51-35-4 L-羟基脯氨酸
Item
Standard
Analysis data
Appearance
Off-White crystals or crystalline powder
Conforms
Specific rotation(a)D20
-74.0o to –77.0o
-74.19
Transmittance
Not less than 95.0%
96.4%
Chloride(C1)
Not more than 0.02%
<0.02%
Ammonium(NH4)
Not more than 0.02%
<0.02%
Sulfate (SO4)
Not more than 0.02%
<0.02%
Heavy metals(Pb)
Not more than 10ppm
<10ppm
Iron(Fe)
Not more than 10ppm
<10ppm
Arsenic(As2O3)
Not more than 1 PPM
<1ppm
Other Amino Acids
Conforms
Conforms
Loss on drying
Not more than 0.20%
0.15%
Residue on ignition
Not more than 0.1%
0.09%
Assay
98.5-101.0%
99.1%
PH
5.0～6.5
5.4
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