IP 158: Determination of oil content of waxes - Gravimetric method

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  • Method adopted/last revised: 1969
  • Method reapproved: 2001
  • REF/ISBN: IP158-2935231
  • Status: Current
  • First printed in STM books: January 1969


This method describes a test procedure for the determination of oil in petroleum waxes having a congealing point of 30 °C or higher as determined in accordance with ASTM D938-IP 76, Test for Congealing Point of Petroleum Waxes, Including Petrolatum, and containing not more than 15% of oil.

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