L-CYSTINE For Biochemistry

Description

Physical state at 20 °C	Solid	Colour	Colorless crystalline
Melting point/ Freezing point [°C]	> 240 °C	Solubility in water [% weight]	Soluble in water

Appearance	White to off white powder
Assay	98.5 – 101%
Specific optical rotation ([α]20/D; 20 g/L in 1 mol/L HCl; on dried substance)	-218 to -224°
Chloride (Cl)	Max 0.05%
Sulphate (SO4)	Max 0.03%
Ammonium (NH4)	Max 0.02%
Ninhydrin positive substance	Max 0.2%
Loss on drying (at 110°C)	Max 0.5%
Sulphated ash	Max 0.1%
Iron (Fe)	Max 0.002%
Lead (Pb)	Max 0.001%

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