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 |