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Name: Serotonin
Chemical Formula: C10H12N2O
Molecular Weight: 176.22 g/mol
Appearance: Off-white crystalline powder
Synonyms: 5-hydroxytryptamine, 5-HT
Common Use: Biological neurotransmitter found naturally in animals and plants
Main Hazards: Irritant to eyes and skin on direct contact; potentially harmful if inhaled or ingested in large amounts
Classification: Irritant (based on available chemical data for analogs)
Primary Health Effects: Sensitization through prolonged or repeated contact; some animal studies show acute effects at high exposure levels
Warning Symbols: Not classed as highly hazardous for routine laboratory handling, but proper precautions needed to avoid accidental contact or exposure
Component: Serotonin base (purity varies depending on source, often >98%)
Impurities: Trace byproducts from synthesis (usually tryptophan derivatives)
Inhalation: Remove person to fresh air immediately; seek medical advice if symptoms develop such as coughing, dizziness, or shortness of breath
Skin Contact: Wash exposed area with plenty of water and mild soap; remove any contaminated clothing
Eye Contact: Rinse eyes under running water for fifteen minutes; do not rub eyes; seek medical evaluation if irritation persists
Ingestion: Rinse mouth with water; do not induce vomiting; monitor symptoms and get medical help if any adverse effects appear
Extinguishing Media: Water spray, dry chemical, foam, or carbon dioxide
Combustible Risks: As an organic compound, serotonin can burn and may emit toxic fumes like nitrogen oxides and carbon monoxide when heated to decomposition
Firefighting PPE: Firefighters should wear self-contained breathing apparatus and protective clothing to prevent exposure to smoke or decomposition byproducts
Hazards from Byproducts: Heating can release hazardous vapors; buildings should have proper ventilation
Personal Precautions: Use gloves, safety goggles, and dust mask to protect from accidental exposure
Cleanup Methods: Collect spilled material using damp cloth or HEPA-filter vacuum to prevent dust; avoid sweeping dry powder to reduce airborne particles
Environmental Precautions: Prevent release into watercourses or soil, as even small amounts can disrupt aquatic organisms and microbial communities
Handling Rules: Handle with care in well-ventilated areas; avoid inhalation of dust; do not eat, drink, or smoke around open compound
Safe Storage Conditions: Keep tightly closed in original container, protected from moisture and light at temperatures below room temperature
Storage Risks: Excessive heat or sunlight speeds degradation; containers should remain dry to stop clumping or breakdown
Engineering Controls: Use fume hood or dust extraction where small particles might escape
Protective Equipment: Wear chemical-resistant gloves, lab coat, and safety goggles; dust mask recommended for weighing or transferring powder
Hygiene Practices: Wash hands after handling and before leaving lab or workplace; do not touch face when working with powder
Environmental Controls: Monitor air for dust in environments with regular handling or research
Appearance: Off-white to beige crystalline powder
Odor: No strong odor recognizable
Solubility: Readily soluble in water; low solubility in organic solvents like ethanol or chloroform
Melting Point: Ranges between 165–170°C
pH (1% solution): Mildly acidic, depending on purity
Vapor Pressure: Negligible at room temperature
Decomposition Temperature: Above 170°C with release of toxic gases
Chemical Stability: Stable under normal storage conditions so long as moisture and excessive air are kept out
Reactivity: Serotonin can oxidize in presence of air or light, leading to loss of activity and color changes
Incompatible Materials: Strong oxidizers like hydrogen peroxide, concentrated acids, halogens
Hazardous Decomposition: Nitrogen oxides, carbon monoxide, and carbon dioxide produced if burned or heated to decomposition
Routes of Entry: Skin contact, inhalation, ingestion
Acute Effects: May cause skin or eye irritation; high doses in animals prompt involuntary muscle spasms, vomiting, or cardiac effects
Chronic Exposure: Not extensively studied in humans, but animal research suggests repeated contact could lead to allergic sensitization or local skin effects
Mutagenicity, Carcinogenicity, Reproduction: No clear evidence for serotonin being mutagenic, carcinogenic, or affecting reproduction in mammals
Medical Monitoring: Laboratory settings with regular exposure should offer health monitoring for workers
Aquatic Toxicity: Serotonin in small concentrations affects fish behavior and physiology; persistent leaks into waterways could disrupt ecosystems
Persistence and Degradability: Degrades relatively quickly in sunlight and via microbial action, but breakdown products may linger in soil or water
Bioaccumulation: Current evidence does not show strong buildup in tissues, but ongoing research needed
Other Hazards: Large uncontrolled releases may interfere with soil microfauna or aquatic microbial systems
Recommended Disposal: Collect as hazardous organic waste; use authorized incinerator or chemical disposal service
Do Not: Flush down drains or landfill untreated, as this risks contaminating water systems
Container Cleaning: Rinse empty containers before recycling; dispose of rinsate as hazardous waste
Special Precautions: Avoid generating dust during cleanup or handling for disposal
Transport Classification: Not considered dangerous for routine transport by most ground or air carriers in small research quantities
Precautions: Ship in sealed containers; protect from moisture, sunlight, and high temperatures during transit
Spill Response: Contain and clean using tools for hazardous powders; alert authorities for significant releases during transport
International Status: Not specifically regulated as a hazardous substance under most chemical safety frameworks, but local, state, or country rules may apply to research use
Occupational Exposure Limit: No established legal exposure limits; standard chemical hygiene practices apply
Environmental Restrictions: Laboratories or facilities using serotonin must follow rules regarding disposal, reporting accidental releases, and maintaining records of use where required
