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Dicalcium Phosphate Dihydrate (Dental Grade)
1． Chemical name: Dicalcium Phosphate Dihydrate，Calcium Hydrogen Phosphate
2． M. F.: CaHPO4.2H2O
3． M. W.: 172.09
4． Physical properties: white crystal powder, it is soluble in diluted Hydrochloric Acid and Nitric Acid, slightly soluble in water, insoluble in ethanol, it may lose water and convert to Dicalcium Phosphate Anhydrous at 65℃.
5． Quality standard :( QB/T2477-2007)
TEST ITEMS |
QB/T2477-2007 |
Assay |
98.5% min |
P2O5 |
40.5%-42.0% |
CaO |
32.0% min |
Whiteness |
95.0% min |
PH (20%) |
7.0-8.1 |
|
Particle size (325 mesh) (200 mesh) |
99% min 99.95% min |
Apparent density |
0.8-1.0g/ml |
Water adsorption |
5.0-6.5ml/20g |
Stability |
Pass test |
Fast test of stability of fluorine ion |
0.9% min |
Loss on ignition |
25.0%-26.5% |
Loss on drying |
0.60% max |
Heavy metals (as Pb) |
0.002% max |
Fluoride |
0.005% max |
Chloride |
0.03% max |
Sulfate |
Pass test |
Sulfide |
Pass test |
As |
0.0003% max |
Carbonate |
Pass test |
Fe |
0.005% max |
Insoluble in HCl |
0.2% max |
Total plate count |
100cfu/g max |
Total molds |
500cfu/g max |
6. Usage: In daily chemicals, it is applied as friction agent to produce high-grade toothpaste.
7. Packing: In 25kg composite plastic woven/paper bag with PE liner.
8. Storage and transport: It should be stored in a dry and ventilated warehouse and kept away from water and moisture during transport and stored separately from poisonous substances. Handled with care, so as to avoid damage to packing bags.
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