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L-Cystine

L-Cystine
L-Cystine
Product Code : LC1781
Product Description
LC1781 L-Cystine
suitable for use as excipient exp Ph Eur

 

Order number Packaging Quantity Price €
AC28781 Plastic bottle 1 kg Inquire
AC28781 Plastic drum 10 kg Inquire

 

Product information
Grade Ph Eur
Hill Formula C6H12N2O4S2
HS Code 2930 90 13
EC number 200-296-3
Molar mass 240.29 g/mol
CAS number 56-89-3

 

Chemical and physical data
Ignition temperature 400 °C
Solubility (20 °C) insoluble
Melting point 261 - 262 °C (decomposition)
Molar mass 240.29 g/mol
Density 1.677 g/cm3 (20 °C)
Bulk density 300 kg/m3
pH value >1 (H2O, 20 °C)

 

Safety information
RTECS HA2690000
Storage class 10 - 13 Other liquids and solids
WGK NWG not water endangering

 

Specifications
Assay (bromatometric, calculated on dried substance) 98.5 - 101.0 %
Identity (IR-spectrum) passes test
Appearance white to almost white, fine powder
Appearance of solution (100 g/l, hydrochloric acid  2 mol/l) clear and not more intense in color than reference solution Y7
Spec. rotation (α 20/D, 20 g/l, hydrochloric acid 1 mol/l, calc. on dried substance) -218° to -224°
Chloride (Cl) ≤ 0.02 %
Sulfate (SO4) ≤ 0.03 %
Heavy metals (as Pb) ≤ 0.001 %
Fe (Iron) ≤ 0.001 %
NH4 (Ammonium) ≤ 0.02 %
Ninhydrin - positive substances (TLC) ≤ 0.2 %
Ninhydrin - positive substances (LC) (largest single impurity) ≤ 0.2 %
Residual solvents (Ph. Eur./ICH) excluded by manufacturing process
Sulfated ash (600 °C) ≤ 0.1 %
Loss on drying (105 °C) ≤ 0.5 %

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