L(-)-Cystine 99%

: Thermo Fisher Scientific

L(-)-Cystine 99%

: Thermo Fisher Scientific

:56-89-3

:

:HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH

:MFCD00064228

:240.3 g/mol

:13,02811

:428 °C (1013 hPa)

:260…261 °C

:1,677 g/cm³ (20 °C)

:Ambient

:200-296-3

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

ACRO11180

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