| ≥1 piece |
L-CYSTINE
Chemical Name: L(-)-3,3'-Dithiobis(2-aminopropanoic acid)
Structure Formula:
Molecular Formula: C6H12N2O4S2
Molecular Weight: 240.29
Cas No: [56-89-3]
Characteristics: White crystals or crystalline powder; tasteless. Practically insoluble in water, in ethanol and in ether. Dissolves in dilute HCl.
Quality Standards: AJI92, FCCIV, In-house (ref USP24)
Item Specifications (AJI92 ) USP 24 FCC IV
Appearance White crystal or crystalline powder; tasteless
Description White crystals or crystalline powder
Identification Infrared absorption spectrum
Specific rotation
[a]D20 -215 - -225 -215 - -225 -215 - -225
State of solution
(Transmittance) 98.0% --- ---
Chloride(CL) 0.020% 0.020% ---
Ammonium(NH4) 0.02% --- ---
Sulfate(SO4) 0.020% 0.020% ---
Iron(Fe) 20PPm 20PPm ---
Heavy metals(Pb) 10PPm 10PPm 20ppm
Arsenic(As2O3) 1PPm --- ---
Other amino acids Conforms --- ---
Loss on drying 0.20% 0.20% 0.20%
Residue on ignition (Sulfated) 0.10% 0.10% 0.10%
Assay 98.5-101.0% 98.5-101.0% 98.5-101.0%
PH 5.0-6.5 5.0-6.5 ---
Organic Volatile
impurities --- Meets the requirements ---
Packaging and Storage: In 25kgs f iber drum double polyethylene bags inside; Preserve in well-closed containers, at controlled room temperature.
R ecommended limit: 1 year.