L-Tryptophan
CAS 73-22-3
EC 200-795-6
Formula C11H12N2O2
MW 204.23 g/mol
Amino Acids & Peptides Personal Care & CosmeticsPharmaceuticals & HealthcareFood & Nutrition Humectant & MoisturizingAntioxidant & StabilizerpH Regulation & Buffering
Description
L-Tryptophan (CAS 73-22-3, abbreviated Trp) is an essential amino acid supplied as a white crystalline powder under trade names including L-Tryptophane and Tryptophan, L-. It carries no E-code designation and is classified under HS code 29339990 within the amino acids and peptides category.
In personal care formulations, Trp functions as a humectant by binding water molecules within the skin matrix and as a hair and skin conditioner that supports structural protein integrity. Its indole side chain also provides antioxidant activity, scavenging free radicals to stabilise sensitive cosmetic and pharmaceutical preparations. In food and nutraceutical applications, it serves as a pH buffer, maintaining formulation stability across processing conditions.
L-Tryptophan is available in pharmaceutical grade (Ph.Eur., USP) and food grade (FCC) specifications, supporting use across regulated industries. The substance is fully REACH-registered for supply within the European Economic Area. Standard packaging formats include fibre drums and multi-layer bags, with documentation available upon request.
In personal care formulations, Trp functions as a humectant by binding water molecules within the skin matrix and as a hair and skin conditioner that supports structural protein integrity. Its indole side chain also provides antioxidant activity, scavenging free radicals to stabilise sensitive cosmetic and pharmaceutical preparations. In food and nutraceutical applications, it serves as a pH buffer, maintaining formulation stability across processing conditions.
L-Tryptophan is available in pharmaceutical grade (Ph.Eur., USP) and food grade (FCC) specifications, supporting use across regulated industries. The substance is fully REACH-registered for supply within the European Economic Area. Standard packaging formats include fibre drums and multi-layer bags, with documentation available upon request.
Physical Properties
| Melting Point | 282 °C |
| Boiling Point | 342.72°C (rough estimate) |
| Density | 1.34 |
| Appearance | White to off-white crystalline powder |
| Color | White to yellow-white |
| Odor | wh. cryst. or cryst. odorless powd., sl. bitter taste |
| Form | powder |
| Water Solubility | 11.4 g/L (25 ºC) |
| Refractive Index | -32 ° (C=1, H2O) |
| pH | 5.5-7.0 (10g/l, H2O, 20℃) |
| Log P | 0.704 (est) |
Trade & Regulatory
| HS Code | 29339990 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
(2S)-2-amino-3-(1H-indol-3-yl)propanoic acidTrpL-TrpTryptophanTryptophaneL-TryptophaneTryptophan, L-L-(-)-Tryptophanl-β-3-Indolylalanine
Related Products
Raw Materials
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