L(-)-Cystine, meets analytical specification of Ph.Eur.
Supplier: Thermo Scientific
Synonyms:
(R)-(-)-Cystine, (2R,2'R)-3,3'-Disulphanediylbis(2-aminopropanoic acid), (H-Cys-OH)2
406160010
406160250
406161000
ACRO406160010EA
927
GBP
ACRO406160010
ACRO406160250
ACRO406161000
L(-)-Cystine, meets analytical specification of Ph.Eur.
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 |
Specification Test Results
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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