1, Formula: anhydrous Ca(H2PO4)2 ; monohydrate Ca(H2PO4)2·H2O
2, Formula wt: anhydrous 234.05
Formula wt: monohydrate 252.07
3, CAS: anhydrous [7758-23-8];CAS: monohydrate [10031-30-8]
4, Specificity: White crystalline powder, or plate crystal specific gravity 2.220,when heated to 100℃,it may loss crystal water. Soluble in acid, has hygroscopicity, acidic property appeared in a aqueous solution.
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℃,1hour then 105℃,4 hours,≤17.5%
Anhydrous:105℃,4hours,≤14% |
| Loss on ignition |
14.0—15.5(Anhydrous) |
Monohydrate:105℃,1hour then ignite at 800℃±25℃ for 30minutes,≤25.0%
Anhydrous: ignite at 800℃±25℃ for 30minutes,≤17.5% |
|
