98%d-Tryptophan

Updated: 2026-09-14

Overview

98%d-Tryptophan is a deuterium-labeled variant of the essential amino acid L-tryptophan, with 98% of its hydrogen atoms replaced by deuterium. This isotopically enriched compound is primarily used in research applications, particularly in pharmaceutical development and metabolic studies. Its high isotopic purity makes it valuable for tracking biochemical pathways. The deuterium labeling provides a stable isotopic marker that can be detected using mass spectrometry or NMR techniques. This allows researchers to study drug metabolism, protein interactions, and other biological processes with high precision. The compound is synthesized under controlled conditions to ensure consistent isotopic enrichment.

Physical and Chemical Properties

98%d-Tryptophan exhibits similar chemical behavior to its non-deuterated counterpart but with subtle differences in bond strengths and vibrational frequencies due to the deuterium substitution. The compound appears as a white to off-white crystalline powder with a typical amino acid structure. Its melting point is approximately 280°C, though it may decompose at this temperature. Solubility in water is limited, and it is generally insoluble in common organic solvents like ethanol or acetone. The deuterium atoms increase the molecular weight slightly compared to standard tryptophan, which can be significant in analytical applications. The isotopic purity of 98% ensures minimal interference from non-deuterated species in sensitive experiments.

Main Applications

The primary use of 98%d-Tryptophan is in pharmaceutical and biochemical research. It serves as a tracer in metabolic studies, allowing scientists to track the incorporation of tryptophan into proteins or its conversion into other metabolites like serotonin or niacin. This is particularly useful in drug development and neuroscience research. Another key application is in the production of isotopically labeled peptides and proteins for NMR studies. The deuterium atoms provide distinct signals that help in determining molecular structures and dynamics. Additionally, this compound is used in the development of diagnostic agents and in studies of enzyme mechanisms where hydrogen/deuterium exchange is relevant.

Safety and Storage

98%d-Tryptophan is generally considered safe to handle under standard laboratory conditions. It is not classified as hazardous, but standard precautions for handling fine powders should be observed to avoid inhalation or contact with eyes and skin. Proper personal protective equipment, including gloves and safety glasses, is recommended. For long-term stability, the compound should be stored in a tightly sealed container in a cool, dry place, protected from light and moisture. Exposure to humid conditions can lead to clumping or degradation. The shelf life is typically several years when stored correctly, though users should verify the material's integrity before use in critical applications.

B2B Procurement Guide

When sourcing 98%d-Tryptophan, buyers should prioritize suppliers with proven expertise in isotopic labeling and a track record of supplying high-purity materials. Key procurement considerations include verifying the certificate of analysis, which should detail isotopic purity, chemical purity, and any detectable impurities. Given the specialized nature of this product, lead times may be longer than for standard chemicals, and prices can vary significantly based on quantity and supplier. Bulk purchases may offer cost advantages, but storage conditions must be carefully managed. Buyers should also consider the supplier's ability to provide technical support and documentation for regulatory compliance, especially for pharmaceutical applications.