DI-N-BUTYLAMINE (DNBA)
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Category:
Aliphatic Amines
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Product Profile
1. Chemical Profile
Chemical Name: Di-n-Butylamine (DNBA)
Synonyms: N-Butylamine dimer, dibutylamine
CAS No.: 111-92-2
Molecular Formula: C₈H₁₉N
Molecular Weight: 129.24 g/mol
Appearance: Colorless to pale yellow liquid
Odor: Strong amine-like odor
Boiling Point: ~160–161 °C
Melting Point: –50 °C
Density (20 °C): 0.74 g/cm³
Solubility: Miscible with organic solvents; partially soluble in water
Reactivity: Flammable, reacts readily with acids to form salts; may form explosive mixtures with air
2. Industrial Applications
· Agrochemicals: Intermediate for herbicides, pesticides, and plant growth regulators
· Pharmaceuticals: Building block for APIs and specialty amines
· Rubber & Polymers: Vulcanization accelerator, polymerization intermediate
· Chemical Intermediates: Precursor for di-butylamine derivatives, surfactants, and quaternary ammonium compounds
· Specialty Chemicals: Used in corrosion inhibitors, textile auxiliaries, and leather processing
3. Safety and Toxicology
· Hazards:
o Skin: Causes irritation and possible burns
o Eyes: Severe irritation and damage possible
o Inhalation: Vapors may irritate respiratory tract
o Ingestion: Harmful if swallowed; may cause burns
· Toxicity:
o Oral LD₅₀ (rat): ~500 mg/kg
o Dermal LD₅₀ (rabbit): >1,000 mg/kg
o Inhalation LC₅₀ (rat, 4h): ~2,500 ppm
· Flammability: Highly flammable liquid and vapor (Flash point: 30 °C, Closed cup)
· PPE: Chemical-resistant gloves, goggles, face shield, protective clothing; ensure adequate ventilation
4. Storage and Handling
· Store in tightly sealed containers in a cool, dry, well-ventilated area
· Keep away from heat, sparks, flames, and incompatible chemicals
· Use explosion-proof equipment when handling
· Avoid inhalation and direct contact with skin or eyes
· Stable under recommended storage conditions
5. Environmental and Regulatory Compliance
· Environmental Impact: Toxic to aquatic life; avoid release into water systems
· Regulations:
o EU CLP: Flam. Liq. 3 (H226), Acute Tox. 4 (H302, H312, H332), Skin Irrit. 2 (H315), Eye Irrit. 2 (H319)
o OSHA (USA): Listed as hazardous chemical
o China GB 13690-2009: Classified as flammable and corrosive substance
· Transport:
o UN No.: 1123
o Hazard Class: 3 (Flammable liquid)
o Packing Group: II (medium danger)