TRISODIUM PHOSPHATE ANHYDROUS
1,Formula : anhydrous Na3PO4; dodecahydrate Na3PO4·12H2O
2,Formula wt: anhydrous 163.94; dodecahydrate 380.12
3,CAS: anhydrous [7601-54-9]; dodecahydrate [10101-89-0]
4,Einecs: 231-509-8
5,Specificity: Sodium Phosphate, Tribasic, occurs as white crystals or granules or as a crystalline material. It may be anhydrous or contain 1 to 12 molecules of water of hydration. The formula for a crystalline material is approximately 4(Na3PO4·12H2O)-NaOH. It is freely soluble in water, but is insoluble in alcohol.
The pH of a 1:100 aqueous solution is between 11.5 and 12.5.
6,H.S. Code: 28352910 CIQ Checking: Statutory Inspection
Name of index |
|
FCC-V |
E339(iii) |
Description |
|
White odourless crystals, granules or crystalline powder |
|
Identification |
|
Pass test |
|
Solubility |
|
-- |
Freely soluble in water. Insoluble in ethanol |
pH of a 1 % solution |
|
-- |
11.5-12.5 |
Assay |
≥% |
1,Anhydrous 97.0 (ignited basis) 2,Dodecahydrate:90.0(ignited basis) |
1,Anhydrous 97.0(dried basis) 2,Dodecahydrate:92.0 (ignited basis) |
P2O5 Content |
% |
-- |
40.5-43.5(Anhydrous basis) |
Water insoluble(Anhydrous basis) |
≤% |
0.2 |
0.2 |
Fluoride |
≤% |
0.005 |
0.001(expressed as fluorine) |
Loss on Ignition |
|
1,Anhydrous:≤2.0%; 2,Dodecahydrate:45.0-57.0%. |
1,Anhydrous:≤2.0%, 2,Dodecahydrate:45.0 -58.0 % (120℃,2h then 800℃,30m) |
As, |
≤mg/kg |
3 |
1 |
Cadmium ≤% |
≤mg/kg |
-- |
1 |
Mercury ≤% |
≤mg/kg |
-- |
1 |
Lead, ≤% |
≤mg/kg |
4 |
1 |
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