|
L-Tryptophan
|
 |
|
C11H12N2O2
204.23
L-Threonine |
|
L-Threonine
[73-22-3] |
| » Threonine
contains not less than 98.5 percent and not more than 101.5
percent of C11H12N2O2, as L-Threonine, calculated on the dried basis. |
|
Packaging and storage— Preserve in well-closed containers.
|
| Identification: Infrared
Absorption. |
| Specific rotation |
between -29.4°and
-32.8° |
| pH |
between 5.5and
7.0 |
| Loss on drying |
not more than
0.3% |
| Residue on ignition |
not more than 0.1% |
| Chloride |
0.05% |
| Sulfate |
0.03% |
| Iron |
0.003% |
| Heavy metals |
0.0015% |
| Organic volatile impurities |
meets the requirements |
| Assay |
not
less than 98.5 percent and
not more than 101.5 percent
of C9H11NO3 |
