Standard Test Method for
Solvent Extractables in Petroleum Waxes1
This standard is issued under the fixed designation D 3235; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1.1 This test method covers the determination of solvent
extractables in petroleum waxes.
1.2 The values stated in acceptable metric units are to be
regarded as the standard. The values in parentheses are for
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
E 1 Specification for ASTM Thermometers2
E 128 Test Method for Maximum Pore Diameter and Permeability of Rigid Porous Filters for Laboratory Use3
3. Summary of Test Method
3.1 The sample is dissolved in a mixture consisting of 50
volume % methyl ethyl ketone and 50 volume % toluene. The
solution is cooled to −32°C (−25°F) to precipitate the wax,
then filtered. The solvent extractables content is determined by
evaporating the solvent from the filtrate and weighing the
4. Significance and Use
4.1 The solvent extractables in a wax may have significant
effects on several of its properties such as strength, hardness,
flexibility, scuff resistance, coefficient of friction, coefficient of
expansion, melting point, and staining characteristics. Whether
these effects are desirable or undesirable depends on the
intended use of the wax.
5.1 Filter Stick and Assembly, consisting of a 10-mm
diameter sintered glass filter stick of 10 to 15 µm maximum
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