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Dipotassium Phosphate
Chemical Name: Dipotassium Phosphate
Molecular Formula: K2HPO4
Molecular Weight: 174.18
CAS: 7758-11-4
Character: It’s colorless or white square crystal granule or powder, easily deliquescent, alkaline, insoluble in ethanol. pH value is about 9 in 1% aqueous solution.
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Monopotassium Phosphate
Chemical Name: Monopotassium Phosphate
Molecular Formula: KH2PO4
Molecular Weight: 136.09
CAS: 7778-77-0
Character: Colorless crystal or white crystalline powder or granule. No smell. Stable in the air. Relative density 2.338. Melting point is 96℃ to 253℃. Soluble in water (83.5g/100ml, 90 degrees C), The PH is 4.2-4.7 in 2.7% water solution. Insoluble in ethanol.
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Potassium Metaphosphate
Chemical Name: Potassium Metaphosphate
Molecular Formula: KO3P
Molecular Weight: 118.66
CAS: 7790-53-6
Character: White or colorless crystals or pieces, sometime white fiber or powder. Odourless, slowly soluble in water, its solubility is according the polymeric of the salt, usually 0.004%. Its water solution is alkaline, soluble in enthanol.
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Potassium Pyrophosphate
Chemical Name: Potassium Pyrophosphate, Tetrapotassium Pyrophosphate(TKPP)
Molecular Formula: K4P2O7
Molecular Weight: 330.34
CAS: 7320-34-5
Character: white granular or powder, melting point at1109ºC, soluble in water, insoluble in ethanol and its aqueous solution is alkali.
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Potassium Tripolyphosphate
Chemical Name: Potassium Tripolyphosphate
Molecular Formula: K5P3O10
Molecular Weight: 448.42
CAS: 13845-36-8
Character: White granules or as a white powder. It is hygroscopic and is very soluble in water. The pH of a 1:100 aqueous solution is between 9.2 and 10.1.
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Tripotassium Phosphate
Chemical Name: Tripotassium Phosphate
Molecular Formula: K3PO4; K3PO4.3H2O
Molecular Weight: 212.27 (Anhydrous); 266.33 (Trihydrate)
CAS: 7778-53-2(Anhydrous); 16068-46-5(Trihydrate)
Character: It’s white crystal or granule, odorless, hygroscopic. Relative density is 2.564.
