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L-CYSTEINE For Biochemistry

(R)-2-Amino-3-mercaptopropionic acid

COAs

Packings

5 g (00005)

25 g (00025)

500 g (00500)

1GBA000015 1PW1200060 1PW1200500
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Article No. 03140 Grade For Biochemistry
Purity 99% CAS No. 52-90-4
Molecular Formula C3H7NO2S Molecular Weight 121.16
H.S. Code 2930.9040 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Colorless crystalline
Melting point/ Freezing point [°C] 220 °C Solubility in water [% weight] Appreciable (> 10%)

Specifications

Appearance Colorless crystalline powder Assay Min. 99%
Specific optical rotation ([α]20/D) +8.0° to +9.0° UV absorbance Max. 0.5
Loss on drying (at 105°C; 4 hrs) Max. 0.3% Chloride (Cl) Max. 0.002%
Sulphate (SO4) Max. 0.01% Heavy metal (as Pb) Max. 0.001%
Ammonium (NH4) Max. 0.01% Foreign amino acids Max. 0.5%
Other ninhydrin positive substances (as glycine) Max. 0.1%

Safety Information and Hazard Symbols

Exclamation Mark
Symbol: GHS07
 Signal Word: Warning
 Hazardous Statement: H302
Revision Date: 15-Jan-2015

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