NILE 
CHEMICALS
DL - TRYPTOPHAN
| 
         SPECIFICATION  | 
    |
| Suitable for bacteriology and tissue | |
| culture | |
| C11H12N2O2 M.W. 204.23 | |
| Assay ( HCIO4 titration ) minimum | 99% | 
| Heavy metals ( as Pb ) maximum | 0.001% | 
| Thin - layer chromatogram | passes test | 
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