Active Standard ASTM D4659 | Developed by Subcommittee: D20.22
Book of Standards Volume: 08.02
Historical (view previous versions of standard)
Significance and Use
These test methods can be used for research or for quality control to characterize isocyanates used in polyurethane products.
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 1—There is no equivalent ISO standard.
Note 1—There is no equivalent ISO standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D883 Terminology Relating to Plastics
D891 Test Methods for Specific Gravity, Apparent, of Liquid Industrial Chemicals
D1193 Specification for Reagent Water
E1 Specification for ASTM Liquid-in-Glass Thermometers
E100 Specification for ASTM Hydrometers
E202 Test Methods for Analysis of Ethylene Glycols and Propylene Glycols
UNSPSC Code 12352118(Cyanates or isocyanates or thiocyantes or isothiocyanates)