... urea but contains sulfur instead of oxygen. Thiourea is the main raw material ofproducing thiourea dioxide, which presents a white sheen ... used as rubber accelerator,floating agent, photo developing agent, prexide thiourea, cold wave etc. It is also used inresin compression ... T3266-1988 )Specifications Best grade Frist grade Qualified gradeContent of thiourea,% min 99.0 98.5 98.0Loss after heated,% ...