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  • CAS NO: 73-22-3 (80206-30-0)
  • Grade: Food Grade
  • Purity: 99.5% min
  • Packaging: 25kg/drum
  • Certifications : ISO, KOSHER, HALAL, HACCP
  • Min Order: 500kg
  • Price: Inquiry

Tryptophan, β-mercaptoalanine, is a white or slightly yellow crystalline or crystalline powder; odorless and slightly bitter. Slightly soluble in water, very slightly soluble in ethanol, insoluble in chloroform, easily soluble in formic acid, dissolved in sodium hydroxide solution or dilute hydrochloric acid. Tryptophan is an important precursor of auxin biosynthesis in plants. Its structure is similar to that of IAA and it is common in higher plants.


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)
Salmonella( 25g in sample)


1. L Tryptophan is an important nutrient.

2. L Tryptophan takes part in the renewal of animal blood plasma protein in the body

3. L Tryptophan helps nicotinic acid and the synthesis of hemoglobin. It can significantly increase antibody in pregnant animals baby.

4. L Tryptophan can promote lactation of cows and sows.

5. When animals are lack of Tryptophan,they stop growing,lose weight and reduce fat accumulation. The male breeding stock will testicular atrophy.

6. L Tryptophan is used as control agent of pellagra


This product is an important nutrient. It can participate in the renewal of plasma proteins in animals and can promote the action of riboflavin. It also contributes to the synthesis of niacin and heme. It can significantly increase antibodies in pregnant fetuses and promote lactation in lactating dairy cows and sows. effect. When livestock and poultry lack tryptophan, growth stagnates, body weight decreases, and fat accumulation decreases, and the genital testes shrink.

It is used as a control agent for ecdysis in medicine.

73-22-3 (80206-30-0)
L(-)-Tryptophan; (S)-2-Amino-3-(1H-indol-3-yl)propanoic acid; L-alphs-Amino-3-indolepropionic acid; Indole-3-alanine; Trp
Formula weight
Structural formula
Water solubility
  • Payment term: T/T 30% in advance and T/T 70% against copy of B/L. or 100% L/C at sight.
  • Shipment time: Within 3 weeks after confirming order.
  • We take photos of every stage of the process and can send them to you. Before we ship the container, you will have photos and lab test results.

Provide quality after-sale service once the container is received.

   In case the product is damaged, we will refund you or resend a new packaging.
   Also, if the goods are not as per your specification, we will callback the container at our cost, or compensate you as per our agreement.

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