Cheapest by weight
$19.23 per kilogram
Price per unit, converted to US dollars
At Lab Alley, United States
- Pack
- 25 kilograms for $480.66
- Grade
- Laboratory grade · packs of 25 kilograms and up
Restricted sale. Suppliers must be licensed, or must report certain sales, above the strengths and quantities the law sets. Buy only from a licensed supplier.
Potassium Nitrate suppliers and prices
- Formula
- KNO3
- CAS number
- 7757-79-1
- Molar mass
- 101.10 g/mol
Smallest amount to spend
$19.95 for 500 grams
Total for one pack, in the store's own currency
At Science Company, United States
- Works out at
- $39.90 per kilogram
- Grade
- Food grade · packs of 50 grams to 1 kilogram
16 offers from 3 stores · Prices checked October 28, 2026 · Prices run from $19.23 to $3.85 per kilogram, because a bigger pack costs less per kilogram.
Show prices per
Every price we found
21 prices, cheapest first
| Store | Grade and pack | Price | Link |
|---|---|---|---|
| Lab AlleyUnited States | Laboratory grade · packs of 25 kilograms and up25 kilograms for $480.66 | $19.23 per kilogram | View at store |
| Science CompanyUnited States | Food grade · packs of 1 to 25 kilograms2.5 kilograms for $49.95 | $19.98 per kilogram | View at store |
| Lab AlleyUnited States | Laboratory grade · packs of 1 to 25 kilograms12 kilograms for $271.58 | $22.63 per kilogram | View at store |
| Lab AlleyUnited States | ACS grade · packs of 25 kilograms and up25 kilograms for $683.39 | $27.34 per kilogram | View at store |
| Lab AlleyUnited States | USP grade · packs of 25 kilograms and up25 kilograms for $683.39 | $27.34 per kilogram | View at store |
| Lab AlleyUnited States | Food grade · packs of 25 kilograms and up25 kilograms for $683.39 | $27.34 per kilogram | View at store |
| Lab AlleyUnited States | Food grade · packs of 1 to 25 kilograms22.7 kilograms for $803.35 | $35.42 per kilogram | View at store |
| Lab AlleyUnited States | ACS grade · packs of 1 to 25 kilograms22.7 kilograms for $803.35 | $35.42 per kilogram | View at store |
| Lab AlleyUnited States | USP grade · packs of 1 to 25 kilograms22.7 kilograms for $803.35 | $35.42 per kilogram | View at store |
| Science CompanyUnited States | Food grade · packs of 50 grams to 1 kilogram500 grams for $19.95 | $39.90 per kilogram | View at store |
| Lab DepotUnited States | Grade not stated · packs of 1 to 25 kilograms12 kilograms for $852.53 | $71.04 per kilogram | View at store |
| Lab AlleyUnited States | Laboratory grade · packs of 50 grams to 1 kilogram500 grams for $50.47 | $101 per kilogram | View at store |
| Lab DepotUnited States | ACS grade · packs of 1 to 25 kilograms12 kilograms for $1,347.24 | $112 per kilogram | View at store |
| Lab DepotUnited States | Grade not stated · packs of 50 grams to 1 kilogram500 grams for $84.08 | $168 per kilogram | View at store |
| Lab AlleyUnited States | ACS grade · packs of 50 grams to 1 kilogram500 grams for $85.32 | $171 per kilogram | View at store |
| Lab AlleyUnited States | Food grade · packs of 50 grams to 1 kilogram500 grams for $92.79 | $186 per kilogram | View at store |
| Lab AlleyUnited States | USP grade · packs of 50 grams to 1 kilogram500 grams for $92.79 | $186 per kilogram | View at store |
| Lab DepotUnited States | USP grade · packs of 1 to 25 kilograms12 kilograms for $2,242.00 | $187 per kilogram | View at store |
| Lab DepotUnited States | ACS grade · packs of 50 grams to 1 kilogram500 grams for $236.74 | $473 per kilogram | View at store |
| Lab DepotUnited States | USP grade · packs of 50 grams to 1 kilogram500 grams for $319.87 | $640 per kilogram | View at store |
| Lab DepotUnited States | ACS grade · packs of 10 to 50 grams25 grams for $96.33 | $3.85 per gram | View at store |
Making a solution?
Pick the strength and how much you need. We work out the grams of Potassium Nitrate and what they cost at the cheapest store we track.
- You need
- 101 grams
- of Potassium Nitrate, molar mass 101.10 g/mol
- That much costs
- $1.94
- $1.94 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
15 companies make or distribute it, as reported to the US Environmental Protection Agency in 2020 and 2024.
- Basstech InternationalDistributor · New Jersey
- HydriteDistributor · California, Iowa
- Miles ChemicalDistributor · California
- ACS ChemicalMaker · New Jersey
- AndersonsMaker · Ohio
- Everris NAMaker · Missouri
- Haifa North AmericaMaker · Florida
- HoneywellMaker · New Jersey
- ICLMaker · Missouri
- SQM North AmericaMaker · Georgia
- BrenntagDistributor · Kentucky · last reported 2020
- Valudor ProductsDistributor · California · last reported 2020
- Avantor Performance MaterialsMaker · New Jersey · last reported 2020
- Scotts Miracle-GROMaker · Ohio · last reported 2020
- UPL NAMaker · North Carolina · last reported 2020
Your company? List it free and get bulk buyer requests.
Similar chemicals
Sold by
Chemical identity
- Formula
- KNO3
- Molar mass
- 101.10 g/mol
- CAS number
- 7757-79-1
- InChIKey
- FGIUAXJPYTZDNR-UHFFFAOYSA-N
- Official record
- PubChem 24434
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.