CAS number : 10039-32-4
Molecular weight :358.14
Molecular formula/chemical symbol :Na2HPO4.12H2O
Description :
Apearances: Colorless columnar crystals. Soluble in water, its solution is slightly alkaline, 1% aqueous solution pH of 8.8 to 9.2, and insoluble in alcohol. The 35.1 ℃ melting and crystallization of water lost five. Lost all water of crystallization from anhydrous air easily weathered, the heptahydrate material lost about five crystal water at room temperature when placed in the air, when heated to 100 ° C, 250 ℃ decomposition into sodium pyrophosphate. Below 34 ℃ careful sulfate, disodium hydrogen phosphate dihydrate can be obtained as a white powder. Solubility in water: 218 g / L (20 ° C).
USES :
Analysis
is used as a buffer prepared leptospirosis medium, the determination of
potassium.
Keywords:Surface treatment chemicals
Report :
|
TEST ITEMS |
TEST RESULT |
||
|
|
(GR) |
(AR) |
(CP) |
|
Na2HPO4.12H2O |
≥99.0 |
99.0 |
98.0 |
|
Aqueous reaction |
Qualified |
Qualified |
Qualified |
|
Clarity Test |
Qualified |
Qualified |
Qualified |
|
Water insoluble matter |
≤0.005 |
0.005 |
0.01 |
|
Chloride (Cl) |
≤0.0005 |
0.001 |
0.003 |
|
Sulfate (SO4) |
≤0.005 |
0.01 |
0.03 |
|
Nitrogen compound (N) |
≤0.001 |
0.002 |
0.005 |
|
K |
≤0.005 |
0.01 |
0.1 |
|
Fe |
≤0.0005 |
0.0005 |
0.001 |
|
As |
≤0.00005 |
0.0005 |
0.002 |
|
Heavy metals (as Pb) |
≤0.0005 |
0.0005 |
0.001 |
