L-cysteine Free Base

Chemical Name: (+)-2-Amino-3-mercaptopropionic acid
Structure Formula:
Molecular Formula: C3H7NO2S
Molecular Weight: 121.15
CAS No: [52-90-4]
Characteristics: White crystalline powder; Tasteless, easily soluble in water but insoluble in alcohol and ether
Quality Standards: AJI92

Item Specifications (AJI92)
Description: White crystals or crystalline powder
Identification: Meets the requirements
Specific rotation [a]D20°
+8.3 ° - +9.5°
State of solution: ≥ 95.0%
Chloride (Cl): ≤ 0.04%
Ammonium (NH4): ≤ 0.02%
Sulfate (SO4): ≤ 0.030%
Iron (Fe): ≤ 10PPm
Heavy metals (Pb): ≤ 10PPm
Arsenic (As2O3): ≤ 1PPm
Other amino acids
Conforms
Loss on drying: ≤ 0.5%
Residue on ignition (sulfated): ≤ 0.1%
Assay: 98.0-101.0%
pH: 4.5-5.5

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