L(-)-Cystine 98.5-101.5% (dried basis) FCC for biopharmaceutical production, SAFC®
Supplier: MERCK PRODUCTION CHEMICALS
Synonyms:
(R)-(-)-Cystine, (2R,2'R)-3,3'-Disulphanediylbis(2-aminopropanoic acid), (H-Cys-OH)2
1.02836.1000
1.02836.9029
1.02836.1000EA
698
GBP
1.02836.1000
1.02836.9029
L(-)-Cystine 98.5-101.5% (dried basis) FCC for biopharmaceutical production, SAFC®
L(-)-Cystine
Formula:
HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH MW: 240,3 g/mol Boiling Pt: 428 °C (1013 hPa) Melting Pt: 261…262 °C (dec.) Density: 1,677 g/cm³ (20 °C) Storage Temperature: Ambient |
MDL Number:
MFCD00064228 CAS Number: 56-89-3 EINECS: 200-296-3 Merck Index: 13,02811 |
Specification Test Results
Assay (ex N, calc. on dried substance) | 98.5 - 101.5 % |
Identity (IR-spectrum) | Passes Test |
Appearance | White to almost white, fine-crystalline powder |
Appearance of solution (100 g/l, hydrochloric acid 2 mol/l) | Clear and Colorless |
Spec. Rotation (α20/D, 20 g/l, Hydrochloric Acid 1 mol/l, Previously Dried Substance) | –215 to –225 |
Heavy Metals (as Pb) | ≤10 ppm |
Pb (Lead) | ≤5 ppm |
Ninhydrin - Positive Substances (LC) (Largest Single Impurity) | ≤0.2 % |
Ninhydrin - Positive Substances (LC) (Sum of all Impurities) | ≤0.5 % |
Sulfated Ash (800 °C) | ≤0.1 % |
Loss on Drying (105 °C; 3 h) | ≤0.2 % |
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