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Potassium Carbonate & Potassium Bicarbonate

Potassium Carbonate and Potassium Bicarbonate Supplier, Manufacturer's Representative

CAS number : 67-48-1
EINECS EC code number: 200-655-4
Molecular Weight: 139.63
Chemical Formula: HOCH2CH2N (CH3)3HCl

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DESCRIPTION

Potassium Carbonate BP
Formula: K2CO3
CAS Number: 584-08-7
Action and use: Excipient.

DEFINITION
Content: 99.0 per cent to 101.0 per cent (dried substance).

CHARACTERS
Appearance: White or almost white granular powder, hygroscopic.
Solubility: Freely soluble in water, practically insoluble in ethanol (96 per cent).

IDENTIFICATION
A. Dissolve 1 g in 10 ml of water. The solution is strongly alkaline.
B. 2 ml of the solution prepared for identification test A gives the reaction of carbonates and bicarbonates.
C. 1 ml of the solution prepared for identification test A gives reaction of potassium.

TESTS
Solution S: Dissolve 10.0 g in 25 ml of distilled water. Slowly add 14 ml of hydrochloric acid. When the effervescence has ceased, boil for a few minutes. Allow to cool and dilute to 50 ml with distilled water.
Appearance of solution: Solution S is not more opalescent than reference suspension and not more intensely coloured than reference solution.
Chlorides: Maximum 100 ppm.
Sulphates: Maximum 100 ppm.
Calcium: Maximum 100 ppm.
Iron: Maximum 10 ppm.
Heavy metals: Maximum 20 ppm.
Loss on drying: Maximum 5.0 per cent, determined on 0.300 g by drying in an oven at 120-125°C for 5 h.

Potassium Carbonate USP
Formula: K2CO3
Weight: (anhydrous) 138.21
Carbonic acid, dipotassium salt.
Dipotassium carbonate [CAS Number 584-08-7].
Sesquihydrate 165.23

Potassium Carbonate contains not less than 99.5 percent and not more than 100.5 percent of K2CO3, calculated on the dried basis.

Identification: It responds to the tests for Potassium and for Carbonate.
Loss on drying: Dry it at 180 for 4 hours: it loses not more than 0.5% of its weight.
Insoluble substances: Dissolve 1 g in 20 mL of water: the solution is complete, clear, and colorless.
Heavy metals: Dissolve 4.0 g in 10 mL of water, add 15 mL of 3 N hydrochloric acid, and heat to boiling. Add 1 drop of PhPh TS, and neutralize with 1 N sodium hydroxide until the solution is faintly pink in color. Cool, and dilute with water to 25 mL: the limit is 0.0005%.

Potassium Carbonate FCC Food Grade
Formula-- K2CO3, wt--anhydrous 138.21
Formula-- K2CO3·1½H2O, wt--hydrated 165.23
INS: 501(i)
CAS: [CAS Number 584-08-7]

DESCRIPTION
Potassium Carbonate is anhydrous or contains 1.5 molecules of water of crystallization. The anhydrous form occurs as a white, granular powder, and the hydrated form as small, white, translucent crystals or granules. It is very deliquescent, and its solutions are alkaline. One gram dissolves in 1 mL of water at 25° and in about 0.7 mL of boiling water. It is insoluble in alcohol.
Function: pH control.

REQUIREMENTS
Identification: A 1:10 aqueous solution gives positive tests for Potassium and for Carbonate.
Assay: Not less than 99.0% and not more than 100.5% of K2CO3 after drying.
Insoluble Substances: Passes test.
Lead: Not more than 2 mg/kg.
Loss on Drying Anhydrous: Not more than 1%; Hydrated: Between 10.0% and 16.5%.

Potassium Carbonate Anhydrous Analytical Reagent
Potassium Carbonate, Anhydrous
Formula: K2CO3
Weight: 138.21
CAS Number: 584-08-7

REQUIREMENTS
Assay: 99.0% K2CO3 min

MAXIMUM ALLOWABLE
Insoluble matter: 0.01%
Chloride (as Cl): 0.003%
Nitrogen compounds (as N): 0.001%
Phosphate (PO4): 0.001%
Silica (SiO2): 0.005%
Sulfur compounds (as SO4): 0.004%
Ammonium hydroxide precipitate: 0.01%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 5 ppm
Calcium: 0.005%
Magnesium: 0.002%
Sodium (Na): 0.02%

Potassium Carbonate Sesquihydrate Analytical Reagent
Potassium Carbonate Sesquihydrate
Formula: K2CO3 . 1.5H2O
Weight: 165.23
CAS Number: 6381-79-9

REQUIREMENTS
Assay: 98.5-101.0% K2CO3 . 1.5H2O
Loss on heating at 285C: 14.0-16.5%

MAXIMUM ALLOWABLE
Insoluble matter: 0.01%
Chloride (as Cl): 0.003%
Nitrogen compounds (as N): 0.001%
Phosphate (PO4): 0.001%
Silica (SiO2): 0.005%
Sulfur compounds (as SO4): 0.004%
Ammonium hydroxide precipitate: 0.01%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 5 ppm
Calcium (Ca): 0.005%
Magnesium (Mg): 0.002%
Sodium (Na): 0.02%

Potassium Bicarbonate BP
(Potassium, Hydrogen Carbonate, Ph Eur)
Formula: KHCO3
Weight: 100.1
CAS NO.: 298-14-6
Action and use: Excipient.

DEFINITION
Content: 99.0 per cent to 101.0 per cent.

CHARACTERS
Appearance: White or almost white, crystalline powder or colourless crystals.
Solubility: Freely soluble in water, practically insoluble in ethanol (96 per cent).
When heated in the dry state or in solution, it is gradually converted to potassium carbonate.

IDENTIFICATION
A. To 5 mL of solution S (see Tests) add 0.1 mL of PhPh solution. A pale pink
colour is produced. Heat; gas is evolved and the colour becomes red.
B. It gives the reaction of carbonates and bicarbonates.
C. 1 mL of solution S gives reaction (b) of potassium.

TESTS
Solution S: Dissolve 5.0 g in 90 mL of 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.
Carbonates: The pH of freshly prepared solution S is not greater than 8.6.
Chlorides: Maximum 150 ppm.
Sulfates: Maximum 150 ppm.
Ammonium: Maximum 20 ppm.
Calcium: Maximum 100 ppm.
Iron: Maximum 20 ppm, determined on solution S.
Sodium: Maximum 0.5 per cent.
Atomic emission spectrometry: To pass the test.
Heavy metals: Maximum 10 ppm.

Potassium Bicarbonate USP
Formula: KHCO3
Weight: 100.12
Carbonic acid, monopotassium salt.
Monopotassium carbonate [298-14-6].

Potassium Bicarbonate contains not less than 99.5 percent and not more than 101.5 percent of KHCO3, calculated on the dried basis.
Packaging and storage: Preserve in well-closed containers.
Identification: A solution (1 in 10) responds to the tests for Potassium and for Bicarbonate .
Loss on drying: Dry it over silica gel for 4 hours: it loses not more than 0.3% of its weight.
Normal carbonate: Grind 3.0 g of Potassium Bicarbonate with 25 mL of alcohol and 5 mL of water in a porcelain mortar. Add 3 drops of PhPh TS, and titrate slowly with barium chloride solution, prepared by dissolving 12.216 g of barium chloride in 300 mL of water and diluting with alcohol to obtain 1000 mL of solution, until the suspension becomes colorless. Continue the grinding for 2 minutes, and if the color turns pink, continue the titration with the barium chloride solution to a colorless end-point. Repeat the grinding for 2 minutes and the addition of the barium chloride solution, if necessary, until the suspension is colorless after 2 minutes of grinding. Each mL of the barium chloride solution is equivalent to 6.911 mg of K2CO3: not more than 2.5% is found.
Heavy metals: To 2 g add 5 mL of water and 8 mL of 3 N hydrochloric acid, heat to boiling, and maintain that temperature for 1 minute. Add 1 drop of PhPh and sufficient 6 N ammonium hydroxide, drop wise, to give the solution a faint pink color. Cool, add 2 mL of 1 N acetic acid, and then dilute with water to 25 mL: the limit is 0.001%.

Potassium Bicarbonate FCC Food Grade
KHCO3 Formula wt 100.12
INS: 501(ii) CAS: [298-14-6]

DESCRIPTION
Potassium Bicarbonate occurs as colorless, transparent, monoclinic prisms or as a white, granular powder. It is stable in air. Its solutions are neutral or alkaline to PhPh. One gram dissolves in 2.8 mL of water. It is almost insoluble in alcohol.
Function: pH control; leavening agent.

REQUIREMENTS
Identification: A 1:10 aqueous solution gives positive tests for Potassium and for Bicarbonate.
Assay: Not less than 99.0% and not more than 101.5% of KHCO3, calculated on the dried basis.
Carbonate: Passes test.
Lead: Not more than 2 mg/kg.
Loss on Drying: Not more than 0.25%.


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