L(-)-Cystine 99%
Supplier: Thermo Scientific
Synonyms:
(R)-(-)-Cystine, (2R,2'R)-3,3'-Disulphanediylbis(2-aminopropanoic acid), (H-Cys-OH)2
111801000
111800025
111805000
ACRO111801000EA
154
GBP
ACRO111801000
ACRO111800025
ACRO111805000
L(-)-Cystine 99%
L(-)-Cystine
Formula:
HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH MW: 240,3 g/mol Boiling Pt: 428 °C (1013 hPa) Melting Pt: 260…261 °C 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
Appearance | White to almost white Crystalline powder or crystals |
Infrared spectrum | Conforms |
Loss on drying | ≤0.5 % (1 g, 105°C, 3 h) |
Sulfated ash | ≤0.1 % |
Specific optical rotation | -210° to -224° (20°C, 589 nm) (c=2, 1 M HCl) (on dried substance) |
Titration excess NaOH | ≥98.5 % (On dried substance) |
Chloride (Cl) | ≤200 ppm |
Sulfate (SO4) | ≤300 ppm |
Ammonium (NH4) | ≤200 ppm |
Iron (Fe) | ≤10 ppm |
Heavy metals (as Pb) | ≤10 ppm |
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