Typical Properties Chemical Name: 2,2-(2,5-Thiophenediyl) Bis[5-(1,1-dimethylethy)] Benzoxazole Molecular Formula: C27H27O2N2 Application (in each ... Plastics: Refer to the directions given above.When OB is used in PMMA polymerization, take care that the polymerization is conducted ... contact with skin and eyes. Soap clean if skin contaminated. 2,2-(2,5-Thiophenediyl) Bis[5-(1,1-dimethylethy)]