Molekula
Potassium nitrate
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 nitrate is an inorganic compound used in fertilizers, food preservation, and pyrotechnics. It is a white crystalline solid with a molecular formula of KNO3, a molecular weight of 101.10 g/mol, and a CAS number of 7757-79-1. It should be stored at ambient temperatures and is classified with a warning signal word. Molekula supplies Potassium nitrate 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.
Often bought together
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.
-
1 kg — £30.90 per pack ex VAT · £37.08 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 | Anhydrous White Crystals |
| Water insoluble matter | ≤0.05% |
| Lead (Pb) | ≤5ppm |
| Identification (IR) | Conforms to reference |
| Chlorine (Cl) | ≤2000ppm |
| Nitrite (NO2)- | ≤0.003 % |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 5.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless, rhombic or trigonal crystals |
| Odour | Odorless |
| Melting Point | 337 °C |
| Boiling Point | 400 °C (decomp) |
| Refractive Index | 1.335 |
Source: PubChem CID 24434 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 42094732 |
| CAS Number | 7757-79-1 |
| IUPAC Name | potassium nitrate |
| EC Number | 231-818-8 |
| Molecular Formula | KNO3 |
| Molecular Weight | 101.10 |
| Exact Mass | 100.9515 |
| SMILES | [N+](=O)([O-])[O-].[K+] |
| InChIKey | FGIUAXJPYTZDNR-UHFFFAOYSA-N |
| InChI | InChI=1S/K.NO3/c;2-1(3)4/q+1;-1 |
| PubChem CID | 24434 |
| UN Number | UN1486 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2834.21.00.00 |
| Tariff Code | 2834210000 |
Safety & GHS
-
Oxidizing
GHS03
-
Health Hazard
GHS07
Hazard statements
- H272 May intensify fire; oxidizer
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P220 Keep/Store away from clothing/combustible materials
- P221 Take any precaution to avoid mixing with combustibles
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Collo-Bo
- Kalii nitras
- Kaliumnitrat
- Niter
- Nitrate of potash
- Nitre
- Nitric acid, potassium salt
- Saltpeter
- saltpetre
- Vicknite
Frequently asked questions
What is potassium nitrate used for?
Potassium nitrate is commonly used in fertilizers, food preservation, and pyrotechnics due to its oxidizing properties.
What is the chemical formula and molecular weight of potassium nitrate?
The formula is KNO3 and the molecular weight is 101.10 g/mol.
How should potassium nitrate be stored?
It should be stored at ambient temperature in a dry, well-ventilated area away from incompatible materials.
What grade of potassium nitrate does Molekula supply?
Molekula supplies reagent grade potassium nitrate suitable for laboratory and industrial applications.
Can Molekula supply potassium nitrate in bulk?
Yes, Molekula can supply potassium nitrate in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a potassium nitrate order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.