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Potassium Phosphate Monobasic Dibasic Tribasic Pure & BP USP NF FCC ACS Food Grade Manufacturers

Potassium Phosphates Commercial grade
Potassium Phosphate USP BP IP FCC ACS Food Grade Manufacturers

Monobasic Potassium Phosphate Monobasic Manufacturers BP USP NF Monopotassium Phosphate Manufacturers
Dibasic Potassium Phosphate Dibasic Manufacturers BP USP NF Dipotassium Phosphate Manufacturers
Tribasic Potassium Phosphate Tribasic Manufacturers BP USP NF Tripotassium Phosphate Manufacturers

Mono Di Tri Potassium Phosphate
Technical & Pure Crystals
Also IP BP Ph. Eur. USP ACS AR LR FCC Food Grades

Dipotassium Phosphate Monopotassium Phosphate Tripotassium Phosphate

Dipotassium Hydrogen Phosphate BP
Dipotassium Phosphate BP

K2HPO4 -- 174.2 -- 7758-11-4
Dibasic Potassium Phosphate BP
Potassium Phosphate Dibasic BP

DEFINITION
Dipotassium phosphate contains not less than 98.0 per cent and not more than the equivalent of 101.0 per cent of K2HPO4, calculated with reference to the dried substance.

CHARACTERS
A white powder or colourless crystals, very hygroscopic, very soluble in water, very slightly soluble in alcohol.

IDENTIFICATION
A. Solution S (see Tests) is slightly alkaline
B. Solution S gives reaction of phosphates.
C. Solution S gives reaction of potassium.

TESTS
Solution S
Dissolve 5.0 g in distilled water and dilute to 50 ml with the same solvent.
Appearance of solution
Solution S is clear and colourless.
Reducing substances
Heat on a water-bath for 5 min a mixture of 5 ml of solution S, 5 ml of dilute sulphuric acid and 0.25 ml of 0.02 M potassium permanganate. The solution remains faintly pink.
Chlorides
To 2.5 ml of solution S add 10 ml of dilute nitric acid and dilute to 15 ml with water. The solution complies with the limit test for chlorides (200 ppm).
Sulphates
To 1.5 ml of solution S add 2 ml of dilute hydrochloric acid and dilute to 15 ml with  distilled water. The solution complies with the limit test for sulphates (0.1 per cent).
Arsenic
5 ml of solution S complies with limit test A for arsenic (2 ppm).
Iron
10 ml of solution S complies with the limit test for iron (10 ppm).
Heavy metals
Dissolve 2.0 g in 8 ml of water. Acidify with about 6 ml of dilute hydrochloric acid (pH 3 to 4) and dilute to 20 ml with water. 12 ml of the solution complies with limit test A for heavy metals (10 ppm).
Sodium
If intended for use in the manufacture of parenteral dosage forms, it contains not  more than 0.1 per cent of Na, determined by atomic emission spectrometry.
Loss on drying
Not more than 2.0 per cent, determined on 1.000 g by drying in an oven at 125C to 130C.
Bacterial endotoxins
Less than 1.1 IU/mg, if intended for use in the manufacture of parenteral dosage forms without a further appropriate procedure for the removal of bacterial endotoxins.


Potassium Dihydrogen Phosphate BP
Monopotassium Phosphate BP

KH2PO4 -- 136.1 -- 7778-77-0
Monobasic Potassium Phosphate BP
Potassium Phosphate Monobasic BP

DEFINITION
Potassium dihydrogen phosphate contains not less than 98.0 per cent and not more than the equivalent of 100.5 per cent of KH2PO4, calculated with reference to the dried substance.

CHARACTERS
A white, crystalline powder or colourless crystals, freely soluble in water, practically insoluble in alcohol.

IDENTIFICATION
A. Solution S (see Tests) is faintly acid.
B. Solution S gives reaction (b) of phosphates.
C. 0.5 ml of solution S gives reaction 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.
pH
To 5 ml of solution S add 5 ml of carbon dioxide-free water. The pH of the solution is 4.2 to 4.5.
Reducing substances
To 5 ml of solution S add 5 ml of dilute sulphuric acid and 0.25 ml of 0.02 M  potassium permanganate. Heat on a water-bath for 5 min. The colour of the permanganate is not completely discharged.
Chlorides
Dilute 2.5 ml of solution S to 15 ml with water R. The solution complies with the limit  test for chlorides (200 ppm).
Sulphates
To 5 ml of solution S add 0.5 ml of hydrochloric acid and dilute to 15 ml with  distilled water. The solution complies with the limit test for sulphates (300 ppm).
Arsenic
0.5 g complies with limit test A for arsenic (2 ppm).
Iron
10 ml of solution S complies with the limit test for iron (10 ppm).
Sodium
If intended for use in the manufacture of parenteral dosage forms, it complies with the  test for 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 2.0 per cent, determined on 1.000 g by drying in an oven at 125C to 130C.


Dibasic Potassium Phosphate USP
Dipotassium Phosphate USP

Potassium Phosphate Dibasic USP
K2HPO4 174.18
Phosphoric acid, dipotassium salt.
Dipotassium hydrogen phosphate [7758-11-4].

Dibasic Potassium Phosphate contains not less than 98.0 percent and not more than 100.5 percent of K2HPO4, calculated on the dried basis.

Identification— A solution (1 in 20) responds to the tests for Potassium and for Phosphate.
pH: between 8.5 and 9.6, in a solution (1 in 20).
Loss on drying— Dry it at 105 to constant weight: it loses not more than 1.0% of its weight.
Insoluble substances— Dissolve 10 g in 100 mL of hot water, filter through a tarred filtering crucible, wash the insoluble residue with hot water, and dry at 105 for 2 hours: the weight of the residue so obtained does not exceed 20 mg (0.2%).
Carbonate— To 1 g add 3 mL of water and 2 mL of 3 N hydrochloric acid: not more than a few bubbles are evolved.
Chloride— A 1.0-g portion shows no more chloride than corresponds to 0.40 mL of 0.020 N hydrochloric acid (0.03%).
Sulfate— A 0.20-g portion shows no more sulfate than corresponds to 0.20 mL of 0.020 N sulfuric acid (0.1%).
Arsenic: 3 ppm.
Iron— the limit is 0.003%.
Sodium— A solution (1 in 10) tested on a platinum wire imparts no pronounced yellow color to a non-luminous flame.
Heavy metals: the limit is 0.001%.
Limit of fluoride— The limit is 0.001%.
Limit of monobasic or tribasic salt— Dissolve 3 g in 30 mL of water, cool to 20o, and add 3 drops of thymol blue TS: a blue color is produced, which is changed to yellow (with a greenish tinge) by the addition of not more than 0.4 mL of 1 N hydrochloric acid.


Monobasic Potassium Phosphate USP NF
Monopotassium Phosphate USP NF

Mono Potassium Phosphate USP NF
Potassium Phosphate Monobasic USP NF
KH2PO4 136.09
Phosphoric acid, monopotassium salt.
Monopotassium phosphate [7778-77-0].

Monobasic Potassium Phosphate, dried at 105 for 4 hours, contains not less than 98.0 percent and not more than 100.5 percent of KH2PO4.

Identification— A solution (1 in 20) responds to the tests for Potassium 191 and for Phosphate.
Loss on drying— Dry it at 105 for 4 hours: it loses not more than 1.0% of its weight.
Insoluble substances— Dissolve 10 g in 100 mL of hot water, filter through a tarred filtering crucible, wash the insoluble residue with hot water, and dry at 105 for 2 hours: the residue does not exceed 20 mg (0.2%).
Arsenic: 3 ppm.
Lead— not more than 5 ppm of Pb).
Heavy metals— : the limit is 0.002%.
Limit of fluoride— The limit is 0.001%.


Potassium Metaphosphate USP NF

Potassium Metaphosphate
KPO3 118.07
Metaphosphoric acid (HPO3), potassium salt.
Potassium metaphosphate [7790-53-6].

Potassium Metaphosphate is a straight-chain polyphosphate, having a high degree of polymerization. It contains the equivalent of not less than 59.0 percent and not more than 61.0 percent of P2O5.

Identification—
A: Add 1 g of finely powdered Potassium Metaphosphate, slowly and with vigorous stirring, to 100 mL of sodium chloride solution (1 in 50): a gelatinous mass is formed.
B: Boil a mixture of 0.5 g of Potassium Metaphosphate, 10 mL of nitric acid, and 50 mL of water for 30 minutes, and cool: the resulting solution responds to the tests for Potassium and for Phosphate.
Viscosity— Mix 300 mg with 200 mL of sodium pyrophosphate solution (3.5 in 1000), using a magnetic stirrer. Determine the viscosity of the clear solution obtained, or of the liquid phase of the mixture obtained after 30 minutes of continuous stirring: the viscosity is between 6.5 and 15 centipoises.
Lead— not more than 5 ppm of Pb.
Heavy metals—: the limit is 0.002%.
Limit of fluoride— To pass the test.


Potassium Phosphate Dibasic FCC
Dipotassium Monophosphate; Dipotassium Phosphate FCC
Dibasic Potassium Phosphate FCC

K2HPO4 Formula wt 174.18
INS: 340(ii) CAS: [7758-11-4]

DESCRIPTION
Potassium Phosphate, Dibasic, occurs as a colorless or white, granular salt that is deliquescent when exposed to moist air. One gram is soluble in about 3 mL of water. It is insoluble in alcohol. The pH of a 1% solution is about 9.
Function: Buffer; sequestrant; yeast food.

REQUIREMENTS
Identification: A 1:20 aqueous solution gives positive tests for Potassium and for Phosphate.
Assay: Not less than 98.0% of K2HPO4 after drying.
Arsenic: Not more than 3 mg/kg.
Fluoride: Not more than 10 mg/kg.
Insoluble Substances: Not more than 0.2%.
Lead: Not more than 2 mg/kg.
Loss on Drying: Not more than 2.0%.


Potassium Phosphate Monobasic FCC

Potassium Biphosphate; Potassium Dihydrogen Phosphate;\.
Monopotassium Phosphate FCC
Monobasic Potassium Phosphate FCC
KH2PO4 Formula wt 136.09
INS: 340(i) CAS: [7778-77-0]

DESCRIPTION
Potassium Phosphate, Monobasic, occurs as colorless crystals or as a white, granular or crystalline powder. It is stable in air. It is freely soluble in water, but is insoluble in alcohol. The pH of a 1:100 aqueous solution is between 4.2 and 4.7.
Function: Buffer; sequestrant; yeast food.

REQUIREMENTS
Identification: A 1:20 aqueous solution gives positive tests for Potassium and for Phosphate.
Assay: Not less than 98.0% of KH2PO4 after drying.
Arsenic: Not more than 3 mg/kg.
Fluoride: Not more than 10 mg/kg.
Insoluble Substances: Not more than 0.2%.
Lead: Not more than 2 mg/kg.
Loss on Drying: Not more than 1%.


Potassium Phosphate, Tribasic FCC
Tripotassium Phosphate FCC
Tribasic Potassium Phosphate FCC

K3PO4 Formula wt 212.27
INS: 340(iii) CAS: [7778-53-2]

DESCRIPTION
Potassium Phosphate, Tribasic, occurs as white, hygroscopic crystals or granules. It is anhydrous or may contain one molecule of water of hydration. It is freely soluble in water, but is insoluble in alcohol. The pH of a 1:100 aqueous solution is about 11.5.
Function: Emulsifier.

REQUIREMENTS
Identification: A 1:20 aqueous solution gives positive tests for Potassium and for Phosphate.
Assay: Not less than 97.0% of K3PO4, calculated on the ignited basis.
Arsenic: Not more than 3 mg/kg.
Fluoride: Not more than 10 mg/kg.
Insoluble Substances: Not more than 0.2%.
Lead: Not more than 2 mg/kg.
Loss on Ignition Anhydrous: Not more than 5.0%; Monohydrate: Between 8.0% and 20.0%.


Potassium Polymetaphosphate FCC

Potassium Metaphosphate; Potassium Polyphosphates
Potassium Kurrol’s Salt
(KPO3)n
INS: 452(ii) CAS: [7790-53-6]

DESCRIPTION
Potassium Polymetaphosphate occurs as a white powder. It is a straight-chain polyphosphate having a high degree of polymerization. It is insoluble in water, but is soluble in dilute solutions of sodium salts.
Function: Emulsifier; moisture-retaining agent.

REQUIREMENTS
Identification:
A. Finely powder about 1 g of sample, and while stirring vigorously, add it slowly to 100 mL of a 1:50 sodium chloride solution. A gelatinous mass forms.
B. Mix 500 mg of sample with 10 mL of nitric acid and 50 mL of water, boil for about 30 min, and cool. The resulting solution gives positive tests for Potassium and for Phosphate.
Assay: Not less than 59.0% and not more than 61.0% of P2O5.
Arsenic: Not more than 3 mg/kg.
Fluoride: Not more than 10 mg/kg.
Lead: Not more than 2 mg/kg.
Viscosity: Between 6.5 and 15 centipoises.


Potassium Pyrophosphate FCC

Tetrapotassium Pyrophosphate
K4P2O7 Formula wt 330.34
INS: 450v CAS: [7320-34-5]

DESCRIPTION
Potassium Pyrophosphate occurs as colorless or white crystals or as a white, crystalline or granular powder. It is hygroscopic. It is very soluble in water, but is insoluble in alcohol. The pH of a 1:100 aqueous solution is about 10.5.
Function: Emulsifier; texturizer.

REQUIREMENTS
Identification:
A. A 1:20 aqueous solution gives positive tests for Potassium.
B. Dissolve 100 mg of sample in 100 mL of 1.7 N nitric acid. Add 0.5 mL of this solution to 30 mL of quimociac TS. A yellow precipitate does not form. Heat the remaining portion of the sample solution for 10 min at 95°, and add 0.5 mL of it to 30 mL of quimociac TS. A yellow precipitate forms immediately.
Assay: Not less than 95.0% of K4P2O7, calculated on the ignited basis.
Arsenic: Not more than 3 mg/kg.
Fluoride: Not more than 10 mg/kg.
Insoluble Substances: Not more than 0.1%.
Lead: Not more than 2 mg/kg.
Loss on Ignition: Not more than 0.5%.


ACS Specifications
American Chemical Society

Potassium Phosphate Dibasic ACS

Dibasic Potassium Phosphate ACS
Dipotassium Phosphate ACS
Dipotassium Hydrogen Phosphate
K2HPO4
Formula Wt 174.18
CAS Number 7758-11-4

REQUIREMENTS
Assay: 98.0% K2HPO4
pH of a 5% solution: 8.5-9.6 at 25C

MAXIMUM ALLOWABLE
Insoluble matter: 0.01%
Loss on drying at 105C: 1.0%
Chloride (Cl): 0.003%
Nitrogen compounds (as N): 0.001%
Sulfate (SO4): 0.005%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 0.001%
Sodium (Na): 0.05%


ACS Specifications
American Chemical Society

Potassium Phosphate Tribasic ACS
Tripotassium Orthophosphate

Tripotassium Phosphate ACS
Tribasic Potassium Phosphate ACS
K3PO4
Formula Wt 212.27
K3PO4 . 7H2O
Formula Wt 338.38
CAS Number 7778-53-2 anhydrous; 22763-02-6 heptahydrate

REQUIREMENTS
Assay (as-is basis): 98% K3PO4 or K3PO4 . 7H2O

MAXIMUM ALLOWABLE
Dibasic potassium phosphate (K2HPO4) 1%
Excess alkali (as KOH): 1%
Insoluble matter: 0.01%
Chloride (Cl): 0.005%
Nitrogen compounds (as N): 0.002%
Heavy Metals (as Pb): 0.002%
Iron (Fe): 0.001%
Sulfate (SO4): 0.005%
Sodium (Na): 0.1%


ACS Specifications
American Chemical Society

Potassium Phosphate Monobasic ACS
Potassium Dihydrogen Phosphate ACS
Monopotassium Phosphate ACS
Monobasic Potassium Phosphate ACS

KH2PO4
Formula Wt 136.09
CAS Number 7778-77-0

REQUIREMENTS
Assay: 99.0% KH2PO4
pH of a 5% solution: 4.1-4.5 at 25C

MAXIMUM ALLOWABLE
Insoluble matter: 0.01%
Loss on drying at 105C: 0.2%
Chloride (Cl): 0.001%
Nitrogen compounds (as N) . 0.001%
Sulfate (SO4): 0.003%
Heavy metals (as Pb): 0.001%
Iron (Fe): 0.002%
Sodium (Na): 0.005%

Mono Monopotassium Monobasic Potassium Phosphate Monobasic BP USP NF ACS FCC Food gradeManufacturers
Di Dipotassium Dibasic Potassium Phosphate Dibasic BP USP NF ACS FCC Food grade Manufacturers
Tri Tripotassium Tribasic Potassium Phosphate Tribasic BP USP NF ACS FCC Food grade Manufacturers:

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