L-Tryptophan
L-Tryptophan (CAS: 73-22-3, C11H12N2O2) is an essential alpha-amino acid supplied by Tech Serve Solutions. With a molecular weight of 204.23 g/mol, it is a white crystalline powder. Sourced from non-animal origins, it meets EP, JP, and USP testing specifications and is suitable for cell culture applications. This compound is crucial in various biochemical pathways and research areas.
- IUPAC
- (S)-2-Amino-3-(3-indolyl)propionic acid,L-α-Amino-3-indolepropionic acid
- Synonyms
- (S)-2-Amino-3-(3-indolyl)propionic acidL-α-Amino-3-indolepropionic acid

Biochemical Research
L-Tryptophan serves as a fundamental building block for proteins and is a precursor to vital biomolecules, making it indispensable for cellular metabolism and biochemical studies.
Cell Culture Media
Its suitability for cell culture applications means L-Tryptophan is a valuable supplement in media formulations, supporting the growth and maintenance of various cell lines in research and biopharmaceutical development.
Analytical Standards
With a high assay of 99.0-101.0%, L-Tryptophan can be employed as an analytical standard in chromatography and other analytical techniques for accurate quantification and identification.
| Molecular weight | 204.23 |
|---|---|
| Empirical formula | C11H12N2O2 |
| Assay | 99.0-101.0% |
| Form | powder |
| Solubility | 1 M HCl: soluble10 mg/mL |
| Optical activity | [α]20/D −31.5±1°, c = 1% in H2O |
| Loss on drying | ≤0.1% loss on drying, 20 °C (HV) |
| Melting point | 280-285 °C (dec.)(lit.) |
| Impurities tested | endotoxin, tested |
| Suitability | meets EP, JP, USP testing specificationssuitable for cell culture |
| Biological source | from non-animal source |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Anion traces | chloride (Cl-): ≤50 mg/kgsulfate (SO42-): ≤50 mg/kg |
| Ignition residue | ≤0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | absorption0.5M/326 nm, 0.5 M HCl cut-off |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is L-Tryptophan used for?
+
L-Tryptophan is used in biochemical research as an essential amino acid, as a precursor for biomolecules, and as a supplement in cell culture media. It also meets EP, JP, and USP testing specifications.
What is the CAS number and formula for L-Tryptophan?
+
The CAS number for L-Tryptophan is 73-22-3, and its molecular formula is C11H12N2O2.
What grade and purity does Tech Serve Solutions supply for L-Tryptophan?
+
Tech Serve Solutions supplies L-Tryptophan with an assay of 99.0-101.0%. It meets EP, JP, and USP testing specifications and is suitable for cell culture. TSS does not represent it as USP/BP/EP grade without explicit verification.
How should L-Tryptophan be handled safely?
+
Handle L-Tryptophan with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. Ensure good ventilation.
How is L-Tryptophan packed and shipped?
+
L-Tryptophan is supplied as a powder and can be packed and exported globally by Tech Serve Solutions to meet customer requirements.
How can I request a sample or quote for L-Tryptophan?
+
To request a sample or quote for L-Tryptophan, please contact our sales team through the website or by phone, providing your specific requirements.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis