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Product name: L-Proline

    Yuebao Brand L-Proline is the reputable product of China. The transfusion of L-Proline has won the Quality Approval and recommended by Chinese Chemical pharmaceutical Industry Association. It is sold to Occident and Southeast Asia, etc. as well as home market.L-Proline is one of the important amino acids for synthesizing human protein. It is widely used in the food and medical industry, and is an important intermediate for synthesizing ACE inhibitors such as Captopril and Enalapril. It is also one of the important raw materials of amino acid transfusion. L-Proline has been used universally as food additive, catalyst and raw materials of fine chemical industry.
L-Proline:(S)-2-Pyrrolidinecarboxylic acid
CAS No.: 147-85-3
SPEC:AJI2002 /USP26/ EP5

SpecificationAJI2002/ USP26/ EP5



AJI2002 USP26 EP5

White crystals or crystalline powder; slightly sweet taste, very soluble in water, freely soluble in glacial acetic acid, sparingly soluble in ethanol, practically insoluble in diethyl ether.


White or almost white,
crystalline powder or colorless crystals
,very soluble in water,freely soluble in

Specific rotation -84.5 to -86.0

Specific rotation

-84.3 to -86.3

-84.0 to -86.0
Identification Must comply Must comply Must comply
State of solution%
clear and colourless
  Appearance of Solution,clear and colourless 
Chloride(Cl), % ≤0.020 ≤0.05 ≤0.02
Ammonium(NH4), % ≤0.02   ≤0.02
Sulfate(SO4), % ≤0.020 ≤0.03 ≤0.03
Iron(Fe), % ≤0.001 ≤0.003 ≤0.001
Heavy metals(Pb), % ≤0.001 ≤0.0015 ≤0.001
Arsenic(As2O3), % ≤0.0001    
Other amino acids Conforms Chromatographic purity,Conforms    Ninhydrin-positive substances,Comply with the provision
Loss on drying% ≤0.30 ≤0.4 ≤0.5
Residue on Ignition(sulfate)% ≤0.10 ≤0.4  
Sulfated ash, %     ≤0.1
Assay, % 98.5 to 101.0 98.5 to 101.5 98.5 to 101.0
pH 5.9 to 6.9    
Endotoxin <6.0EU/g    

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Post Code: 526040
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