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ASTM D5051-06

Current Revision

Standard Test Method for Rubber Compounding Materials—Benzothiazyl Disulfide (MBTS)—Assay

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1.1 This test method covers the determination of assay of benzothiazyl disulfide (MBTS). It is based on a titration of free iodine liberated upon reduction of MBTS, with potassium iodide (KI) in acid medium.

1.2 The assay is determined as mass percent.

1.3 Free 2-mercaptobenzothiazole (MBT) content is not determined.

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

1.5 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.


The test method is designed to assess the purity of MBTS, which is used for rubber and latex vulcanization acceleration. The amount of MBTS is of importance in predicting performance in rubber compounds and for raw material purchase and control.

This test method may be used as a quality control tool and for research and development work.

SDO ASTM: ASTM International
Document Number D5051
Publication Date Oct. 1, 2006
Language en - English
Page Count 3
Revision Level 06
Supercedes
Committee D11.11
Publish Date Document Id Type View
Oct. 1, 2006 D5051-06 Revision
June 10, 2002 D5051-02 Revision
Nov. 10, 1997 D5051-97 Revision
Nov. 1, 2021 D5051-06R21E01 Reaffirmation
May 1, 2017 D5051-06R17 Reaffirmation
May 1, 2012 D5051-06R12 Reaffirmation