L(-)-Cystine 99%

Synonyms: (2R,2'R)-3,3'-Disulfanediylbis(2-aminopropanoic acid)(2R,2'R)-3,3'-Disulphanediylbis(2-aminopropanoic acid)(H-Cys-OH)2(R)-(-)-Cystine

AC11180-1000
200006-806EA 132.09 USD
200006-806
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
Storage Temperature: Ambient
MDL Number: MFCD00064228
CAS Number: 56-89-3
EINECS: 200-296-3
Merck Index: 13,02811

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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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