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12648

Sigma-Aldrich

Potassium nitrate

puriss., meets analytical specification of Ph Eur, BP, USP, FCC, E252, 99.0-100.5%

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Empirical Formula (Hill Notation):
KNO3
CAS Number:
Molecular Weight:
101.10
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

puriss.

Quality Level

assay

99.0-100.5%

form

powder or crystals

quality

meets analytical specification of Ph Eur, BP, USP, FCC, E252

impurities

acidity or alkalinity, complies
reducing matter, complies
residual solvents, complies
≤0.001% heavy metals (as Pb)
≤0.005% ammonium (NH4)

loss

≤0.5% loss on drying, 105 °C

pH

5-8 (20 °C, 5%)

mp

334 °C (lit.)

anion traces

chloride (Cl-): ≤10 mg/kg
nitrite (NO2-): ≤5 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

As: ≤1 mg/kg
Ca: ≤50 mg/kg
Cu: ≤10 mg/kg
Fe: ≤10 mg/kg
Na: ≤1000 mg/kg
Pb: ≤4 mg/kg
Zn: ≤10 mg/kg

suitability

complies for appearance of solution

SMILES string

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

InChI

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

InChI key

FGIUAXJPYTZDNR-UHFFFAOYSA-N

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This Item
31263PX1520PHR2203
Potassium nitrate puriss., meets analytical specification of Ph Eur, BP, USP, FCC, E252, 99.0-100.5%

12648

Potassium nitrate

Essential Grade
Potassium nitrate puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99%

31263

Potassium nitrate

Essential Grade
Potassium Nitrate Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

PX1520

Potassium Nitrate

-
Potassium Nitrate Pharmaceutical Secondary Standard; Certified Reference Material

PHR2203

Potassium Nitrate

-
assay

99.0-100.5%

assay

≥99%

assay

≥99.0%

assay

-

grade

puriss.

grade

-

grade

-

grade

-

mp

334 °C (lit.)

mp

334 °C (lit.)

mp

334 °C

mp

334 °C (lit.)

cation traces

As: ≤1 mg/kg, Cu: ≤10 mg/kg, Na: ≤1000 mg/kg, Zn: ≤10 mg/kg, Ca: ≤50 mg/kg, Pb: ≤4 mg/kg, Fe: ≤10 mg/kg

cation traces

Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, Fe: ≤2 mg/kg, Mg: ≤20 mg/kg, Na: ≤50 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, heavy metals: ≤5 ppm (by ICP-OES)

cation traces

Ca: ≤0.005%, Fe: ≤3 ppm, Mg: ≤0.002%, Na: ≤0.005%, heavy metals: ≤5 ppm

cation traces

-

anion traces

chloride (Cl-): ≤10 mg/kg, sulfate (SO42-): ≤100 mg/kg, nitrite (NO2-): ≤5 mg/kg

anion traces

chloride (Cl-): ≤10 mg/kg, iodate (IO3-): ≤5 mg/kg, nitrite (NO2-): ≤10 mg/kg, phosphate (PO43-): ≤5 mg/kg, sulfate (SO42-): ≤20 mg/kg

anion traces

chloride (Cl-): ≤0.002%, iodate (IO3-): ≤5 ppm, nitrite (NO2-): ≤0.001%, phosphate (PO43-): ≤5 ppm, sulfate (SO42-): ≤0.003%

anion traces

-

General description

Potassium nitrate is colorless potassium salt having rhombic crystals. It is an oxidizing agent. In nature it is found as saltpeter. It can be prepared by reacting potassium carbonate/ hydroxide with nitric acid or by the reaction of sodium nitrate with potassium chloride.1 It can be prepared by combining ammonium nitrate and potassium hydroxide under hot conditions.
Potassium nitrate can find applications as an oxidizer, which can be prepared by combining ammonium nitrate and potassium hydroxide under hot conditions.

Application

Potassium nitrate may be employed for the following studies:
  • Preparation of gun powder, ceramics, glass, dyeing and printing.1
  • As oxidizing agent in the fireworks.1
  • Preparation of potassium nitrite.1
  • As desensitizing agent for tooth hypersensitivity.
  • As phase change material for the preparation of nanofluids with phase change behavior.

pictograms

Flame over circle

signalword

Warning

hcodes

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


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Kosanke.L.K, et al. et al.
Encyclopedic Dictionary of Pyrotechnics: (and Related Subjects) (2012)
A superior desensitizer--potassium nitrate.
M Hodosh
Journal of the American Dental Association (1939), 88(4), 831-832 (1974-04-01)
Rose A Devasia et al.
The Journal of antimicrobial chemotherapy, 63(6), 1173-1178 (2009-03-31)
The aim of this study was to assess the sensitivity, specificity and time to results of mycobacterial growth indicator tube (MGIT) 960, microscopic observation drug susceptibility (MODS) assay and nitrate reductase assay (NRA) compared with the gold standard agar proportion
Changhong Yao et al.
Bioresource technology, 118, 438-444 (2012-06-22)
Microalgal starch is a potential feedstock for biofuel production. The effects of KNO(3) and MgSO(4) concentrations and light intensity on biomass and starch production by the marine microalga, Tetraselmis subcordiformis, were investigated. Under 200 μmol m(-2) s(-1) irradiance and sulfur-deprived
Wolfgang R Engelsberger et al.
The Plant journal : for cell and molecular biology, 69(6), 978-995 (2011-11-09)
Nitrogen is an essential macronutrient for plant growth and development. Inorganic nitrogen and its assimilation products control various metabolic, physiological and developmental processes. Although the transcriptional responses induced by nitrogen have been extensively studied in the past, our work here

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