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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.
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
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
E100 Specification for ASTM Hydrometers
E202 Test Methods for Analysis of Ethylene Glycols and Propylene Glycols
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
ICS Number Code 83.040.30 (Auxiliary materials and additives for plastics); 83.080.20 (Thermoplastic materials)
UNSPSC Code 12352118(Cyanates or isocyanates or thiocyantes or isothiocyanates)
ASTM D4659-14, Standard Test Methods for Polyurethane Raw Materials: Determination of Specific Gravity of Isocyanates, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top