Disodium hydrogenphosphate
Key words:
Disodium hydrogenphosphate
Classification:
- Details
-
Name: Disodium hydrogen phosphate (dodecahydrate, heptahydrate, anhydrous, dihydrate)
CAS No.: 10039-32-4(7782-85-6,7558-79-4)
Specification: excellent pure, analytical pure, chemical pure, cosmetic grade, electronic grade
Molecular Formula:Na2HPO4•12H2O
Product properties
Colorless transparent monoclinic prismatic crystals, relative density 1.52, easy to weather in the air, very easy to lose five molecules of water of crystallization and form heptahydrate (Na2HPO4.7H2O). Soluble in water, insoluble in alcohol. Aqueous solution is slightly alkaline reaction (0.1-1N solution PH is about 9.0). Loses water of crystallization and becomes anhydrous at 100℃, and decomposes into sodium pyrophosphate at 250℃.
Technical indicators
Specification
Superior Pure GR
Analytical Pure AR
Chemically Pure CP
Analytically pure (anhydrous)
Chemically pure (anhydrous)
Analytically pure
(dihydrate)Electronics grade
Content 99.0
≥99.0%
≥99.0%
≥99.0%
≥99.0%
99.0% ~100.5%
Customized according to customer requirements
Aqueous solution reaction -
Conformity
Conformity
-
-
-
PH
-
-
-
8.7-9.3
8.7-9.3
8.8-9.4
Loss of weight on drying -
-
-
-
-
18.5%-21.5%
Clarity test Conformity
Conformity
Conformity
Conformity
Conformity
-
Water insoluble matter 0.005
≤0.005%
≤0.05%
≤0.01%
≤0.02%
≤0.1%
Chloride 0.0005
≤0.001%
≤0.001%
≤0.002%
≤0.004%
≤0.06%
Sulfates 0.005
≤0.01%
≤0.01%
≤0.005%
≤0.010%
≤0.05%
Nitrogen compounds 0.001
≤0.002%
-
-
-
-
Total nitrogen content
-
-
-
≤0.002%
≤0.003%
-
K
0.005
≤0.01%
≤0.01%
-
-
-
Fw
0.0005
≤0.0005%
≤0.005%
≤0.002%
≤0.004%
≤0.001%
Ad
0.00005
≤0.0005%
≤0.0005%
≤0.0001%
≤0.0002%
≤0.001%
Heavy metal
0.0005
≤0.0005%
≤0.005%
≤0.001%
≤0.002%
≤0.001%
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