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Location：Home > Products > Leading Product
Products
L-Cysteine
  Quality standard:USP, AJI
CAS No.: 52-90-4
Kosher:?ì
Halal:?ì
Class:

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: AJI

 

Item

Specifications (AJI)

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.