1,Formula : NaH2PO4; NaH2PO4·H2O
2,Formula wt, anhydrous 119.98
Formula wt, monohydrate 137.99
3,CAS: anhydrous [7558-80-7]; CAS: monohydrate [10049-21-5]
4,Einecs: 231-449-2
5,Specificity: Odourless, colourless crystals or white granular or crystalline powder, hygroscopic, and melting point is at 190℃.Easily soluble in water, insoluble in ethanol.
6,H.S. Code: 28352200 CIQ Checking: Non Statutory Inspection
Name of index |
| FCC-V | E339(i) |
Description |
| A white odourless, slightly deliquescent powder, crystals or granules | |
Identification |
| Pass test | Pass test |
Solubility |
| -- | Freely soluble in water. Insoluble in ethanol or ether |
pH of a 1 % solution |
| -- | 4.1—5.0 |
Content, | % | 98.0—103 (as dry base) | ≥97,(60℃ 1h then 105℃ 4h) |
P2O5 Content | % | -- | 58.0-60.0(Anhydrous basis) |
Lead, | ≤mg/kg | 4 | 1 |
Water insolubles | ≤% | 0.2 | 0.2(Anhydrous basis) |
Fluoride | ≤% | 0.005 | 0.001 (expressed as fluorine) |
Loss on drying, |
| 1,Anhydrous ≤2.0% 2,Monohydrate:10.0-15.0%; 3,Dihydrate: 20.0-25.0% | 1,Anhydrous ≤2.0%, 2,Monohydrate ≤15.0%, 3,Dihydrate ≤25% (60℃ 1h then 105℃ 4h) |
As | ≤mg/kg | 3 | 1 |
Cadmium | ≤mg/kg | -- | 1 |
Mercury | ≤mg/kg | -- | 1 |
