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Chemical Name: 1-Diethylamino-4-Aminopentane
Common Synonyms: This compound sometimes pops up in labs as N,N-Diethyl-1,4-pentanediamine.
CAS Number: 104-84-7
Molecular Formula: C9H22N2
Recommended Use: Used as an intermediate in organic synthesis and occasionally in specialty chemical applications. If you’ve ever seen it logged, it’s not a household chemical and rarely supplied to consumer markets. Researchers in custom synthesis circles cross paths with it the most, usually in controlled settings.
Signal Word: Warning
Hazard Statements: Causes skin irritation. Risk of eye damage. Harmful if swallowed or inhaled. Unlike some other diamines, vapors and dust may cause noticeable throat and airway irritation in confined spaces. Symptoms may not always hit right away.
Pictograms: Exclamation mark. Corrosive symbol if concentration is higher.
Routes of Exposure: Skin, inhalation, ingestion, eye contact.
Precautionary Statements: Always use gloves and goggles, plus decent ventilation. Never skimp on PPE where this stuff is involved.
Chemical Identity: N,N-Diethyl-1,4-pentanediamine
Concentration: Most preparations in labs run close to pure, with dilution only for very niche uses.
Impurities: Trace related amines in crude batches if tolerance allows; pure material sought in sensitive research work.
Eye Contact: Rinse eyes with clean water for several minutes. Remove contact lenses. You won’t want to risk waiting—get that rinsed out.
Skin Contact: Wash area with soap and water. Remove contaminated clothes. Best not to let this linger on your skin if possible.
Inhalation: If breathing turns shallow or labored, move to fresh air right away. Oxygen sometimes needed; medical help recommended.
Ingestion: Rinse mouth, do not induce vomiting. Professional medical intervention matters here. Experience tells me calling poison control makes sense, regardless of symptoms appearing right away or not.
Symptoms to Watch: Burning sensation, coughing, redness, potential for respiratory distress with heavy exposure.
Suitable Extinguishing Media: Dry chemical, foam, or carbon dioxide. Water fog can help but tends to spread liquid.
Specific Hazards: Vapors may form flammable mixtures above certain concentrations. Combustion gives off ammonia, nitrogen oxides, and sometimes unburned amines.
Protective Actions: Firefighters need full gear and self-contained breathing apparatus. Staying upwind is smart. My own experience in industrial settings says not to take, “it’s probably okay,” for an answer with amines under heat.
Personal Precautions: Gloves, goggles, face shield, good ventilation—standard lab setup isn’t always enough if spill volume is high.
Cleanup Methods: Absorb with inert material like sand. Place in a chemical waste container. Wash spill site with detergent and water.
Environmental Protection: Prevent runoff into sewers. I’ve learned to check sump alarms; small spills spread fast without notice.
Handling Precautions: Avoid direct contact. Always work in ventilated fume hoods if possible. Open containers slowly to let pressure equalize.
Storage Conditions: Store in cool, dry, well-ventilated area. Keep away from acids, oxidizers, moisture. Sealed containers matter—a cheap jar risks more in the long run. I remember more than one ruined bench from skipping proper storage.
Hygiene Measures: Wash hands thoroughly after handling, before eating or drinking, and before leaving work. Contaminated clothes go immediately to cleaning.
Engineering Controls: Fume hoods, local exhaust ventilation, splash guards near dispense points.
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene preferred), goggles or face shield, lab coat.
Respiratory Protection: If ventilation isn’t solid, use an approved cartridge respirator.
Monitoring: Airborne levels in small labs should be tracked if handling large quantities or running volatile reactions.
Appearance: Clear to pale yellow liquid
Odor: Strong, ammonia-like, distinctly fishy
Melting Point: Below room temperature
Boiling Point: High, upwards of 200°C
Solubility: Readily dissolves in water and many organic solvents
Vapor Pressure: Moderate at room temp
Flash Point: Can ignite; exact value varies, typically well above room temp.
Partition Coefficient: Shows decent distribution to organic phases; hydrophilic yet still absorbed quickly by skin.
Chemical Stability: Stable under anticipated storage and lab conditions; keep away from moisture and acids.
Reactivity: Reacts with acid chlorides, anhydrides, strong oxidizers, strong acids. Provides strong nucleophilicity in amine reactions.
Decomposition Products: Under fire or long storage, releases nitrogen oxides, ammonia, and amine fumes, all an irritant hazard.
Acute Toxicity: Harmful by ingestion, inhalation, or skin absorption. Studies point to moderate oral toxicity (rat oral LD50 reports in the low grams per kilogram range).
Skin and Eye Irritation: Strong irritant; blisters or persistent redness not uncommon in cases of inadequate washing.
Chronic Effects: No firm evidence of cancer risk in humans; repeated contact can cause dermatitis.
Inhalation Hazard: Short-term exposure at high concentrations brings headache, nausea, coughing. My experience matches the literature on fast onset of discomfort in confined work.
Aquatic Toxicity: Moderately toxic; disrupts aquatic organisms in concentrated spills.
Persistence and Degradability: Not readily biodegradable in water; lingers in soils and waterways.
Bioaccumulation: Less likely due to hydrophilic nature, yet still sticks around long enough to matter where containment fails.
Environmental Fate: Lab stories tell the same tale—avoid sewer drains and double-check for leaks, as this compound’s breakdown releases components tough for treatment plants to scrub entirely.
Waste Treatment Methods: Collect all residue and soaked absorbents for regulated hazardous waste disposal.
Contaminated Packaging: Empty containers should be triple-rinsed then sent to chemical waste collection.
Regulatory Notes: Diluting in sinks is not responsible. My own view is no lab stays out of trouble long by cutting corners with disposal, especially when the risks to wastewater and soil add up quickly.
UN Number: Typically classified as hazardous for shipping due to toxicity and caustic nature.
Transport Hazard Class: Standard chemical transport calls for marking and containment without leaks.
Packing Group: Identified as mid-range for personal and environmental damage in event of accident. From my own logistics experience, labeling and double containment are non-negotiable—no one wants spills during transit.
OSHA Status: Regulated as a hazardous chemical under worker safety guidelines.
TSCA Status: Listed on U.S. inventories for industrial use, with tight controls on research-scale purchase and application.
EU Classification: Assigned risk codes for irritation, toxicity, and environmental threat.
Community Right-to-Know: Covered by reporting standards in most developed jurisdictions. Even small-quantity users carry the same rules on labeling, disposal, and reporting significant incidents. Those who cut corners, in my experience, face headaches during audits and when trouble hits.
Labeling: Always labeled with standard hazard icons, risk phrases, and safety advice. Clear, legible labeling protects more than just box-checking for compliance—it’s the frontline against accidental harm.
