L(-)-Cystin, erfüllt analytische Spezifikationen von Ph.Eur.
Lieferant: Thermo Scientific
Synonyme:
(2R,2'R)-(-)-3,3'-Dithiobis(2-aminopropansäure)
, (R)-(-)-Cystin
, (H-Cys-OH)2
ACRO406161000EA
91.2
EUR
ACRO406161000
ACRO406160010
ACRO406160250
L(-)-Cystin, erfüllt analytische Spezifikationen von Ph.Eur.
L(-)-Cystin
Formel:
HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH Molecular Weight: 240,3 g/mol Siedepunkt: 428 °C (1013 hPa) Schmelzpunkt: 260…261 °C Lagertemperatur: Raumtemperatur |
MDL:
MFCD00064228 CAS-Nummer: 56-89-3 |
Spezifikation Testergebnisse
Appearance | White to almost white Crystalline powder |
Infrared spectrum | Conforms |
Loss on drying | ≤0.5 % (1 g, 105°C) |
Sulfated ash | ≤0.1 % (1 g) |
Appearance of solution | Clear and not more intensely coloured than reference solution Y7 |
Specific optical rotation | -218° to -224° (20°C, 589 nm) (c=2, 1M HCl) (On dried substance) |
Titration | 98.5 to 101.0 % (On dried substance) |
Sulfates | ≤300 ppm |
Chlorides | ≤200 ppm |
Ammonium (NH4) | ≤200 ppm |
Iron (Fe) | ≤10 ppm |
Ninhydrin-positive substances | Passes test |
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