Appearance: | Powder |
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Grade Standard: | Reagent Grade |
Purity: | 99.69% |
Water Content: | 0.35% |
Dry Weight Loss: | 0.42% |
pH Value: | 4.35 |
Samples: |
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Customization: |
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Point of melting: | 150-155 °C |
Density : | 1.210 (estimate) |
Pressure of vapor: | 0.001Pa at 25ºC |
Index of refraction: | 1.5500 (estimate) |
Storage conditions: | room temp |
Degree of solubility | H2O:1 Mat 20 °C,Transparent and colorless |
form | White powder |
PH value: | 2.5-5.0 (25ºC, 1M in H2O) |
Acid-base indicator discoloration ph range: | 6.4 - 7.8 |
Coefficient of acidity (pKa): | 7.1(at 25ºC) 7.15(at 20ºC) |
Solubility of water | Soluble |
Specification Properties |
Specification of standard |
Result of Analysis |
(Appearance) |
||
(Assay) |
99.0%-101.0% | 99.69% |
Water Content) | ≤0.5% | 0.35 |
loss on drying | ≤1% | 0.42 |
solubility (1.0M aqueous) |
, | , |
PH value (1.0M aqueous) |
2.5-5.0 | 4.35 |
Pb | ≤0.0005 | 0.0002 |
Ultraviolet absorbance/280nm | ≤0.05 | 0.03 |
Ultraviolet absorbance/290nm | ≤0.03 | 0.02 |
Conclusion: Passe |
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