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1,Formula: Anhydrous CaHPO4 ; DihydrateCaHPO4·2H2O
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-V |
E 341 (ii) |
| Description |
White crystal or granular, granular powder or powder |
| Assay ,% |
97.0-105.0 |
98.0--102.0(200℃, 3hours) |
| P2O5 Content(Anhydrous basis) ,% |
-- |
50.0--52.5 |
| Identification |
-- |
Positive tests for calcium and for phosphate |
| Solubility tests |
-- |
Sparingly soluble in water.
Insoluble in ethanol |
| Fluoride, ≤mg/kg |
50 |
50 |
| Loss on ignition, (After ignition at 800℃±25℃ for 30minutes) |
7.0-8.5% (Anhydrous)
24.5-26.5% (Dihydrate) |
≤8.5%(Anhydrous)
≤26.5%(Dihydrate) |
| Arsenic, ≤mg/kg |
3 |
3 |
| Lead, ≤mg/kg |
2 |
4 |
| Cadmium, ≤mg/kg |
-- |
1 |
| Mercury, ≤mg/kg |
-- |
1 |
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