DISODIUM PHOSPHATE ANHYDROUS
1,Formula: Na2HPO4; Na2HPO4·2H2O
2,Formula wt: anhydrous 141.96; dihydrate 177.99
3,CAS: anhydrous [7558-79-4]; CAS: dihydrate [10028-24-7]
4,Einecs: 231-448-7
5,Specificity: Colorless crystal, easily soluble in water, insoluble in ethanol, relative density 1.63,melting point 34.6℃,when heated to 180℃,it may lose crystal water, convert to anhydrous.
6,H.S. Code: 28352200 CIQ Checking: Non Statutory Inspection
Name of index |
|
FCC-V |
E339(ii) |
Identification |
|
Pass test |
Pass test |
Content |
≥% |
98.0(as dry base) |
98.0(40℃,3h then 105℃,5h) |
P2O5 Content ,% |
% |
-- |
49.0-51.0(Anhydrous basis) |
Solubility |
|
-- |
Freely soluble in water. Insoluble in ethanol |
Water insoluble(Anhydrous basis),≤% |
|
0.2 |
0.2 |
pH of a 1 % solution |
|
-- |
8.4—9.6 |
Fluoride, ≤% |
|
0.005 |
0.001(expressed as fluorine) |
Loss on drying, |
|
1,Anhydrous:≤5.0% 2,Dihydrate:18.0%-22.0% (120℃,4h) |
1,Anhydrous ≤5.0%, 2,Dihydrate ≤22.0% (40℃,3h then 105℃,5h)) |
As,≤% |
≤mg/kg |
3 |
1 |
Cadmium ≤% |
≤mg/kg |
-- |
1 |
Mercury ≤% |
≤mg/kg |
-- |
1 |
Lead, % |
≤mg/kg |
4 |
1 |
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