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Potassium Nitrate BP USP IP ACS Analytical Reagent FCC Food grade Manufacturers
Potassium Nitrate
Nitrite Commercial Specifications
For MSDS Sheet Click
MSDS of Potassium
Nitrate BP USP IP ACS FCC Food Grade Manufacturers
Potassium Nitrate BP
KNO3 -- 101.1 -- 7757-79-1
DEFINITION
Potassium nitrate contains not less than 99.0 per
cent and not more than the equivalent of 101.0 per cent of KNO3,
calculated with reference to the dried substance.
CHARACTERS
A white, crystalline powder or
colourless crystals, freely soluble in
water, very soluble in boiling water, practically insoluble in alcohol.
IDENTIFICATION
A. It gives the reaction of nitrates.
B.
Solution S (see Tests) gives the reactions of potassium.
TESTS
Solution S
Dissolve 10.0 g in carbon dioxide-free water prepared from
distilled water and dilute to 100 ml with the same
solvent.
Appearance of solution
Solution S is clear and
colourless.
Acidity or alkalinity
To 10 ml of solution S add 0.05 ml of
bromothymol blue solution. Not more
than 0.5 ml of 0.01 M
hydrochloric acid or 0.01 M sodium hydroxide is required to
change the colour of the indicator.
Reducible substances
To 10 ml of solution S, add 0.5 ml of
dilute
sulphuric acid and 2 ml of zinc
iodide and starch solution. The solution
does not become blue within 2 min.
Chlorides
If intended for ophthalmic use, it complies with
the test for chlorides. Dissolve 2.5 g in water and dilute to 15
ml with the same solvent. The solution complies with the limit test for chlorides (20
ppm).
Sulphates
Dilute 10 ml of solution S to 15 ml with
distilled water. The solution complies with the limit test for
sulphates (150 ppm).
Ammonium
1 ml of solution S complies with the limit test (A)
for ammonium (100 ppm). If intended for
ophthalmic use, not more than 50 ppm of
ammonium. Calcium
Dilute 10 ml of solution S to 15 ml with distilled water. The solution complies with the limit test for
calcium (100 ppm). If intended for
ophthalmic use, not more than 50 ppm of
calcium.
Iron
Dilute 5 ml of solution S to 10 ml with water.
The solution complies with the limit test for iron (20
ppm). If intended for ophthalmic use, not
more than 10 ppm of iron.
Sodium
Not more than 0.1 per cent of Na, determined by
atomic emission spectrometry.
Heavy metals
12 ml of solution S complies with limit test A for
heavy metals (10 ppm).
Loss on drying
Not more than 0.5 per cent determined on 1.000 g by
drying in an oven at 100 °C to 105 °C.
Potassium Nitrate USP
Potassium Nitrate
KNO3 101.10
Potassium nitrate.
Potassium nitrate [7757-79-1].
Potassium Nitrate contains not less than 99.0 percent and not more than 100.5 percent of KNO3.
Identification—
A solution of it responds to
the tests for Potassium and for Nitrate.
Chloride— A 500-mg portion of it shows no
more chloride than corresponds to 0.21 mL of 0.020 N hydrochloric acid (0.03%).
Sulfate—
Dissolve 100 mg of Potassium
Nitrate in 10 mL of water, add 15
mL of 6 N hydrochloric
acid, and evaporate to dryness on a steam bath. To the residue so
obtained add 7 mL of 6 N
hydrochloric acid, and evaporate to dryness on a steam bath.
Dissolve the residue so obtained in about 35 mL
of water and, if necessary, neutralize with hydrochloric acid using
litmus paper indicator. Filter, if necessary, to obtain a clear test
solution. This test solution shows no more sulfate than corresponds
to 0.10 mL of 0.020 N sulfuric acid (0.1%).
Arsenic: 3 ppm.
Lead— A solution of 0.5 g of it in 20
mL of water contains not more than 5 4g of
lead (corresponding to not more than 0.001% of Pb).
Heavy metals: 0.002%.
Iron: not more than 0.001%.
Limit of sodium— the limit is 0.1%.
Limit of nitrite—
To
pass the test.
Potassium Nitrate FCC
KNO3 Formula wt 101.10
INS: 252 CAS: [7757-79-1]
DESCRIPTION
Potassium Nitrate occurs as colorless, transparent
prisms, as white granules, or as a white, crystalline powder. It is
slightly hygroscopic in moist air. One gram dissolves in 3
mL of water at 25°, in 0.5
mL of boiling water, and in about 620
mL of alcohol. Its solutions are neutral to
litmus.
Function: Antimicrobial agent; preservative.
REQUIREMENTS
Identification: A 1:10 aqueous solution gives
positive tests for Potassium and Nitrate.
Assay: Not less than 99.0% and not more than
100.5% of KNO3 after drying.
Chlorate: Sprinkle about 100 mg of dry sample
on 1 mL of sulfuric acid. The mixture does
not turn yellow.
Lead: Not more than 4 mg/kg.
Loss on Drying: Not more than 1%.
ACS Specifications
American Chemical Society
Potassium Nitrate ACS
KNO3
Formula Wt 101.10
CAS Number 7757-79-1
REQUIREMENTS
Assay: 99.0%
KNO3
pH of a 5% solution:
4.5-8.5 at 25C
MAXIMUM ALLOWABLE
Insoluble matter ........... 0.005%
Chloride (Cl)
............... 0.002%
Iodate (IO3) ............... 5 ppm
Nitrite (NO2)
.............. 0.001%
Phosphate (PO4) ........ 5 ppm
Sulfate (SO4)
.............. 0.003%
Heavy metals (as Pb) ... 5 ppm
Iron (Fe)
..................... 3 ppm
Calcium (Ca) ............... 0.005%
Magnesium (Mg)
......... 0.002%
Sodium (Na) ............... 0.005%
Potassium Nitrate BP USP IP ACS Analytical Reagent FCC Food grade Manufacturers:
MUBY CHEMICALS GROUP
DONGRI-CHINCHBUNDER, MUMBAI 400009, INDIA
TEL: (OFFICE)
91-22-23770100, 91-22-23726950, 91-22-23774610, 23723564.
e-mail: info@mubychem.com
