ASTM-D4659 Historical Revision Information
Standard Test Methods for Polyurethane Raw Materials: Determination of Specific Gravity of Isocyanates

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


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 ASpecific gravity by pycnometer, for high-accuracy determination.

1.1.2 Test Method BSpecific 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 1—There is no equivalent ISO standard.

Significance and Use

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


density; hydrometer; isocyanates; polyurethane raw materials; pycnometer; specific gravity; Hydrometer analysis; Isocyanates; Polyurethane raw materials--isocyanates; Purity analysis--plastics; Pycnometer/pycnometry; Specific gravity--plastics; Toluene diisocyanate (TDI); ICS Number Code 83.040.30 (Auxiliary materials and additives for plastics); 83.080.20 (Thermoplastic materials)

To find similar documents by ASTM Volume:

08.02 (Plastics (II): D3222 - D5083)

08.03 (Plastics (III): D5117 - latest; Reinforced Plastic Piping Systems and Chemical Equipment; Plastic Building Products)

To find similar documents by classification:

83.040.30 (Auxiliary materials and additives for plastics Including fillers, extenders, hardeners, pigments, plasticizers, etc.)

83.080.20 (Thermoplastic materials)

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Modification Type


Publication Date

Feb. 1, 2009

Document Type

Test Method

Page Count

4 pages

Committee Number