L(-)-Cystine 98.5-101.5% (dried basis) FCC for biopharmaceutical production, SAFC®
: (R)-(-)-Cystine, (2R,2'R)-3,3'-Disulphanediylbis(2-aminopropanoic acid), (H-Cys-OH)2
:56-89-3
:
:HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH
:MFCD00064228
:240.3 g/mol
:13,02811
:428 °C (1013 hPa)
:261…262 °C (dec.)
:1.677 g/cm³ (20 °C)
:Ambient
:200-296-3
- Environmentally Preferable:
- 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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