ASTM-D5044 Standard Test Method for Rubber Compounding Materials—Free 2-Mercaptobenzothiazole (MBT) in Benzothiazyl Disulfide (MBTS)

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Standard Test Method for Rubber Compounding Materials—Free 2-Mercaptobenzothiazole (MBT) in Benzothiazyl Disulfide (MBTS)



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1.1 This test method covers the procedure for estimation of the acidic impurities in benzothiazyl disulfide (MBTS).

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.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

4.1 2-Mercaptobenzothiazole (MBT) is usually the major impurity in MBTS. Free MBT may be determined by this test method.

4.2 MBT and MBTS are used for rubber and latex vulcanization acceleration. The amount of MBT in MBTS may be of importance in predicting performance in rubber compounds and for raw material purchase and control.

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


mercaptobenzothiazole; mercaptobenzothiazole–disulfide;; ICS Number Code 83.060 (Rubber)

To find similar documents by ASTM Volume:

09.01 (Rubber, Natural and Synthetic -- General Test Methods; Carbon Black)

To find similar documents by classification:

83.060 (Rubber Raw rubber, see 83.040.10)

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Document Number


Revision Level

2006 R17 EDITION



Modification Type


Publication Date

July 1, 2017

Document Type

Test Method

Page Count

3 pages

Committee Number