ASTM D4876-98 PDF

Scope: 1.1 This test method determines the total acidity, expressed as HCl, of crude or modified isocyanates. The test method is applicable to products derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenylisocyanates. (See Note 1.) 1.2 The values stated in SI units are to be regarded as the 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 hazards statements see 7.1 and Note 2. NOTE 1—There is no equivalent ISO standard.

ASTM D4876-98 Referenced Document

ASTM D1193 Standard Specification for Reagent Water*， 1999-04-21 Update
ASTM D841 Standard Specification for Nitration Grade Toluene
ASTM D883 Standard Terminology Relating to Plastics*， 2024-02-01 Update
ASTM E180 Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals*， 1999-04-21 Update
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method*， 1999-04-21 Update

1998 ASTM D4876-98 Standard Test Method for Polyurethane Raw Materials Determination of Acidity of Crude or Modified Isocyanates