L-Cystein
Bezeichnung:L-Cystein
CAS-Nr52-90-4
Englisch Name:L-Cysteine
CBNumberCB7388480
SummenformelC3H7NO2S
Molgewicht121.16
MOL-Datei52-90-4.mol
Synonyma
L-Cystein
L-Cystein physikalisch-chemischer Eigenschaften
Schmelzpunkt | 240 °C (dec.) (lit.) |
Siedepunkt | 293.9±35.0 °C(Predicted) |
alpha | 8.75 º (c=12, 2N HCl) |
Dichte | 1.197 (estimate) |
Brechungsindex | 8.8 ° (C=8, 1mol/L HCl) |
FEMA | 3263 | L-CYSTEINE |
storage temp. | Store below +30°C. |
Löslichkeit | H2O: 25 mg/mL |
pka | 1.92(at 25℃) |
Aggregatzustand | Solid |
Farbe | White |
PH | 4.5-5.5 (100g/l, H2O, 20℃) |
Geruch (Odor) | sulfury |
Geruchsart | sulfurous |
Optische Aktivität | Optical rotation: +8° to +9° (c = 5, 1 N HCl, 20°C). |
Wasserlöslichkeit | 280 g/L (25 ºC) |
Sensitive | Air Sensitive |
maximale Wellenlänge (λmax) | λ: 260 nm Amax: 1.5 λ: 280 nm Amax: 0.2 |
Kennzeichnung gefährlicher | Xn,Xi |
R-Sätze: | 22-36/37/38-20/21/22 |
S-Sätze: | 36-37/39-26-24/25 |
WGK Germany | 3 |
RTECS-Nr. | HA1600000 |
F | 10-23 |
Selbstentzündungstemperatur | 420 °C |
TSCA | Yes |
HS Code | 29309012 |
Giftige Stoffe Daten | 52-90-4(Hazardous Substances Data) |
Toxizität | LD50 orally in Rabbit: 1890 mg/kg |
L-Cystein Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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