L-Tryptophan, USP28

Weight: 200g
Sale price$47.00


L-Tryptophane, compliant with the USP28 standards, stands as a crucial amino acid essential for protein synthesis and neurotransmitter regulation. This meticulously crafted compound, also known as 2-Amino-3-(1H-indol-3-yl)propanoic acid, embodies pharmaceutical-grade quality, ensuring optimal efficacy and safety in diverse applications. Its significance as an essential amino acid pivotal for overall well-being makes it a fundamental component in numerous industries.

CAS No.: 73-22-3
EINECS No.: 200-795-6
Chemical Formula: C11H12N2O2
Molecular Weight: 204.228
Other names:
2-Amino-3-(1H-indol-3-yl)propanoic acid;
Tryptophan or (2S)-2-amino-3-(1H-indol-3-yl)propanoic acid
Melting Point: 283ºC



White crystalline powder



98.5% to 101.5%


Specific rotation [α]D20:

- 29.40 to - 32.80


Loss on drying

0.30% max



5.5 to 7.0


Residue on ignition [sulfated]:

0.10% max


Chloride [Cl-]:          

0.05% max


Sulfate [SO4]:

0.03% max


Iron [Fe]:

30ppm max


Heavy metals [Pb]:

15ppm max


Arsenic [As2O3]:

1ppm max


Chromatographic purity:

Individual impurity not more than 0.5%

Total impurities not more than 2.0%


Key Features:

  • Essential Amino Acid: Crucial for protein synthesis and neurotransmitter regulation.
  • Pharmaceutical Grade: Complies with stringent USP28 standards for exceptional quality.
  • Versatile Utility: Integral in pharmaceuticals, dietary supplements, and biochemical research.

L-Tryptophane holds a pivotal role across multiple sectors. In pharmaceuticals, it contributes to formulations aimed at supporting mental health and sleep patterns due to its role in neurotransmitter regulation. Its use in dietary supplements underscores its significance in promoting overall well-being, including mood regulation and cognitive function. Additionally, its value in biochemical research serves in elucidating various cellular processes, further highlighting its versatile utility.

Adhering to USP28 standards, L-Tryptophane ensures reliability and quality in pharmaceuticals, dietary supplements, and biochemical research, substantiating its crucial role in enhancing products reliant on its exceptional biochemical properties.

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