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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℃.
Quality standards
( QB/T2477-2007)
TEST ITEMS
STANDARD PARAMETERS
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
Uses
In daily chemicals, it is applied as friction agent to produce high-grade toothpaste.
Packing
In 25kg composite plastic woven/paper bag with PE liner.
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.
One year of qualification
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