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Merck
CN

221295

Potassium nitrate

ACS reagent, ≥99.0%

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About This Item

Empirical Formula (Hill Notation):
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

Key Documents

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Product Name

Potassium nitrate, ACS reagent, ≥99.0%

InChI key

FGIUAXJPYTZDNR-UHFFFAOYSA-N

InChI

1S/K.NO3/c;2-1(3)4/q+1;-1

SMILES string

[K+].[O-][N+]([O-])=O

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 (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.003%

cation traces

Ca: ≤0.005%
Fe: ≤3 ppm
Mg: ≤0.002%
Na: ≤0.005%
heavy metals: ≤5 ppm (by ICP-OES)

Quality Level

200

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Application

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

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.

pictograms

Flame over circle
GHS03

signalword

Warning

hcodes

H272

Hazard Classifications

Ox. Sol. 3

Storage Class

5.1B - Oxidizing hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

易制爆化学品
危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ8930
MKCZ8932
MKCZ8934
0000507781
0000507781

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Response of vesicular-arbuscular endomycorrhizal sweetgum seedlings to three nitrogen fertilizers.
Brown RW, et al.
Forest Science, 27(2), 413-420 (1981)
Improved salt tolerance of melon (Cucumis melo L.) by the addition of proline and potassium nitrate.
Kaya C, et al.
Environmental and Experimental Botany, 60(3), 397-403 (2007)
Potassium nitrate toothpaste for dentine hypersensitivity
Poulsen S, et al.
Cochrane database of systematic reviews (Online), 2, D001476-D001476 (2001)
Synthesis of 5-Bromoisoquinoline and 5-Bromo-8-nitroisoquinoline.
Organic Syntheses, 98-104 (2005)
A superior desensitizer--potassium nitrate.
M Hodosh
Journal of the American Dental Association (1939), 88(4), 831-832 (1974-04-01)
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