L-Cystine Disodium -- CAS No: 64704-23-0, 199329-53-8
| CAS Registry Number |
64704-23-0, 199329-53-8 |
| Name |
L-Cystine Disodium Salt |
| Synonyms |
|
| Molecular Formula |
C6H10N2OS2Na2 |
| Molecular Weight |
302.30 |
| Molecular Structure |
 |
| Test |
C7123, Ultra Pure |
C7125, Ultra BioPure |
| Appearance |
White to off white powder |
White to off white powder |
| Assay (by titration, on dried basis) |
≥ 98.0% |
≥ 98.0% |
| Solubility (1% solution in H2O) |
Clear, complete and colorless | Clear, complete and colorless |
| Identification (by IR) |
Conforms to structure | Conforms to structure |
| Specific Rotation |
-168.5º to -176.9º |
-168.5º to -178.9º |
| Loss on Drying (110°C for 3 hours) |
≤ 6.6% | ≤ 6.6% |
| Water (KF) |
≤ 8.0% | ≤ 8.0% |
| pH (1% solution in water) |
9.5 – 11.0 | 9.5 – 11.0 |
| Heavy Metals (Lead) |
≤ 0.0020% | ≤ 0.0020% |
| Biological Impurity Testing |
| Test |
C7123, Ultra Pure |
C7125, Ultra BioPur |
| Endotoxin (0.1% solution in H2O) |
-- |
≤ 0.04 EU/mL |
| Bioburden |
-- |
≤ 100 CFU/g |
| Specification Sheet |
| Specification Sheet |
 |
|
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