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L-CYSTINE For Biochemistry

(R,R)-3,3'-Dithiobis(2-aminopropionicacid)

COAs

Packings

25 g (00025)

100 g (00100)

500 g (00500)

1PW1200060 1PW1200200 1PW1200750
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Article No. 03145 Grade For Biochemistry
Purity 98.5% CAS No. 56-89-3
Molecular Formula C6H12N2O4S2 Molecular Weight 240.30
H.S. Code 2930.9040 Shelf Life 60 Months

Physical Properties

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

Specifications

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%
Revision Date: 07-Mar-2018

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