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Technical Data Sheet
Eastman™ n-Butyl Propionate

  • Architectural coatings
  • Auto OEM
  • Auto plastics
  • Auto refinish
  • Automotive
  • Commerical printing inks
  • General industrial coatings
  • Marine
  • Paints & coatings
  • Wood coatings
Key Attributes
  • Good solvent activity
  • High electrical resistance
  • Low MIR value
  • Low surface tension
  • Low water solubility
  • Mild odor
  • Non-HAP
  • Non-SARA
  • REACH compliant
  • Readily biodegradable
  • Slow evaporation rate
  • Urethane grade

Product Description
Eastman™ n-Butyl Propionate is a non-HAP, slow evaporating, and urethane grade solvent with good solvent activity for most coating resins. In lacquers and ambient cure enamels, this solvent is used as a retarder solvent. Its slow evaporation rate allows for flow and leveling but does not prevent the quick rubbing and sanding of the lacquer. Many resins are letdown in a solvent thinning tank to make handling, storing, and shipping easier. Eastman™ n-Butyl Propionate is useful as a letdown solvent because of its low volatility, good solvent activity, and urethane grade quality.

Since n-Butyl Propionate is not on EPA's HAP list, it is a good choice for replacing xylene in coating applications such as high-solids thermoset enamels. It is also used as a processing solvent for high-solids acrylic resins, and for coatings applied via electrostatic spray equipment.

Typical Properties

PropertyTypical Value, Units
Assay99.5 wt % min.
Autoignition Temperature427 °C
Boiling Point 
     @ 760 mm Hg145-149 °C (293-300 °F)
     Pt-Co10 max.
Dilution Ratio 
     VMP Naphtha1.1
Electrical Resistance>20 Megohms
Empirical FormulaC7H14O2
Evaporation Rate 
     (ether = 1)24.2
     (n-butyl acetate = 1)0.5
Flash Point 
     Setaflash Closed Cup36 °C (97 °F)
Freezing Point-75 °C (-103 °F)
Hansen Solubility Parameters 
     Hydrogen Bonding6.7
Molecular Weight130.19
Refractive Index 
     @ 20°C1.404
     in Water, @ 20°C0.4 wt %
     Water in, @ 20°C0.7 wt %
Specific Gravity 
     @ 20°C/20°C0.876
Surface Tension 
     @ 20°C25.3 dynes/cm
Vapor Density4.5
Vapor Pressure 
     @ 20°C3.0 mm Hg
     @ 55°C3.3 kPa
     @ 25°C, 8% CAB-381-0.530 cP
     @ 25°C, 8% RS 1/2-s NC28 cP
     @ 20°C0.87 kg/L (7.30 lb/gal)

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

10/13/2023 12:58:28 PM