Description
Product Name: L-Cystine
CAS Number: 56-89-3; EC Number: 200-296-3
Chemical Formula: C6H12N2O4S2
Molecular Weight: 240.2918
Synonyms: 2S,7S)-(-)-Cystine;
3,3'-Dithiobis(2-aminopropionic acid);
Specification:
|
Appearance: |
White crystalline powder |
|
Assay[dry basis]: |
98.5% to 101.0% |
|
Specific rotation [α]D20: |
-215º~-225º |
|
State of solution: |
Clear and colorless |
|
Transmittance: |
98.0% min. |
|
Loss on drying |
0.20% max. |
|
PH: |
5.0~6.5 |
|
Residue on ignition [sulfated]: |
0.10% max. |
|
Chloride [Cl-]: |
16.6% to 17.0% |
|
Ammonium [NH4+]: |
0.020% max. |
|
Sulfate [SO4]: |
0.020% max. |
|
Iron [Fe]: |
10ppm max. |
|
Heavy metals [Pb]: |
10ppm max. |
|
Arsenic [As2O3]: |
1ppm max. |
|
Other amino acids: |
Chromatographically not detectable |