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Chemical name: 4-Amino-N,N-Dimethylaniline
Other names: p-(Dimethylamino)aniline, p-Amino-N,N-dimethylaniline
CAS Number: 99-98-9
Appearance: Light gray to brown powder, sometimes with a faint amine-like odor
Common use: Frequently seen in dye and pigment manufacture, chemical research, sometimes as an intermediate for pharmaceuticals
Physical state: Solid at room temperature, turns to liquid only upon melting
Health risks: Toxic if swallowed, inhaled, or absorbed through the skin; targets central nervous system, blood, and liver; suspected carcinogen based on animal data
Environmental hazard: Harmful to aquatic life, persistent in soil and water when released in significant quantities
Signal words: Danger due to acute toxicity and potential for long-term damage
Noticeable symptoms: Headache, nausea, dizziness, cyanosis, and possibly respiratory difficulty after significant exposure
Active chemical: 4-Amino-N,N-Dimethylaniline
Purity: Commercial grades often exceed 97% active compound
Impurities: Trace amounts of other aromatic amines; likely negligible but always relevant for sensitive environments or high-purity requirements
Inhalation: Remove person to fresh air, watch for breathing difficulty, get medical advice if symptoms persist
Skin exposure: Remove contaminated clothing, wash area with soap and water, seek medical attention for irritation
Eye contact: Rinse cautiously with water for several minutes, check for contact lenses, continue rinsing and call for help as soon as discomfort continues
Ingestion: Rinse mouth, do not induce vomiting, seek immediate medical attention; toxic compounds call for urgent care
Suitable extinguishing agents: Dry chemical powder, foam, carbon dioxide; water spray to cool containers but avoid direct discharge
Hazards from combustion: Produces toxic fumes like nitrogen oxides, carbon monoxide, and other hazardous organic compounds upon burning
Precautions for firefighters: Wear self-contained breathing apparatus, full protective gear; keep unnecessary people away from danger zone
Fire point: Solid material, may decompose rather than ignite easily but generates noxious smoke quickly if burning
Personal protection: Use gloves, dust mask, chemical goggles; avoid breathing dust, keep skin covered
Containment: Scoop up material, avoid creating dust, ventilate the spill area
Environmental prevention: Prevent runoff into soil and water, sweep up immediately, use suitable absorbent material for trace amounts
Cleanup: Place in properly labeled containers, dispose following waste regulations, thoroughly wash spill site to avoid lingering contamination
Storage temperature: Store in cool, dry, well-ventilated space, away from direct heat or sunlight
Incompatibilities: Strong oxidizers, acids, silver salts, and hypochlorites can trigger unexpected reactions; do not mix
Personal hygiene: Always wash hands after handling, keep food and beverage clear of workspace
Handling advice: Use protective gloves and eyewear, minimize airborne dust, work under a fume hood whenever possible
Ventilation: Use local exhaust or general ventilation to maintain airborne concentrations below recommended limits
Protective clothing: Impervious gloves, safety goggles, lab coat or coveralls; chemical-resistant footwear if large quantities handled
Respiratory protection: Use approved respirator if dust exceeds recommended exposure level or if ventilation is inadequate
Exposure limits: No widely established occupational exposure limits, but safe handling always means keeping exposure as low as possible
Appearance: Beige to light brown crystalline powder or small flakes
Molecular formula: C8H12N2
Molecular weight: 136.19 g/mol
Melting point: Ranges from 61 to 63°C, easily melts in typical laboratory heating conditions
Solubility: Slightly soluble in water, easily dissolves in many organic solvents like ethanol or ether
Vapor pressure: Low volatility at room temperature, so significant inhalation risk arises more from powders than fumes
Odor threshold: Detectable amine smell at high levels
Chemical stability: Stable under recommended storage conditions, but exposure to strong oxidants quickly triggers decomposition
Hazardous reactions: Risk of violent reaction with acids or oxidizing agents; generates toxic fumes if heated or combusted
Decomposition products: Nitrogen oxides, carbon monoxide, other low-molecular weight organics when broken down by heat
Incompatible materials: Strong acids, oxidizers, and certain metals in solution
Exposure routes: Inhalation, dermal contact, ingestion, potential absorption through mucous membranes
Acute effects: Central nervous system depression, methemoglobinemia leading to cyanosis, confusion, and in severe cases, loss of consciousness
Chronic effects: Repeated exposure linked to liver and blood cell issues, potential bladder carcinogen per older rodent studies
Symptoms of overexposure: Headaches, dizziness, blue lips or skin, persistent nausea or vomiting after ingestion
Sensitization: Occasional reports of skin sensitization among workers in dye manufacture
Long-term risks: Carcinogenic potential based on certain studies, though human evidence remains limited
Aquatic toxicity: Harmful to fish and aquatic invertebrates, even at low concentrations; substance tends to linger in surface water
Soil mobility: May bind to soil particles yet still risks entering groundwater via runoff or improper disposal
Biodegradability: Degrades slowly under standard environmental conditions, especially in the absence of sunlight or bacteria
Bioaccumulation: Could accumulate in aquatic organisms, raising concerns about long-term exposure in much the same way as legacy pollutants from dye industries
Ecological advice: Limit release to water systems, keep waste tracked and contained; treatment at approved chemical facilities reduces risk downstream
Preferred disposal method: Incineration at an approved chemical waste facility offers secure destruction
Alternate disposal: Sometimes allowed in specially lined landfills if properly contained, but regulations vary by region
Do not: Flush to sewer, dispose down the drain, or leave in general solid waste streams; consider hazardous status at every step
Container handling: Triple rinse then dispose as hazardous chemical waste, with labels intact for traceability
UN number: Classified as hazardous for international shipment under most chemical transport codes
Transport hazard class: Poison toxic solid, organic, n.o.s. classification in many national systems
Packing group: Group II or III, depending on concentration and formulation
Precautions: Secure containers, avoid temperature extremes, transport only in tight drums or sealed bags marked with toxic warnings; shipping documentation must mention all relevant danger codes
Global chemicals lists: Found on inventories maintained by the EPA, European EINECS/REACH, Canadian DSL, and similar agencies
Label elements: Skull and crossbones pictogram, toxic warnings, precautionary statements about personal protective equipment
Workplace rules: Occupational health guidance in many jurisdictions mandates training, spill response readiness, routine exposure reviews, and periodic health checks for those in regular contact
Pertinent legislation: Environmental releases restricted under clean water and air acts, industrial sites subject to immediate reporting obligations for accidental spills above certain thresholds
