ASTM-D4936 2001

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D4936-96(2001) Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/ Titration

Published By	Publication Date	Number of Pages
ASTM	2001	8

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Categories: 71.080.30 - Organic nitrogen compounds, ASTM

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Description

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 (H ₂ S) or 2-mercaptobenzothiazole.

1.2 Any free amine (HNR ₂ ) or weak acid salts of the corresponding amine (HX-HNR ₂ ) 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.

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PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Interferences Apparatus Reagents FIG. 1
3	Hazards Sampling Calibration and Standardization FIG. 2
4	Procedure Calculation
5	Report Precision and Bias
6	Keywords TABLE 1
7	X1. TITRATION CURVES X1.1 X1.2 X1.3 X1.4 TABLE 2 TABLE 3 FIG. X1.1 FIG. X1.2
8	FIG. X1.3

Additional information

Standard Title	D4936-96(2001) Standard Test Method for Mercaptobenzothiazole Sulfenamide Assay by Reduction/ Titration
Published Code	ASTM
Publication Date	2001
Pages Count	8
ICS Codes	71.080.30 - Organic nitrogen compounds

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ASTM-D4936 2001

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