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Product Name

 L-CYSTEINE (FOR BIOCHEMISTRY)

Article No

 C0081000025

CAS No

 52-90-4

Molecular Formula

 C3H7NO2S

Molecular Weight

 121.16

Specifications

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 ([?]20/D):

 +8.0° to +9.0°