The tube we have says helioplex on the logo. Avobenzone "makes" it helioplex, but older versons say Parsol 17## (don't know the whole number). Oxybenzone should be present in any sunscreen that contains avobenzone to stabilize it. The avobenzone degrades in the sun and is one that must be reapplied.

I went web hunting for a really great article on UVA/UVB spectrum and the various chemical and physical blockers and can't find it. Each checmical has a spread of wavelengths that it works against, just as both Ti and Zn have wave lengths they are most effective at. Avobenzone is the only chemical that works in its designated spectrum. A Ti + Zn physical block will also cover the full spectrum (only Ti or only Zn won't cover the full spectrum).