Molekula
L-Tryptophan (TF)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Certificate of Analysis with every batch
L-Tryptophan (TF) is an essential amino acid and precursor to serotonin and melatonin, widely used in dietary supplements, pharmaceuticals, and nutritional products for mood regulation, sleep support, and protein synthesis. This high-purity crystalline powder has a CAS number of 73-22-3, a molecular formula of C11H12N2O2, and a molecular weight of 204.23. It is stable at ambient storage conditions with no signal word classification. Molekula supplies L-Tryptophan (TF) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
This substance is available from Molekula on enquiry. Full specification, Safety Data Sheet and Certificate of Analysis documentation are provided with your quotation once our team confirms the grade and pack size you need.
Overview
- SKU
- 90030873
- CAS Number
- 73-22-3
- IUPAC Name
- (2S)-2-amino-3-(1H-indol-3-yl)propanoic acid
- EC Number
- 200-795-6
- Molecular Formula
- C11H12N2O2
- Molecular Weight
- 204.23
- Exact Mass
- 204.0899
- SMILES
- C1=CC=C2C(=C1)C(=CN2)C[C@@H](C(=O)O)N
- InChIKey
- QIVBCDIJIAJPQS-VIFPVBQESA-N
- InChI
- InChI=1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)/t9-/m0/s1
- PubChem CID
- 6305
Synonyms
- (2S)-2-amino-3-(1H-indol-3-yl)propanoic acid
- (S)-Tryptophan
- Ardeytropin
- L-tryptophan
- L-Tryptophane
- Pacitron
- trofan
- tryptacin
- tryptophan
- Tryptophane
Literature values
Published physical properties of the substance, not batch specifications.
- Odour
- Odorless
- Melting Point
- 282 °C (decomposes)
- Solubility (other solvents)
- Slightly soluble in acetic acid, ethanol; insoluble in ethyl ether
- pKa
- pKa = 7.38 (at 25 °C)
- log P (octanol/water)
- -1.06
Source: PubChem CID 6305 (HSDB, DrugBank)
See all 3 other grades of CAS 73-22-3 →
Frequently asked questions
What is L-Tryptophan primarily used for?
L-Tryptophan is commonly used as a dietary supplement for sleep regulation, mood enhancement, and as a precursor for serotonin and melatonin production.
What is the chemical formula and molecular weight of L-Tryptophan?
The chemical formula is **C₁₁H₁₂N₂O₂**, and the molecular weight is **204.23 g/mol**.
How should L-Tryptophan be stored?
Store L-Tryptophan at **ambient temperature** in a dry, well-ventilated area, away from direct sunlight and moisture.
What grades of L-Tryptophan does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/JP)** and **food-grade** L-Tryptophan, depending on application requirements.
Can Molekula supply L-Tryptophan in bulk quantities?
Yes, Molekula can supply L-Tryptophan in **bulk quantities**, with flexible packaging options (e.g., drums, bags, or custom solutions).
What documentation comes with an order of L-Tryptophan?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Related products
Molekula has supplied fine chemicals and biochemicals since 2000 from ISO 9001:2015 and ISO 14001:2015 certified facilities. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.