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DIC Tertiary Butyl Catechol


DIC's Tertiary Butyl Catechol (CAS no. 98-29-3), also known as 4-tert-Butylcatechol or TBC, is a highly specialized polymerization inhibitor with molecular formula C10H14O2. It is used for products such as butadiene, styrene, and other unsaturated hydrocarbons to prevent material loss during production, transport, and storage. It also functions as an antioxidant and a stabilizer for polyethylene, silicone rubber, heptane, vinyl pyridine, and dicyclopentadiene. In stannic tin catalysts and urethane foams, TBC is used as a chelating agent. TBC is a free radical scavenger that can extend gelation time. It will not discolor styrene monomers or crystallize over time, as do various hydroquinone-type inhibitors. 

DIC's 4-tert-Butylcatechol is sold as solids or in a solution with methanol. The solid product is packaged in pre-weighed inclusion packs made of styrene-butadiene copolymer that are 100% soluble in monomers. This provides an additional layer of safety in terms of reduced chemical exposure for personnel who handle the chemical. For more information, review the grades listed below. 

Problems Solved

Uncontrolled polymerization of reactive monomers 
Hazards associated with uncontrolled dimerization 
Free radical generation 
Yellowing and oxidative damage caused by free radicals 


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