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| Item | STANDARD |
| Specific rotatory power[α] D20 | -215º -225º |
| Clarity | >= 98.0% |
| Ammonium salt[NH4] | =< 0.02% |
| Chloride[CL] | =< 0.02% |
| Residue on ignition | =< 0.10% |
| Sulfate[SO4] | =< 0.02% |
| Iron salt[Fe] | =< 10 ppm |
| Heavy metal[Pb] | =<10 ppm |
| Arsenic salt | =<1 ppm |
| Other amino acid | Color layer can not be checked out. |
| Loss on drying | 0.20% |
| Content | 98.5 -101.0% |
