20% active solution; recommended for use as a vulcanization accelerator as a polymerization shortstop, where reduction of volatile nitrosamines is desired. 50% active version is available on made to order basis. Suppliers, 20% active solution; recommended for use as a vulcanization accelerator as a polymerization shortstop, where reduction of volatile nitrosamines is desired. 50% active version is available on made to order basis. Manufacturers.