L-CYSTEINE (FOR BIOCHEMISTRY)

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
C0081000100	For Biochemistry	99%	52-90-4	C₃H₇NO₂S	121.16	2930.9040	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%)

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

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H302