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Technical Data Sheet
Eastman™ Isobutyric Anhydride

  • Cosmetic and personal care intermediate
  • Intermediates
  • Lubricants
  • Pharmaceutical chemicals

Product Description
Eastman™ Isobutyric Anhydride ([(CH3)2CHCO]2O) is a liquid with a boiling range of 180-187° C. It is used primarily in chemical processing and as a chemical intermediate.

Typical Properties

PropertyTypical Value, Units
Molecular Weight158.22
Empirical FormulaC8H14O3
Specific Gravity 
     @ 20°C/20°C0.95
Boiling Point182.5 °C (360.5 °F)
Freezing Point-53.5 °C (-64.3 °F)
Vapor Pressure 
     @ 20°C0.5 mm Hg
Refractive Index1.4 n(25°C/D)
     @ 25°C1.18 cP
Coefficient of Expansion 
     @ 20°C0.000886
     in Water, @ 25°CDecomposes
     Water In, @ 25°CDecomposes
Flash Point 
     Tag Closed Cup67 °C (153 °F)
     Tag Open Cup72 °C (161 °F)
Fire Point74 °C (166 °F)
Autoignition Temperature329 °C (625 °F)
Flammability Limits 
     Lower57.1 mg/L
     Upper369 mg/L
     @ 20°C0.95 kg/L (7.94 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.

6/22/2020 9:53:35 PM