The company says it will have links to organisations including the Child Exploitation and Online Protection (Ceop) centre on its reporting pages.
But the director of Ceop says there should be a button on every page.
The conviction of Peter Chapman for the murder of 17-year-old Ashleigh Hall led to renewed calls for a "panic button".
The convicted sex offender lured the teenager to her death using Facebook.
BBC News - Facebook rules out installing 'panic button'