L-Cysteine HCL Mono
 
 

Chemical Name: L-Cysteine hydrochloride monoh ydrate
Molecular Formula: C3H7NO2S.HCl.H2O
Molecular Weight: 175.64
Cas No: [7048-04-6]
Characteristics: White crystals or crystalline powder; strongly acid taste.
Quality Standards: USP28, AJI92.

  
 
Item Specifications
USP28 AJI92
Appearance White crystals or crystalline powder; strongly acid taste.
Identification Infrared Absorption ---
Specific optical rotation +5.6 °- +8.9 ° +5.5 °- +7.0 °
State of solution (Transmittance) --- ≥ 98.0% clear and colorless
Chloride (Cl) --- 19.89-20.29%
Ammonium(NH4) --- ≤ 0. 002%
Sulfate ≤ 0. 03 % ≤ 0. 020%
Iron ≤ 0. 003 % 10ppm
Heavy Metals (as Pb), ≤ 0.00 15% ≤ 10ppm
Arsenic (as As), --- ≤ 1ppm
Other amino acids --- Not detected
Organic volatile impurities Meets the requirement ---
Loss on drying, 8-12 % 8.5-12 %
Residue on ignition, c ≤ 0.1 0 %
Assay 98.5-101.5 % 9 9.0-10 0.5 %
pH value --- 1.5-2.0
Organic volatile impurities Meets the requirement ---
Chromatographic purity 0.5% max Individual impurity, 2% max total ---

Packaging and Storage: In 25kgs fiber drum double polyethylene bags inside; Preserve in well-closed containers, at controlled room temperature.
Recommended limit:1 year.