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Product Name

 L-CYSTINE (FOR BIOCHEMISTRY)

Article No

 C0081300100

CAS No

 56-89-3

Molecular Formula

 C6H12N2O4S2

Molecular Weight

 240.30

Specifications

Appearance:

 White to off white powder

Sulphated ash:

 Max 0.1%

Chloride (Cl):

 Max 0.05%

Sulphate (SO4):

 Max 0.03%

Lead (Pb):

 Max 0.001%

Iron (Fe):

 Max 0.002%

Assay:

 98.5 - 101%

Ammonium (NH4):

 Max 0.02%

Loss on dryig (at 110°C):

 Max 0.5%

Specific optical rotation ([?]20/D; 20 g/L in 1 mol/L HCl; on dried substance):

 -218 to -224°

Ninhydrin positive substance:

 Max 0.2%