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221295

Potassium nitrate

Name: Potassium nitrate
Brand: SIGALD

ACS reagent, ≥99.0%

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About This Item

Linear Formula:

KNO₃

CAS Number:

7757-79-1

Molecular Weight:

101.10

NACRES:

NA.21

PubChem Substance ID:

329752256

UNSPSC Code:

12352302

EC Number:

231-818-8

MDL number:

MFCD00011409

Assay:

≥99.0%

Grade:

ACS reagent

Form:

crystals

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Properties

grade

ACS reagent

Quality Segment

200

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.

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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

WGK 1

flash_point_f

Not applicable

flash_point_c