Dipropylene Glycol n-Butyl Ether (DPnB)

   Product Name: Dipropylene Glycol n-Butyl Ether
   CAS No.: 29911-28-2
   Synonyms / IUPAC Name: Di(propylene glycol) butyl ether; 1-(2-Butoxy-1-methylethoxy)-2-propanol (mixture of isomers)
   Molecular Formula: C₁₀H₂₂O₃
   Molecular Weight: ~190.28 g/mol
   Appearance: Colourless to light yellow liquid

Physicochemical Properties (Typical)

• Boiling Point: ~222–232 °C at atmospheric pressure
• Density: ~0.913 g/cm³ at 25 °C
• Refractive Index: n²⁰ᴰ ≈ 1.426
• Solubility in Water: ~40 g/L at 25 °C (very low to moderate)
• Flash Point: ~96 °C (closed cup)
• Other Notes: Low volatility; good solvent characteristics with slow evaporation rate; stable under normal conditions but incompatible with strong oxidising agents.

Purity & Quality Standards

• Typical Purity: ≥98.5% (by assay)
• Appearance: Clear liquid, free from visible particulates or haze.
• Specification Indicators: Assay of active substance, moisture content, acid value, refractive index, and density; batches should meet consistent specifications.
• Storage Recommendation: Store sealed in a cool (<30 °C), dry, well-ventilated place; protect from direct sunlight and strong oxidisers.

Applications / Uses

• Used as a slow-evaporating solvent or coalescent in coatings (especially waterborne), inks, adhesives, and resins — enhances film formation, leveling, and surface performance.
• Employed in cleaning and degreasing formulations requiring low volatility and excellent solvency for oils, waxes, and greases.
• Acts as a coupling solvent in printing inks and textile dyeing to improve solvency, wetting, and adhesion.
• Used as an intermediate or component in specialty chemical formulations due to glycol-ether functionality and favourable solvency profile.

Safety & Handling

• Flammability: Combustible liquid; vapours may form flammable mixtures under certain conditions.
• Health Hazards:
• Inhalation: High vapour concentrations may cause dizziness or respiratory irritation.
• Skin Contact: Prolonged or repeated contact may cause mild irritation.
• Eye Contact: May cause moderate irritation.
• Precautions:
• Use in well-ventilated areas or under suitable exhaust systems.
• Wear protective gloves, goggles/face shield, and appropriate clothing.
• Avoid heat, ignition sources, static discharge, and contact with strong oxidising agents.
• Reactivity / Incompatibilities: Avoid strong oxidising agents and strong acids/bases; high temperatures may cause decomposition releasing hazardous gases.

Packaging & Storage

• Packaging: Supplied in sealed containers suitable for industrial solvents (e.g., drums or high-quality barrels).
• Storage Conditions: Store in a cool (<30 °C), dry, well-ventilated environment, away from direct sunlight, moisture, and ignition sources; keep containers tightly closed when not in use.
• Shelf Life: Stable under recommended storage conditions; inspect container integrity and product appearance if stored for extended periods before use.