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ASTM D 4936 : 2005

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/Titration

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Superseded by

ASTM D 4936 : 2010

Language(s)

English

Published date

10-01-2005

US$75.00
Excluding Tax where applicable

Committee
D 11
DocumentType
Test Method
Pages
8
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

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 (HXHNR2) 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.

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 .

ASTM D 5297 : 1995 : R2019 Standard Test Methods for Rubber Chemical Accelerator—Purity by High Performance Liquid Chromatography
ASTM D 5900 : 2017 : EDT 1 Standard Specification for Physical and Chemical Properties of Industry Reference Materials (IRM)

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