Overview
5-Hydroxyindoleacetic Acid (5-HIAA) is the primary metabolite of serotonin, formed through oxidative deamination. It plays a crucial role in neurotransmitter metabolism and is widely used as a biomarker in clinical and research settings. First identified in the 1950s, 5-HIAA has become essential for diagnosing carcinoid tumors and studying serotonin-related disorders. Its stability in urine makes it particularly valuable for diagnostic testing.
Physical and Chemical Properties
5-HIAA appears as a white crystalline powder with good solubility in polar solvents. The compound demonstrates stability under proper storage conditions but may degrade when exposed to light or elevated temperatures. Its molecular structure includes both carboxylic acid and hydroxyl functional groups, contributing to its polarity. The compound shows characteristic UV absorption at 280 nm, which is useful for analytical detection methods.
Main Applications
In clinical diagnostics, 5-HIAA urine tests are the gold standard for detecting carcinoid tumors that secrete serotonin. The test requires strict dietary controls to avoid false positives from serotonin-rich foods. Research applications include neurochemical studies, particularly investigations of serotonin metabolism and its relation to depression, anxiety, and other neurological conditions. Pharmaceutical companies use 5-HIAA as a reference standard in drug development.
Safety and Storage
While 5-HIAA is not classified as highly hazardous, standard laboratory precautions should be followed. Gloves and eye protection are recommended when handling the powder form to prevent irritation. Proper storage is critical for maintaining stability. The compound should be kept in amber glass containers at refrigerated temperatures, with desiccants to control moisture. Opened containers should be flushed with inert gas before resealing.
B2B Procurement Guide
When sourcing 5-HIAA, prioritize suppliers that provide certificates of analysis including HPLC purity data and residual solvent information. Research-grade material typically requires ≥98% purity, while clinical applications may demand higher specifications. Consider ordering in multiple smaller packages rather than bulk containers to preserve compound integrity. International shipments may require special documentation as some countries regulate serotonin-related compounds.
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