MONOSODIUM PHOSPHATE ANHYDROUS
Chemical formula: NaH2PO4
Molecular weight: 119.98
Properties: White powder or white crystal, the melting point is 190 centigrade. It is soluble in water showing acidity. It decompounds sodium pyrophosphate anhydrous at 225-250 centigrade, and becomes sodium metaphosphate at 350-400 centigrade. It is slightly
hygroscopic
.
Standard executed: HG/T 2767-2009 and GB 34456-2017(feed grade)
Sepcification | Tech grade | High purity grade | Feed grade | |
Appearance | White or colorless crystal | |||
Main contents | %≥ | 98.00 | 98.00 | 98.0-103.0 |
P2O5 | %≥ | 58.00 | 58.00 | – |
Water insoluble | %≤ | 0.2 | 0.2 | 0.2 |
Arsenic, as As | %≤- | 0.01 | 0.0003 | 0.001 |
Heavy metal, as Pb | %≤ | 0.005 | 0.001 | 0.003 |
Lead, as Pb | %≤ | – | 0.0004 | – |
Fluoride , as F | %≤ | 0.05 | 0.005 | 0.005 |
Iron , as Fe | %≤ | 0.05 | – | – |
Sulphates, as SO42 | %≤ | 0.5 | – | – |
Chloride, as Cl- | %≤ | 0.4 | – | – |
PH value of 1% solution |
| 4.2-4.6 | 4.1-4. 7 | 4.0-5.0 |
Loss on drying | %≤ | 2.0 | 2.0 | – |
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