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Chemical name: 2,4-Dimethylaniline
Common names: 2,4-Xylidine
Chemical formula: C8H11N
Molecular weight: 121.18 g/mol
Appearance: Colorless to pale yellow liquid or solid, depending on temperature
Odor: Aromatic, amine-like scent noticeable at low levels
Uses: Found in manufacturing of dyes, pigments, pharmaceuticals, and as chemical intermediates
Classification: Harmful if swallowed, toxic if inhaled, irritating to skin and eyes
Acute exposure risks: Inhalation may cause headaches, dizziness, weakness, and respiratory issues; skin or eye contact burns; ingestion nausea, vomiting, and abdominal pain
Chronic effects: Prolonged exposure can lead to organ toxicity, liver or kidney function reduction, and methemoglobinemia (reduced oxygen delivery in blood)
Environmental impact: Toxic to aquatic life, can cause long-term effects on water environments if released in large quantities
GHS pictograms: Skull and crossbones, exclamation mark, environmental hazard symbol appear on properly labeled containers
Main ingredient: 2,4-Dimethylaniline (purity commonly above 98%)
Impurities: Trace amounts of related methylated anilines, residual solvents from production possibly present
Typical contaminant risk: High purity batches reduce risk of unexpected reactions, but incomplete purification can introduce unknowns
Inhalation: Get to fresh air right away, seek medical attention if symptoms like drowsiness, shortness of breath, or blue-tinged lips appear
Skin contact: Remove contaminated clothing, wash exposed skin thoroughly with soap and water for several minutes
Eye contact: Rinse with large amounts of water for at least 15 minutes, lifting eyelids repeatedly, and get professional medical help
Ingestion: Never induce vomiting, rinse mouth, and go directly to an emergency facility; watch for confusion or rapid breathing
Delayed effects: Symptoms may develop hours after exposure, especially for methemoglobinemia; monitor for changes in skin color or consciousness
Suitable extinguishers: Use dry chemical, carbon dioxide, foam, or fine water spray; water jets may spread small fires
Hazardous combustion products: Burning releases toxic gases, including nitrogen oxides and carbon monoxide, plus heavy dense smoke
Protective equipment: Firefighters choose self-contained breathing apparatus and full protective gear, keeping skin and airways covered
Explosion risk: Vapors may form explosive mixtures with air if enough vapor collects above the flash point
Additional notes: Cool nearby containers with water spray to prevent pressure buildup and possible rupture
Personal precautions: Wear chemical-resistant gloves, safety goggles, splash-proof clothing, and respiratory protection if fumes are present
Spill containment: Prevent entry into drains, water courses, or soil; use sand, earth, or inert absorbent to contain slow leaks
Cleanup: Gather residue with non-sparking tools, collect liquids in covered non-metal containers, and wash area with detergent and water afterwards
Ventilation: Air out the area; increased ventilation keeps vapors dispersed and reduces inhalation danger
Safe handling: Avoid breathing vapors, avoid contact with eyes, skin, or clothing; wash hands thoroughly after use and remove contaminated garments quickly
Storage recommendations: Keep containers tightly sealed, in cool, well-ventilated, dry storage areas away from oxidizers, acids, and ignition sources
Handling tips: Keep away from food, drink, and smoking materials; limit use to trained personnel in suitable facilities
Exposure limits: Occupational exposure limits exist in some countries (e.g., ACGIH recommends a threshold limit value—verify with local guidance)
Engineering controls: Use chemical fume hoods or effective local exhaust systems in workspaces
Personal protective equipment (PPE): Splash goggles or face shield, nitrile or neoprene gloves, lab coats or full-body suits, NIOSH-approved respirators if airborne concentrations climb above safe levels
Hygiene practices: Regular hand washing crucial, especially before eating or drinking; change work clothes before going home
Physical state: Liquid or low-melting solid, can solidify near room temperature
Boiling point: About 228–229°C
Melting point: 45–47°C
Flash point: Close to 105°C (open cup)
Solubility: Limited in water, more soluble in organic solvents like ethanol, ether, and benzene
Odor threshold: Detectable at low concentration due to aromatic amine character
Vapor pressure: Relatively low at room temperature, but enough to create inhalation hazard in confined areas
Chemical stability: Stable under recommended handling and storage conditions
Reactive hazards: Vigorous reactions with strong oxidizing agents and acids can occur; heat and light can gradually degrade the compound
Incompatibilities: Avoid contact with oxidizers, acyl/alkyl halides, nitrating and hydrogenating agents
Decomposition: Overheating releases harmful gases, such as toxic nitrogen oxides
Routes of exposure: Entry through inhalation, ingestion, skin, and eyes
Acute toxicity: Notable for causing cyanosis, dizziness, headache, weakness; can depress the nervous system and interfere with blood’s oxygen-carrying ability
Irritation: Causes burns or irritation on contact with skin or eyes, risk of severe tissue damage after prolonged exposure
Sensitization: Some evidence suggests repeated skin exposure can trigger allergic reactions in sensitive people
Organ effects: Liver, kidneys, and blood most affected by long durations or high levels of exposure
Aquatic toxicity: Harmful to aquatic organisms, even in relatively small amounts
Persistence: Slow to biodegrade under natural conditions, so it can build up in soils and sediments near waste sites
Bioaccumulation: Limited data, but chronic exposure could increase risks to organisms higher up the food chain
Environmental release: Best to avoid any spills or disposal in natural waterways to limit unintended ecosystem damage
Disposal methods: Send waste and contaminated material to licensed chemical waste facilities familiar with hazardous organics
Regulatory requirements: Follow local environmental agency rules that cover amine disposal, and secure official documentation
Precautions: Never flush into sewers, landfills, or ground; incineration at specialized plants minimizes risk of ground and water contamination
Shipping classification: Hazardous for transport under most international and national regulations
Proper shipping name: Often shipped as 2,4-Xylidine
Packing group: Typically assigned moderate danger status; verify with transport authority current labeling standards
Handling advice: Use leak-proof, durable containers; keep away from heat, sparks, open flames during transport; alert transporters to hazards before movement
Occupational regulations: Recognized as hazardous under many chemical safety schemes, including OSHA, EU REACH, and others
Labeling: Containers carry clear, direct warning symbols and hazard phrases
Environmental rules: Environmental release tightly controlled in many regions; emissions, disposal, and workplace exposures monitored closely by agencies
Worker rights: Employees have legal access to safety training, personal protective equipment, and information about chemical dangers
