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Quick Details

  • CAS No.: 73-22-3
  • Other Names: L-Trytophan
  • MF: C11H12N2O2
  • EINECS No.: 200-795-6
  • Place of Origin: Shanghai, China (Mainland)
  • Type: Vitamins, Amino Acids and Coenzymes
  • Grade Standard: Food Grade, Medicine Grade
  • Brand Name: Brightol
  • Model Number: AAA
  • Purity: >99%, > 99%
  • Grade: Food grade
  • Function: bodybuilding
  • Quality: 100% nature
  • Shelf life: 2 Years
  • Brand: Brightol
  • Packing: 25kg/drum
  • quality: High quality
  • serve: 7*24
  • contact person: Alan

Packaging & Delivery

Packaging Details 25kg/drum
Delivery Time within a week after the order

USP L-Tryptophan 73-22-3



Basic information

Name: L-Tryptophan

Appearance: White powder 

Molecular Formula: C11H12N2O2
Molecular Weight: 204.23
CAS Registry Number: 73-22-3 (80206-30-0)

Density: 1.34
Melting point: 280-285 ºC
alpha: -31.1 º (c=1, H20)
Water solubility: 11.4 g/L (25 ºC)





What is L-tryptophan?


L-tryptophan is an amino acid, a protein building block that can be found in many plant and animal proteins. L-tryptophan is called an “essential” amino acid because the body can’t make it. It must be acquired from food.






L-tryptophan is used for insomnia, sleep apneadepressionanxiety, facial pain, a severe form of premenstrual syndrome called premenstrual dysphoric disorder (PMDD), smoking cessation, grinding teeth during sleep (bruxism), attention deficit-hyperactivity disorder (ADHD), Tourette's syndrome, and to improve athletic performance.

How does it work?

L-tryptophan is naturally found in animal and plant proteins. L-tryptophan is considered an essential amino acid because our bodies can't make it. It is important for the development and functioning of many organs in the body. After absorbing L-tryptophan from food, our bodies convert it to 5-HTP (5-hyrdoxytryptophan), and then to serotonin. Serotonin is a hormone that transmits signals between nerve cells. It also causes blood vessels to narrow. Changes in the level of serotonin in the braincan alter mood.






White to yellowish White crystals or crystalline Powder


Infrared absorption

Specific Rotation[a]D25°

-29.4°to -32.8°

Loss on drying


Residue on ignition:








Heavy Metals:


Organic volatile impurities:

Meets the requirements


98.5% to 101.5%




More information about our products,


Cantact us,

If you have any further questions or need a sample,Please do not hesitate to contact  with me.

Wish you all of the best and regards!

sincerely yours,Alan.Lee


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