DICALCIUM PHOSPHATE (DENTAL GRADE )
1. CHEMICAL NAME: DICALCIUM PHOSPHATE
DIHYDRATE
2. FORMULAR: CaHPO4.2H2O
3. MOLECULAR WEGHT:172.09
4. SPECIFITY:
White, monoclinic crystalline powder; soluble in dilute Hydrochloric,
Nitric and acetic acids, slightly soluble in water , insoluble in
ethanol, when heated to 75 ,
it may lose crystal water, convert to Anhydrous.
5. Quality standard:
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Name of index
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HG3257-1990
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According to the contract ZA2002
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Fine grade
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Grade1
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Stability
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Accord with the test
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|
Accord with the test
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PH value(20% turbid liquid)
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7.6-8.3
|
7.6-8.3
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6.9-8.1
|
|
Loss on ignition,%
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24.5-26.5
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24.5-26.5
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24.5-26.5
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Carbonate
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Accord with the test
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Accord with the test
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Accord with the test
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|
Fineness(passing through 45Umtest sieving), %
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97.0
|
95.0
|
99.0
|
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Sulfides
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Accord with the test
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Accord with the test
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Accord with the test
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Chlorides(Cl),  %
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0.03
|
0.03
|
0.03
|
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Absorptive water capacity(ml/20g)
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5.0-6.5
|
4.5-6.5
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4.5-6.5
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Content( As CaO)%
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32.0-33.0
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31.5-33.0
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31.4-32.9
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As,%
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0.0005
|
0.0001
|
0.0001
|
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Heavy metals(As Pb), %
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0.003
|
0.001
|
0.001
|
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Fluoride (As F), %
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0.005
|
0.005
|
0.005
|
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Degree of whiteness,
|
95
|
95
|
95
|
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P2O5,%
|
|
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40.7-42.5
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Content,%
|
|
|
98.5 min
|
|
60 D.C. Water Loss
|
|
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0.6 pct. max
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Titration value
|
|
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57-61ml
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|
Set Test
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|
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Pass Test
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Acid Insolubles,%
|
|
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0.2 max
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6. USES:
In daily chemical industry, it is used as frictional agent for
making top quality tooth paste, especially foaming type tooth paste.
7. PACKING:
25kgs net paper bags or 25kgs or 1000kgs plastic woven bags
8. STORAGE and transport:
It should be stored in a dry, Ventilative and clear warehouse;
kept away from moisture and hot, Furthermore, it should be stored
separately from poisonous substances.
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