|
L-Glutamic
acid
|
|
L-Glutamic acid
(S)-2-Aminoglutaric acid |
 |
|
C5H9NO4: 147.13 |
|
CAS No.56-86-0 |
Nitrogen: 9.52% |
| L-Glutamic acid, when dried, contains not less than 98.5 percent and not
more than100.5 percent of L-Glutamic acid (C5H9NO4) |
| Description: |
White crystals or crystalline powder; slightly characteristic taste and
acid taste.
Freely soluble in formic acid, slightly soluble in water,
practically soluble in ethanol and in either.
Dissolves in dilute hydrochloric acid and in dilute nitric
acid.
Solubility (H2O, g/100g):
0.7220˚C), 1.51(40˚C), 3.17(60˚C) |
|
Identification:
|
Compare the infrared absorption spectrum of the sample with that of the
standard by potassium bromide disc method.
|
| Specifications: |
| Item |
Limit |
| Specific rotation [α]
20D |
-+31.5˚ to +32.4˚ |
|
State of solution
(Transmittance) |
Clear
and colorless
Not less than 98.0% |
| Chloride (Cl) |
Not more than 0.020% |
| Ammonium (NH4) |
Not more than 0.02% |
| Sulfate (SO4) |
Not more than 0.020% |
| Iron (Fe) |
Not more than 10PPm |
| Heavy metals (Pb) |
Not more than 10PPm |
| Arsenic (As2O3) |
Not more than 1PPm |
| Other amino acids |
conforms |
| Loss on drying |
Not more than 0.10% |
|
Residue on ignition
(Sulfated) |
Not more than 0.10% |
| Assay |
99.0 to 101.0% |
| PH |
3.0 to 3.5 |
☆☆☆
Recommended storage limit and condition: Preserved in tight
containers at controlled room temperature (2 year). |
