221295

Potassium nitrate

ACS reagent, ≥99.0%

• Empirical Formula (Hill Notation): KNO₃
• CAS Number: 7757-79-1
• Molecular Weight: 101.10
• EC Number: 231-818-8
• MDL number: MFCD00011409
• UNSPSC Code: 12352302
• PubChem Substance ID: 329752256
• NACRES: NA.21

Properties

• grade: ACS reagent
• assay: ≥99.0%
• form: crystals
• impurities: ≤0.005% insolubles
• pH: 4.5-8.5 (25 °C, 5%)
• mp: 334 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.002%; iodate (IO₃^-): ≤5 ppm; nitrite (NO₂^-): ≤0.001; phosphate (PO₄^3-): ≤5 ppm; sulfate (SO₄^2-): ≤0.003%
• cation traces: Ca: ≤0.005%; Fe: ≤3 ppm; Mg: ≤0.002%; Na: ≤0.005%; heavy metals: ≤5 ppm (by ICP-OES)
• SMILES string: [K+].[O-][N+]([O-])=O
• InChI: 1S/K.NO3/c;2-1(3)4/q+1;-1
• InChI key: FGIUAXJPYTZDNR-UHFFFAOYSA-N

Description

General description

Potassium nitrate is a water-soluble inorganic salt that is commonly used as nitrogen fertilizer. It is also found in toothpastes as a desensitizer for tooth hypersensitivity. The addition of KNO₃ to growth medium has shown to promote growth in salt stressed melon plants.

Application

Potassium nitrate may be used in the synthesis of 5-bromo-8-nitroisoquinoline via bromination of isoquinoline using N-bromosuccinimide.

Safety Information

• pictograms: GHS03
• signalword: Warning
• hcodes: H272
• pcodes: P210 - P220 - P280 - P370 + P378 - P501
• Hazard Classifications: Ox. Sol. 3
• Storage Class: 5.1B - Oxidizing hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable