D-Tryptophan CAS 153-94-6

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Basic Info

Product Name:D-Tryptophan
Place of Origin:Shandong, China
Brand Name:Zhishang Chemical
Type:Amino Acid Derivatives
Appearance:White powder
EINECS No.:205-819-9
Storage:Cool Dry Place
Provide:D-Tryptophan msds;D-Tryptophan COA

Chemical Properties:

White flaky crystal, sweet taste; soluble in hot ethanol, alkali solution and water, insoluble in chloroform, the aqueous solution is weakly acidic; mp is 281-282℃, decomposition point is 289℃; specific rotation [α]23D+33.7° (Chemicalbook 0.5-2.0mg/ml, H2O), [α]20D-2.8°(0.5-2.0gm/ml, 1mol/LHCl), LD50 (rat, abdominal cavity) 4289mg/kg.


  1. As a non-protein active amino acid, it has special physiological properties. It can be used as a non-nutritive sweetener, feed additive, and plant growth agent in the food and feed industry and agriculture. In the pharmaceutical industry, it is mainly used to synthesize various
  2. polypeptides instead of L-tryptophan prolongs the half-life of peptide drugs and reduces side effects, does not causeD-Tryptophan Chemicalbook resistance and becomes an important syntheticD-Tryptophan precursor for enzyme inhibitors. It can improve the body’sD-Tryptophan immunity and delay the occurrence of allergic reactions. Most peptide antibiotics can resist gram-positive bacteria, and some have good inhibitory or killing effects on gram-negative bacteria such as Pseudomonas aeruginosa,D-Tryptophan mycobacterium, fungi, germs, germs and tumor cells.

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.