ASTM International - ASTM D4936-96

Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/ Titration

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Organization: ASTM International
Publication Date: 10 June 1996
Status: historical
Page Count: 9
scope:

1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with hydrogen sulfide gas (H2S) or 2-mercaptobenzothiazole.

1.2 Any free amine (HNR2) or weak acid salts of the corresponding amine (HX-HNR2) are titrated prior to reduction. This titer is used to calculate percent basic impurity (as free amine) in the sample.

1.3 With the indicated modifications, this test method is applicable to all MBT sulfenamides, that is, N-cyclohexyl-2-benzothiazolesulfenamide (CBS), N,N-diisopropyl-2-benzothiazyl sulfenamide (DIBS), 2 (morpholinothio) benzothiazole (MBS), N,N-dicylohexyl-2-benzothiazyl sulfenamide (DCBS), N-tert-butyl-benzothiazole-sulfenamide (TBBS), and 4-morpholinyl-2-benzothiazyl disulfide (MBSS).

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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. For specific hazard statements, see Section 9.

Document History

June 1, 2015
Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/Titration
1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with...
December 1, 2010
Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/Titration
1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with...
October 1, 2005
Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/Titration
1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with...
ASTM D4936-96
June 10, 1996
Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/ Titration
1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with...
June 10, 1996
Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/ Titration
1.1 This test method covers the determination of assay on mercaptobenzothiazole (MBT) sulfenamides. It is based on a titration of the basic amines liberated upon reduction of the sulfenamides with...
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