L-Tryptophan

L-Tryptophan
Model:73-22-3
Brand:HUAMAO
Origin:Made In China
Category:Chemicals / Pharmaceutical Chemicals
Label: -
Price: US $15 / KG
Min. Order:25 KG
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Product Description

【Package】Fiber Drum outside,double PE bags inside .(25kgs)

【Storage】Cool, dry, dark in closed containers; recommended limit 1 years.

【Quality Standard】

Item

CP2010

EP5

AJI92

USP24

Assay

≥99.0%

98.5～101.5%

99.0%～101.0%

98.5～101.5%

pH

5.4～6.4

 

5.5～6.4

5.5~7.0
Specific rotation[a]D020

-30.0°～-32.5°

-30.0°～-33.0°

-30.5～-32.5°

  

　　　　　　[a]D025

    

 

-29.4～-32.8°

Transmittance(T430)

clear & colorless
≥95.0%

 

≥95.0%

 

Chloride(Cl)

≤0.02%

≤0.02%

≤0.02%

≤0.05%

Ammonium(NH4)

≤0.02%

≤0.02%

≤0.02%

 

Sulfate(SO4)

≤0.02%

≤0.03%

≤0.02%

≤0.03%

Iron(Fe)

≤20ppm

≤20ppm

≤20ppm

≤30ppm

Heavy metals(Pb)

≤10ppm

≤10ppm

≤10ppm

≤15ppm

Arsenic

≤1ppm

 

≤1ppm(As2O3)

 

Lead(Pb)

 

 

 

 

Other amino acids

≤0.5%

 

Conforms

 

Ninhydrin-positive

 

conform

 

 

Loss on drying

≤0.20%

≤0.50%

≤0.20%

≤0.3%

Residue on ignition

≤0.10%

≤0.10%

≤0.10%

≤0.1%

Organic volatile impurities

 

 

 

Conforms

Endotoxin

≤50EU/g

 

 

  

L-Tryptophan 1

Member Information

NINGBO HUAMAO IMP.&EXP. CO.,LTD
Country/Region:Zhe Jiang - China
Business Nature:Manufacturer
Phone:27729110
Contact:Mavis (sales Manager)
Last Online:01 Aug, 2014
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