grade · packs of 50 grams to 1 kilogram500 grams for $411.21 | $822 per kilogram | View at store |
Making a solution?
Pick the strength and how much you need. We work out the grams of Potassium Alum and what they cost at the cheapest store we track.
- You need
- 258 grams
- of Potassium Alum, molar mass 258.21 g/mol
- That much costs
- $6.71
- $6.71 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
1 company makes or distributes it, as reported to the US Environmental Protection Agency in 2020 and 2024.
- HollandMaker · Massachusetts
Your company? List it free and get bulk buyer requests.
Similar chemicals
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Used for
Chemical identity
- Formula
- AlKO8S2
- Molar mass
- 258.21 g/mol
- CAS number
- 10043-67-1
- InChIKey
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J
- Official record
- PubChem 24856
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.