What it is
The label fragment "3,3" appears to be a truncated or malformed ingredient name rather than a complete, recognized INCI entry. Without the full chemical name it is not possible to state a reliable cosmetic role or composition. This entry is intentionally minimal pending clarification of the source listing.
Questions everyone asks
What is the ingredient listed as "3,3"?
It appears to be a truncated or incomplete ingredient name pulled from a product listing, so it cannot be characterized reliably without the full name.
Does it provide UV protection?
There is no indication it functions as a UV filter, and the available data does not support any specific cosmetic claim.