Standard Historical Last Updated: Aug 13, 2019
ASTM D4659-14

Standard Test Methods for Polyurethane Raw Materials: Determination of Specific Gravity of Isocyanates

Significance and Use

4.1 These test methods can be used for research or for quality control to characterize isocyanates used in polyurethane products.

4.2 A general test method for specific gravity using a digital density meter, which applies to isocyanates as well as other liquids is published in Test Method D4052.


1.1 These test methods determine the specific gravity of toluenediisocyanate and crude methylene-bis-(4-phenylisocyanate). These test methods also are applicable to many other liquids. (See Note 1.)

1.1.1 Test Method A—Specific gravity by pycnometer, for high-accuracy determination.

1.1.2 Test Method B—Specific gravity by hydrometer, for a less accurate, but rapid, determination.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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. For specific warning and precautionary statements see Section 7.

Note 1There is no known ISO equivalent to this standard.
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Book of Standards Volume: 08.02
Developed by Subcommittee: D20.22
Pages: 4
DOI: 10.1520/D4659-14
ICS Code: 83.040.30; 83.080.20