ASTM D 5051 - 06 Standard Test Method for Rubber Compounding Materials - Benzothiazyl Disulfide (MBTS) - Assay

American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2006. Published October 2006. Originally
approved in 1990. Last previous edition approved in 2002 as D 5051 – 02. 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.