Dicalcium Phosphate Anhydrous
1,Formula: Anhydrous CaHPO4 ; Dihydrate CaHPO4·2H2O
2,Formula wt, anhydrous 136.06
Formula wt, dihydrate 172.09
3,CAS: anhydrous [7757-93-9]; CAS: dihydrate [7789-77-7]
4,Specificity: white monoclinic crystalline powder, odorless, soluble in diluted hydrochloric acid, nitric acid, acetic acid, slightly soluble in water, insoluble in ethanol. relative density: 2.32.
5, Packing: 25kg net paper bag or 1mt big bag with PE liner.
Name of index |
FCC-IV |
E 341(i) |
Content(As Ca), % |
15.9-17.7 (Monohydrate) 16.8-18.3 (Anhydrous) |
Assay (On the dried basis), ≥95% |
P2O5 Content(Anhydrous basis) ,% |
-- |
55.5—61.1 |
Description |
-- |
Granular powder or white, deliquescent crystals or granules |
Identification |
-- |
Positive tests for calcium and for phosphate |
CaO content ,% |
-- |
19.0—24.8 |
As, ≤mg/kg |
3 |
3 |
F, ≤mg/kg |
50 |
30 |
Lead, ≤mg/kg |
2 |
4 |
Cadmium, ≤mg/kg |
-- |
1 |
Mercury, ≤mg/kg |
-- |
1 |
Loss on drying, ≤% |
1(Monohydrate) |
Monohydrate:60°C,1hour then 105°C,4 hours,≤17.5% Anhydrous:105°C,4hours,≤14% |
Loss on ignition |
14.0—15.5(Anhydrous) |
Monohydrate:105°C,1hour then ignite at 800°C±25°C for 30minutes,≤25.0% Anhydrous: ignite at 800°C±25°C for 30minutes,≤17.5% |
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