Molekula
Potassium nitrite (KNO2)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium nitrite (KNO2) is an inorganic compound used as a corrosion inhibitor, in the synthesis of dyes and pharmaceuticals, and as a food preservative in limited applications. It appears as a white to pale yellow crystalline powder. CAS: 7758-09-0, Molecular Formula: KNO2, Molecular Weight: 85.10 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies Potassium nitrite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £29.50 per pack ex VAT · £35.40 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to light yellow powder |
| Heavy metals | ≤ 0.005% |
| Chloride (Cl-) | ≤ 0.02% |
| Assay | ⩾ 98.0% |
| Moisture | ≤ 2.0% |
| Water insoluble matter | ≤ 0.01% |
| Iron (Fe) | ≤ 0.005% |
| Sulphates (SO4)(2-) | ≤ 0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 5.1 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White crystals |
| Melting Point | 441 °C |
| Boiling Point | 537 °C (explodes) |
Source: PubChem CID 516910 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 36161158 |
| CAS Number | 7758-09-0 |
| IUPAC Name | potassium nitrite |
| EC Number | 231-832-4 |
| Molecular Formula | KNO2 |
| Molecular Weight | 85.10 |
| Exact Mass | 84.9566 |
| SMILES | N(=O)[O-].[K+] |
| InChIKey | BXNHTSHTPBPRFX-UHFFFAOYSA-M |
| InChI | InChI=1S/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1 |
| PubChem CID | 516910 |
| UN Number | UN1488 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28341050 |
| Tariff Code | 2834100000 |
Safety & GHS
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Oxidizing
GHS03
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Toxic
GHS06
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Hazardous to the Environment
GHS09
Hazard statements
- H272 May intensify fire; oxidizer
- H301 Toxic if swallowed
- H400 Very toxic to aquatic life
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Caswell No. 698
- EPA Pesticide Chemical Code 076203
- INS NO.249
- Kaliumnitrit
- KNO2
- Nitrous acid potassium salt (1:1)
- Nitrous acid, potassium salt
- POTASSIUM NITRITE
- Potassium nitrite (1:1)
- POTASSIUM NITRITE (15N)
Frequently asked questions
What is potassium nitrite used for?
Potassium nitrite is primarily used as a corrosion inhibitor and in the synthesis of other nitrogen-containing compounds, including dyes and pharmaceuticals.
What is the chemical formula and molecular weight of potassium nitrite?
The chemical formula is KNO2, and the molecular weight is 85.10 g/mol.
How should potassium nitrite be stored?
Store at ambient temperature, away from moisture and incompatible materials, in a tightly closed container.
What grade of potassium nitrite does Molekula supply?
Molekula supplies potassium nitrite in reagent grade, suitable for laboratory and industrial applications.
Can Molekula supply potassium nitrite in bulk?
Yes, Molekula can supply potassium nitrite in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a purchase of potassium nitrite?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) compliant with GHS standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.