Diphenyl thiourea (DPTU)

Diphenyl thiourea is an accelerator and activator for neoprene rubber and ethylene-propylene-diene terpolymers for the improvement of the flowing properties of the starting materials in the production of rubber.

Skin contact with diphenyl thiourea is required for it to cause a rash. Discontinuation of exposure to products containing diphenyl thiourea should result in improvement and/or resolution of your dermatitis. At work, request a Safety Data Sheets (SDS) to help identify potential sources of exposure.

Patients who are photoallergic to thiourea should either avoid contact with photocopy paper and photographic developing or should change to a non-thiourea containing process. Although very unlikely, such patients may react to certain rubber products or adhesive agents and should discuss any such problems with their physician.