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Chemical Name: N,N-Dibutylaniline
CAS Number: 101-96-2
Common Uses: Often found in specialized dye manufacture, involved in organic synthesis and as an intermediate in research settings.
Appearance: Typically, this compound presents as a pale yellow to amber oily liquid with a faint aromatic odor.
Odor Threshold: Detectable, but not intensely pungent. Anyone working around it should notice its presence.
GHS Classification: Acute Toxicity-Oral, Skin Irritation, Eye Irritation, Specific Target Organ Toxicity
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin and eye irritation, can damage organs through prolonged exposure. Several studies confirm these hazards, reporting consistent irritation with direct exposure.
Pictogram: Exclamation mark (indicative of irritation), health hazard icon (for organ effects).
Routes of Exposure: Skin, eyes, inhalation, ingestion. Skin contact tends to be the most common due to the compound’s oily nature.
N,N-Dibutylaniline: Concentration typically above 97% in the forms used in chemical work.
Impurities: Trace side products or residual solvents may be present, though not usually in amounts that alter risk profiles.
Inhalation: Fresh air immediately, keep the person warm and at rest. Breathing difficulty can escalate, so immediate attention from health professionals helps.
Skin Contact: Remove contaminated clothing, wash skin with plenty of soap and water; persistent irritation calls for medical follow-up.
Eye Contact: Rinse eyes gently but thoroughly with water for at least 15 minutes. It’s easy to dismiss eye discomfort at first, but this chemical’s irritation can build up, so getting checked out matters.
Ingestion: Rinse mouth, avoid inducing vomiting if the person is conscious. Get professional medical attention because even a small amount can pose a risk of organ effects.
Flammability: Combustible liquid. Flames may flash if heated enough.
Extinguishing Agents: Foam, dry chemical powder, carbon dioxide. Water might spread contaminated runoff, so other options typically work better.
Specific Hazards: Burning can release irritating and toxic fumes, like nitrogen oxides.
Precautions for Firefighters: Use self-contained breathing apparatus, chemical-resistant clothing. Experience in the lab shows that vapors drift along surfaces, so ventilation counts for a lot.
Personal Protection: Use protective gloves, goggles, apron as splashes cause lasting irritation.
Spill Cleanup: Contain spill, absorb with inert material like sand or vermiculite. Avoid letting it enter drains or water sources. Collect residue in sealable chemical waste containers.
Ventilation: Open windows and use fans as vapors accumulate swiftly, especially in smaller rooms.
Handling: Use in well-ventilated areas, avoid breathing vapors. Wear gloves and goggles to prevent skin and eye contact. Spills and splashes have stubborn effects. Avoid rough handling as leaks crop up easily if containers are knocked over.
Storage: Store away from direct sunlight and strong oxidizers. Keep in tightly closed containers in a dry, cool, ventilated place. Anyone who’s dealt with leaking bottles knows how quickly storage becomes an issue.
Incompatibilities: Strong acids, bases, and oxidizing agents. Mixing with these can lead to unpredictable reactions.
Occupational Exposure Limits: No established limits in most countries; the lack of clear thresholds nudges workplaces to tighten up general precautions.
Engineering Controls: Fume hoods, local exhaust ventilation. Even small-scale bench work benefits from air movement.
Personal Protective Equipment: Chemical-resistant gloves, goggles, long sleeves or lab coat, closed shoes. Anyone with first-hand exposure knows the irritation that lingers from glove-free work.
Hygiene: Always wash hands after handling, keep food or drinks away from workstations where this compound is handled.
Appearance: Oily yellow liquid, sluggish to pour, tends to linger on surfaces.
Boiling Point: Around 324°C
Melting Point: Below room temperature, usually remains liquid unless cooled well below freezing.
Solubility: Not soluble in water but mixes well with most organic solvents.
Density: Roughly 0.91 g/cm³
Vapor Pressure: Low under ambient conditions, but noticeable with heating.
Odor: Aromatic, mild but persistent.
Chemical Stability: Stable at room temperature, stable in closed containers over time if kept away from light and air.
Decomposition Products: Toxic gases such as nitrogen oxides can form if burned or exposed to strong oxidizers.
Incompatible Materials: Acids, strong bases, strong oxidizers as mixing can trigger hazardous reactions.
Acute Toxicity: Can cause nausea, diarrhea, and abdominal pain if swallowed. Skin exposure leads to irritation that lasts, especially with repeated contact.
Chronic Effects: Animal studies suggest potential for organ damage with long-term exposure, though direct human experience is more limited.
Sensitization: Skin contact may cause delayed allergic reactions for some.
Eyes: Redness, watering, discomfort. Splashes lead to issues that take time to resolve.
Aquatic Toxicity: Harmful to aquatic life, can cause long-lasting effects in rivers or ponds. Spills outside the lab result in local wildlife disturbance, so preventing leaks or outdoor disposal matters.
Persistence and Degradability: Not readily biodegradable. Sticks around in sediments or soil for extended periods.
Bioaccumulation: Potential for accumulation in organisms if exposures are repeated.
Disposal Methods: Collect as hazardous waste. Do not pour down the drain; pass to a licensed chemical disposal service.
Container Disposal: Rinse and manage as hazardous waste. Cross-contamination hits hard in shared labs when bottles aren’t cleaned properly.
UN Number: None typically assigned for small research quantities.
Transport Hazards: Label as a chemical hazard. Take care to prevent spills during transit.
Special Precautions: Package upright, avoid transport with acids or oxidizers; insulate well to prevent leaks.
Regulations: Covered under workplace hazardous chemical standards. Employers must make safety data available and routine training a habit.
Packaging/Safety: Strict rules require clear labeling and lockable storage where unauthorized access is a risk.
