- Food Additives[10]
- Contact Person : Ms. Yu Jane
- Company Name : Zhengzhou Friend Biological Engineering Co., Ltd.
- Tel : 86-371-63969576
- Fax : 86-371-63969610
- Address : Henan,Zhengzhou,BUILDING B,4TH FLOOR,BLOCK D,WARING PLAZA,NO.168.HEALTH ROAD,JINSHUI DISTRICT,ZHENGZHOU,CHINA
- Country/Region : China
- Zip : 450002
L-Methionine
Chemical Name: 2-amino-4-(methylthio)-butyric acid Molecular Formula: C5N11NO2S Molecular Weight: 149.1 Cas No: 63-68-3 Characteristics: White crystals or crystalline powder Quality Standards: USP24, FCCIV, AJI92 Packaging and Storage: In 25kgs fiber drum double polyethylene bags inside; Preserve in well-closed containers, at controlled room temperature. Recommended limit: 1 year.
Item | Specifications | ||
AJI92 | USP24 | FCC IV | |
Description | White crystals or crystalline powder | Colorless or white lustrous plates, or a white crystalline powder, it has slight, characteristic odor. | |
Identification | Infrared absorption spectrum | ||
Specific rotation | +23.0 - +24.0 | +22.4- +24.7 | +21.0- +25.0 |
State of solution(Transmittance) | ≥ 98.0% | --- | Soluble in water, alkali solutions and in dilute mineral acids |
Chloride(CL) | ≤ 0.020% | ≤ 0.05% | --- |
Sulfate(SO4) | ≤ 0.020% | ≤ 0.03% | --- |
Ammonium(NH4) | ≤ 0.02% |
| --- |
Heavy metals(Pb) | ≤ 10PPm | ≤ 0.0015% | ≤ 10ppm |
Lead | --- | --- | ≤ 10mg/kg |
Iron(Fe) | ≤ 10PPm | ≤ 0.003% | --- |
Arsenic(As2O3) | ≤ 1PPm | --- | --- |
Other amino acids | Conforms | --- | --- |
Loss on drying | ≤ 0.20% | ≤ 0.30% | ≤ 0.5% |
Residue on ignition (sulfated) | ≤ 0.10% | ≤ 0.40% | ≤ 0.1% |
Assay | 99.0--- 101.0% | 98.5-101.5% | 98.5-101.5% |
PH | 5.6-6.1 | 5.6-6.1 | --- |
O.V.I | --- | Meet the requirements | --- |
L-Methionine
