L-Tryptophan Powder 98.5%

1.Product Name: L-Tryptophan
2. CAS No.: 73-22-3
3. Specification:L-Tryptophan ,Min 98.5%,HPLC
4. Test Method:HPLC
5. Latin Name:L-Tryptophan
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Product Details


L-Tryptophan is an important precusor substance of auxin biosynthesis in plant. L-Tryptophan powder 98.5% has the similar structure of IAA. It widely exists in higher plant. There are two ways to synthetic auxin. The first is tryptophan oxidizes and deaminize and form indole acetone,then decarboxylation and form IAAId; Under the corresponding enzymes IAAId oxsidizes indoleacetic acid. The second way is 

decarboxylation and form to tryptamine then tryptamine oxsidize deamination finally forms tryptophan. 

L-tryptophan is an amino acid, a protein building block that can be found in many plant and 

animal proteins. It is called an “essential” amino acid because the body can't make it. 

It must be acquired from food.





White to light yellow

Assay(dried basis),%


Specific rotation

-29°~ 32.8°


5.0 ~ 7.0

Loss on drying


Crude Ash




Pb (mg/kg)


Cd (mg/kg )


Hg (mg/kg)



( 25g in sample)




1.It is a very important nutrient substance,which widely used in renewal of animal blood plasma protein in the body,promoting lactation of cows and sows.

2.It helps nicotinic acid and the synthesis of hemoglobin,which can significantly increase antibody in pregnant animals baby.

3.It is used as control agent of pellagra.

4.L-Tryptophan powder 98.5% is used for insomnia, sleep apnea, depression, anxiety, facial pain.

5.It has been used to cure premenstrual syndrome called premenstrual dysphoric disorder (PMDD), smoking cessation, grinding teeth during sleep (bruxism), attention deficit-hyperactivity disorder (ADHD), Tourette's syndrome.

6.L-Tryptophan powder can improve athletic performance.


1.It is applied in the field of Pharmaceuticals.

2.It is applied in the field of Nutrition supplments Products.

3.It is applied in the field of Healthcare products,it’s an essential substance for the human body.



1--Standard Package: 25KG/drum,Double Aseptic food poly bags inside,Paper Drums outside.

1--Sample Package: Aluminum foil bag.

2--Quantity Less than 50kgs, Recommend to take by DHL,UPS,TNT,EMS,Fedex.

3--Quantity Less than 200kgs, Recommend to take Air Shipment.

4--Quantity More than 200kgs, Recommend to take Sea Shipment.

5--Lead Time: By Express Courier, around 4 to 7 days.

             By Air,  around 2 to 4 days

             By Sea, around 7 to 30days.

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