Short Description:

As a professional L-Tryptophan food additives and  food ingredients supplier and manufacturer, JUSTCHEM has been supplying and exporting from food additives and  food ingredients China for almost 10 years, please be assured to buy food additives and  food ingredients  at Justchem. Any inquiries and problems please feel free to send emails to us via sales@justchem.com we will reply you within 1 working day.


  • Min.Order Quantity: 500kg
  • QC: Haccp,Kosher,Halal,Iso
  • Payment Terms: L/C,D/A,D/P,T/T
  • HS Code: 2933990090
  • CAS No.: 73-22-3
  • MF: C11H12N2O2
  • Shelf life: 2 Years
  • Packing: Qty in 20' FCL:10MT
  • Appearance : white powder
  • EINECS No.: 200-795-6
  • Product Detail


    Our Factory

    Product Tags

    Product Name: Raw Material L-Tryptophan Feed Grade


    L-Tryptophan (feed grade) is considered as the third largest amino acid added into feed following L-Methionine and L-Lysine.Moreover,it would cause diabetes and neurological disorders if the metabolism of L-Tryptophan were disturbed.Therefore,L-Tryptophan is also used into amino acid injection and compound amino acid injection and compound amino acid injection in medicine.


    1.Large Stock Low Price Feed Grade L-Tryptophan 98%

    2.Synonyms:L Tryptophan, Tryptophan, L-Tryptophan feed grade

    3.CAS  No.: 73-22-3.

    4.Chemical Name: 2-Amino-3-indolepropionic acid

    5.Chemical Formula: C11H12N2O2
    6.Shelf life:2 years


    Product Specification Of L-Tryptophan 98% Feed Grade

    Items Standards
    Appearance White crystals or crystalline powder
    Assay 98% Min
    Specific Rotation -29.0°~-32.3°
    Loss on Drying 0.5% Max
    Heavy Metals 20mg/kg Max
    Arsenic(As2O3) 2mg/kg Max
    Residue on ignition 0.5% Max


    Product Specification Of L-Tryptophan 98.5%

    Items Standards
    Appearance White crystals or crystalline powder
    Assay(%) 98.5-100.5
    Specific Rotation(°) -30.5 ~ -32.5
    Loss on drying(%) 0.3 Max
    pH 5.4 – 7.0
    Chloride(%) 0.05 Max
    Iron(%) 0.003 Max
    Sulfate(%) 0.03 Max
    Residue on ignition(%) 0.1 Max
    Heavy Metals(ppm) 15.0 Max



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  • 1.What kinds of certificates can you offer?

    We can offer HAPPC, KOSHER, HALAL Certificates, ect.


    2. Are you a manufacturer or  a trading company?

    We are manufacturer for agar agar and carrageenan , Our factory established in 1992, we do more than 10years food additives in domestic market .
    In 2016, We set up a branch company in Shanghai and create our new brand JUSTCHEM, dedicating to offer better sales service for food additives as well as to expand overseas markets.


    3. How long shall we wait for your reply?

    We can guarantee to reply your inquiries  in less than 24 hours in working days.


    4. What kinds of transportation types can you provide?

    Our main transportation methods include air transportation, railway transportation and sea transportation.


    5. How long will I receive my good?

    Usually we will arrange the shipment in 7 -15 days.


    6. What documents you provide?  
    Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificat and Origin certificate. If your markets have any special requirements, let us know.


    7. What is loading port?
    Usually is Shanghai , Qingdao , Tianjin,Dalian and ect.


    FACTORY (1)Justchem have departments including international sales, purchasing, technical, after-sales service, network engineering, general affairs, etc. We are able to offer service and support in English, Portuguese, Russian, Japanese, Korean and other languages. Within the efforts of all staff of us, our market has covered more than 40 countries and areas, which prompting us to be the most reliable partner of food producer and merchant all over the world. We have more than 20 professional sales offer you 7*24 online sales service.

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