Dibutyl Adipate

   CAS No.: 105-99-7
   Synonyms / IUPAC Name: Adipic acid dibutyl ester; Dibutyl hexanedioate
   Molecular Formula: C₁₄H₂₆O₄
   Molecular Weight: ~258.35 g/mol
   Appearance: Colourless to almost colourless clear liquid.

Physicochemical Properties (Typical)

• Melting Point: ~−32 °C
• Boiling Point: ~305 °C (lit.)
• Density: ~0.962 g/cm³ at 25 °C
• Refractive Index: n²⁰ᴰ ~1.436
• Solubility in Water: Very low (~35 mg/L at 25 °C)
• Flash Point: >230 °F (~110 °C, closed cup)
• Log P (octanol/water): ~4.17 – indicating high lipophilicity

Purity & Quality Standards

• Typical Purity: ≥99.0% by GC for commercial grades.
• Appearance: Clear liquid, free from visible particulates or haze.
• Standard Specification: Acid value ≤0.5.
• Storage: Keep container sealed in a cool, dark place (recommended <15 °C for long-term storage).

Applications / Uses

• Used as a plasticiser in resins (e.g., PVC) and polymer systems to improve flexibility and low-temperature performance.
• Employed in cosmetic formulations as a skin-conditioning agent or emollient.
• Applied in specialty chemical synthesis requiring a diester of adipic acid.
• Explored in advanced applications such as soft-robotic actuators and gel media due to its ester chemistry and compatibility.

Safety & Handling

• Flammability: Combustible liquid; vapour may form explosive mixtures with air though vapour pressure is very low.
• Health Hazards:
• Inhalation: Low volatility; prolonged exposure to vapour may affect the CNS.
• Skin Contact: Prolonged/repeated contact may cause mild irritation.
• Eye Contact: Direct exposure may cause irritation.
• Reproductive/Developmental: No significant reproductive toxicity observed under standard test conditions (NOAEL ~300 mg/kg/day in F1 generation).
• Precautions:
• Use only in well-ventilated areas.
• Wear suitable protective gloves and eye/face protection.
• Avoid heat, sparks, open flames, and hot surfaces.
• Ground and bond containers when transferring material.
• Reactivity / Incompatibilities: Avoid strong oxidising agents and prolonged heat; hydrolyses slowly under alkaline conditions.

Packaging & Storage

• Packaging: Supplied in sealed, solvent-compatible containers (e.g., metal drums) suitable for bulk chemical storage.
• Storage Conditions: Store in a cool (<30 °C), dry, well-ventilated area away from direct sunlight and ignition sources. Keep containers tightly closed when not in use.
• Shelf Life: Stable under recommended storage; verify container integrity and appearance before extended use.