L(-)-Proline 99+%
Supplier: Thermo Scientific
ACRO157625000EA
572
EUR
ACRO157625000
ACRO157620050
ACRO157620250
ACRO157621000
L(-)-Proline 99+%
L(-)-Proline
Specification Test Results
Appearance | White Crystalline powder or crystals |
Infrared spectrum | Conforms |
Loss on drying | ≤0.3 % (105°C, 3 hrs) |
Sulfated ash | ≤0.1 % |
UV transmittance | ≥95 % (c=10, H2O, 430 nm) 1 cm cell |
pH | 5.5 to 7 (2.5 % at 25°C) |
Specific optical rotation | -84.5° to -86.8° (20°C, 589 nm) (c=4, H2O) |
Titration with HClO4 | 99.0 to 101.0 % |
Chloride (Cl) | ≤200 ppm |
Sulfate (SO4) | ≤200 ppm |
Ammonium (NH4) | ≤200 ppm |
Arsenic (As) | ≤1 ppm |
Iron (Fe) | ≤10 ppm |
Heavy metals (as Pb) | ≤10 ppm |
Other amino acids | ≤0.5 % (TLC) |
Heavy metals (as Pb) | ≤5 ppm |
Insoluble matter | ≤0.005 % (in water) |
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