item |
specification |
specific rotation |
+39.5 to +41.5° |
state of solution(transmittance) |
clear 98.0% min. |
chloride[cl] |
0.020% max. |
ammonium [nh4] |
0.02% max. |
sulfate[so4] |
0.020% max |
iron[fe] |
10ppm max. |
heavy metals [pb] |
10ppm max |
arsenic[as2o3] |
1ppm max |
other amino acids |
chromatographically not detectable |
loss on drying |
0.20% max. |
residue on ignition[sulfated] |
0.10% max. |
assay |
99.0% min |