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L-Leucine
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L-Leucine
(S)-2-Amino-4-methylvaleric acid |
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C6H13NO2: 131.17 |
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CAS No.61-90-5 |
Nitrogen: 10.68% |
| L-Leucine, when dried, contains not less than 98.5 percent and not more
than101.0 percent of L-Leucine (C6H13NO2). |
| Description: |
White crystals or crystalline powder; slightly bitter taste.
Freely soluble in formic acid, sparingly soluble in water,
practically insoluble in ethanol and in either.
Dissolves in dilute hydrochloric acid.
Solubility (H2O, g/100g):
2.38(20˚C), 2.63(40˚C), 3.19(60˚C), |
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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 |
+14.9˚ to +16.0˚ |
|
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 0.20% |
|
Residue on ignition
(Sulfated) |
Not more than 0.10% |
| Assay |
98.5 to 101.0% |
| PH |
5.5 to 6.5 |
☆☆☆
Recommended storage limit and condition: Preserved in tight
containers at controlled room temperature (2 year). |
