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Sodium Hexametaphosphate
Chemical Name: Sodium Hexametaphosphate
Molecular Formula: (NaPO3)6
Molecular Weight: 611.77
CAS: 10124-56-8
Character: White crystal powder, density is 2.484 (20°C), easily soluble in water, but nearly insoluble in organic solution, it is absorbent to dampness in the air. It easily chelates with metallic ions, such as Ca and Mg.
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Sodium Aluminium Phosphate
Chemical Name: Sodium Aluminium Phosphate
Molecular Formula: acid: Na3Al2H15(PO4)8, Na3Al3H14(PO4)8·4H2O;
alkali：Na8Al2(OH)2(PO4)4
Molecular Weight: acid: 897.82, 993.84，alkali: 651.84
CAS: 7785-88-8
Character: White powder
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Sodium Trimetaphosphate
Chemical Name: Sodium Trimetaphosphate
Molecular Formula: (NaPO3)3
Molecular Weight: 305.89
CAS: 7785-84-4
Character: White powder or granular in appearance. Soluble in water, insoluble in organic solvent
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Tetrasodium Pyrophosphate
Chemical Name: Tetrasodium Pyrophosphate
Molecular Formula: Na4P2O7
Molecular Weight: 265.90
CAS: 7722-88-5
Character: White monoclinic crystal powder, it is soluble in water,insoluble in ethanol. Its water solution is alkalic. It is liable to deliquesce by moisture in the air.
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Trisodium Phosphate
Chemical Name: Trisodium Phosphate
Molecular Formula: Na3PO4，Na3PO4·H2O, Na3PO4·12H2O
Molecular Weight: Anhydrous: 163.94; Monohydrate: 181.96; Dodecahydrate: 380.18
CAS: Anhydrous: 7601-54-9; Dodecahydrate: 10101-89-0
Character: It is colorless or white crystal, powder or crystalline granule. It’s odorless, easily soluble in water but insoluble in organic solvent. The Dodecahydrate lose all crystal water and become Anhydrous when temperature rise to 212 ℃. Solution is alkaline, slightly corrosion on skin.
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Trisodium Pyrophosphate
Chemical Name: Trisodium Pyrophosphate
Molecular Formula: Na3HP2O7 (Anhydrous), Na3HP2O7·H2O(Monohydrate)
Molecular Weight: 243.92(Anhydrous), 261.92(Monohydrate)
CAS: 14691-80-6
Character: White powder or crystal
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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.
