Journal of Pharmaceutical Sciences p. 916 - 917 (1979)
Update date:2022-08-17
Topics:
Jagnandan
Daun
Ambrosio
Gilbert
A yellow compound was isolated from commercially available, discolored, polyethylene ophthalmic closures containing titanium dioxide and butylated hydroxytoluene (I). This compound was present at 7.46 ppm (w/w). It was identified by UV, IR, and mass spectra as 3,3',5,5'-tetrabis (tert-butyl)stilbenequinone (II), a dimer of I. Further structural confirmation was obtained by NMR. Formation of II is catalyzed by titanium dioxide.
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Doi:10.1002/anie.202011357
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