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ASTM D1747-99(2004)e1

Historical Reaffirmation

Standard Test Method for Refractive Index of Viscous Materials

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1.1 This test method covers the measurement of refractive indexes, accurate to two units in the fourth decimal place, of transparent and light-colored viscous hydrocarbon liquids and melted solids that have refractive indexes in the range between 1.33 and 1.60, and at temperatures from 80 to 100oC. Temperatures lower than 80C can be used provided that the melting point of the sample is at least 10oC below the test temperature.

1.2 This test method is not applicable, within the accuracy stated, to liquids having colors darker than ASTM Color No. 4, ASTM color as determined by Test Method D 1500, to liquids which smoke or vaporize readily at the test temperature, or to solids melting within 10oC of the test temperature.

Note 1 -- The instrument can be successfully used for refractive indices above 1.60; but since certified liquid standards for ranges above 1.60 are not yet available, the accuracy of measurement under these conditions has not been evaluated.

1.3 The values stated in SI units are to be regarded as standard. The values stated in inch-pound units are for information only.

1.4 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.


Refractive index is a fundamental physical property that can be used in conjunction with other properties to characterize pure hydrocarbons and their mixtures.

The use of refractive index in correlative methods for the determination of the gross composition of viscous oils and waxes often requires its measurement at elevated temperatures.

SDO ASTM: ASTM International
Document Number D1747
Publication Date May 1, 2004
Language en - English
Page Count 4
Revision Level 99(2004)e1
Supercedes
Committee D02.04.0D
Publish Date Document Id Type View
Oct. 1, 2009 D1747-09 Revision
April 10, 1999 D1747-99 Revision
Not Available D1747-62R78 Revision
May 1, 2019 D1747-09R19 Reaffirmation
June 1, 2014 D1747-09R14 Reaffirmation
May 1, 2004 D1747-99R04E01 Reaffirmation