The compound is a symmetrical 1,3,5-triazine substituted at C-2 and C-4 with thiol groups and at C-6 with an anilino moiety. It is practically insoluble in water, soluble in hot DMF and dilute aqueous alkali (pH > 9) where it forms the corresponding dithiolate. 6-Phenylamino-1,3,5-triazine-2,4-dithiol is marketed as accelerator AF, ASH or Zisnet AF and is mainly used as a sulphur donor in the vulcanisation of halogen-containing rubbers (CR, CSM, CIIR) and in the sulphur-assisted adhesion of rubber to brass-plated steel cord. At 180–200 °C it releases reactive mercapto groups that insert into the elastomer chain and simultaneously form copper-sulphur bonds at the brass interface, giving composites with superior dynamic adhesion and ageing resistance. The product is also employed as a metal-surface passivator for copper and its alloys, forming an insoluble polymeric chelate film that suppresses corrosion in coolants and hydraulic fluids. Thermal decomposition starts above 300 °C and releases SOx, NH₃ and H₂S; therefore adequate ventilation is required during processing. The powder is non-flammable but may form explosive dust clouds; keep container tightly closed and store in a cool, dry place away from oxidants and strong bases.
