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Chemical Name: 1,2,3,4-Tetrahydroquinoline
Common Synonyms: Tetrahydroquinoline
Chemical Formula: C9H11N
Appearance: Typically, this compound shows up as a slightly yellow to colorless liquid
Odor: Has a faint, characteristic amine-like smell
Primary Use: Involved in organic synthesis, dye manufacturing, and as a lab reagent
GHS Classification: Harmful if swallowed, irritating to skin and eyes, combustible liquid
Pictograms: Exclamation mark, Health hazard
Main Hazards: Can irritate respiratory tract, skin, and eyes on contact; risk of headache, dizziness, or nausea
Chronic Effects: Prolonged skin contact may cause dermatitis; repeated exposure brings risk of sensitization
Environmental Impact: Potential for some aquatic toxicity if spilled
Component: 1,2,3,4-Tetrahydroquinoline
Purity: Usually above 95%, though lab grade material may vary with trace impurities
Other Ingredients: Normally sold as a pure substance; impurities stem from production byproducts
Inhalation: Get out to fresh air, keep breathing steadily, and seek medical attention when breathing trouble doesn’t subside
Skin Contact: Wash area with water and soap; remove contaminated clothes promptly
Eye Contact: Rinse carefully for several minutes under running water;
Ingestion: Rinse mouth, don’t induce vomiting, see a healthcare provider quickly
Suitable Extinguishing Media: Water spray, foam, dry chemical powder, or carbon dioxide for small fires
Specific Hazards: Gives off toxic nitrogen oxides upon burning points out the need for respiratory protection
Protective Equipment: Use self-contained breathing apparatus and full protective gear if tackling a significant blaze
Personal Precautions: Use gloves and goggles, ventilate area well, avoid breathing vapor
Environmental Precautions: Keep out of drains, sandbag if needed to prevent access to watercourses
Clean-Up Methods: Soak up with inert absorbent such as vermiculite, place in labeled containers for disposal, wash spill area thoroughly
Handling: Work in well-ventilated area, prevent contact with eyes, skin, or clothing, avoid inhaling vapors
Storage: Keep container tightly sealed in cool, dry place out of direct sunlight, away from oxidizers, acids, and ignition sources
Exposure Limits: No strict occupational limits in some regions, though prudent labs treat it on par with similar aromatic amines
Respiratory Protection: Use organic vapor cartridge respirators if exposure risk is present
Skin/Eye Protection: Wear chemical-resistant gloves, goggles, and lab coats
Ventilation: Use local exhaust or fume hood especially during larger scale synthesis
Appearance: Pale yellow to colorless liquid
Melting Point: Around -30°C
Boiling Point: Roughly 245°C
Solubility: Slightly soluble in water but mixes with common organic solvents
Vapor Pressure: Low at room temperature, so not much evaporation risk, but not negligible
Odor Threshold: Difficult to pinpoint, typical of amines
Chemical Stability: Stable under standard lab and storage conditions
Incompatible Materials: Strong oxidizers can cause hazardous reactions, acidic solutions can hydrolyze the compound
Hazardous Decomposition: Burns to release nitrogen oxides and possibly other toxic gases
Polymerization: No known tendency to polymerize dangerously, but always better safe than sorry in bulk storage
Acute Toxicity: Animal studies point to moderate oral toxicity; skin and eye irritation proven in standard models
Routes of Exposure: Inhalation, skin, eye, ingestion
Symptoms: Contact can cause redness, pain; heavy inhalation causes headache, dizziness, or nausea
Chronic Exposure: No well-documented case reports for humans, but long-term lab exposure to some quinolines raises concern over cumulative toxicity
Aquatic Toxicity: Moderate risk to aquatic life based on related compounds
Persistence and Degradability: May degrade slowly in soil or water
Bioaccumulation Potential: Expected to be low, though incomplete data exists
Mobility in Soil: Spills may spread through soil but breaks down with time and sunlight
Waste Treatment Methods: Incineration in permitted facilities reduces environmental risk
Package Disposal: Empty containers still carry significant vapor risk, so triple-rinse or poke holes before discard
Local Regulation: Work with qualified hazardous waste contractors to meet local rules and minimize harm
UN Number: Not universally assigned, but certain regions require labeling as a flammable, irritating liquid
Transport Hazard Class: Usually falls under Class 3 (flammable liquids) or Class 6.1 (toxic substances), assessing both fire and health risk
Packing Group: Typically III, indicating lower immediate hazard but requiring sealed, upright containers
Environmental Hazards: Spills in transit can seep into drains and waterways, raising local environmental alarms
Special Precautions: Mark containers clearly, handle only with trained staff, keep manifest paperwork updated
Global Inventories: Registered or reportable in most major chemical inventories, including US TSCA and EU REACH lists
Safety Regulation: Workplaces in many countries must supply staff with adequate ventilation and PPE per national law
Environmental Rules: Spills must be reported to the proper environmental authority, especially near water
Community Right-to-Know: Many authorities require reporting storage and use of moderate stocks, even if not labeled as a major industrial toxin
Hazard Communication: Employers carry legal duty to train staff on proper handling, spill response, and disposal for this class of aromatic amines
